Ọkwa batrị na ihe mkpuchi aluminom mkpuchi carbon: Ntuziaka nka
Batrị aluminum foil bụ onye na-anakọta cathode dị ugbu a na cell lithium-ion - mkpụrụ metal nke ihe na-arụ ọrụ cathode na-ekpuchi ya., na nke na-ebupụta ugbu a site na electrode. Ọ nweghị ọrụ electrochemical. Ọ naghị echekwa ike. Na kpomkwem n'ihi na ọ bụ “inert”, ọ dị mfe n'okpuru-akọwapụta.
Nke ahụ bụ mmejọ. Foil onye nchịkọta ugbu a na-emetụta nguzogide ihu, mkpuchi mkpuchi, ike ọnụego, okirikiri ndụ, na ntupu ego na ahịrị mkpuchi nke nwere ike na-agba ọsọ na iri mita kwa nkeji. Inweta ya na-ezighi ezi dị oke ọnụ n'ụzọ siri ike ịchọta azụ na foil.
Ntuziaka a na-ekpuchi nhọrọ alloy, mesho, obioku, ikpe maka mkpuchi carbon, na paramita kwesịrị itinye n'ime nkọwapụta.
Gịnị mere aluminum maka cathode na ọla kọpa maka anode
Ebe mmalite bara uru, n'ihi na ọ na-akọwa ọtụtụ n'ime echiche imewe:
| Cathode ugbu a mkpokọta | Onye nchịkọta ugbu a anode | |
| Ihe onwunwe | Aluminom foil | Ọla kọpa |
| Gini | Aluminom na-etolite ụlọ siri ike, oyi akwa oxide passivating na ikike cathode, ma dị mfe ma dị ọnụ ala | Ọla kọpa kwụsiri ike na ala (anode) ikike mana ọ ga-eji lithium mee ihe |
| Njupụta | 2.7 g/cm³ | 8.96 g/cm³ |
A na-eji aluminom mee ihe na cathode n'ihi na ọla kọpa ga-agbaze na voltaji cathode, na aluminom n'ihi na ọla kọpa ga-adị arọ nke ukwuu. Ọ bụrụ na ị na-eri nri maka sel sodium-ion, rụba nke ahụ ama ha abụọ electrodes nwere ike iji aluminom foil - sodium adịghị alloy na aluminum ka lithium si eme. Nke a bụ otu ihe mere sodium-ion ji mara mma na ọnụ ahịa, na ọ bụ ihe na-eto eto na-achọ foil batrị.
Nhọrọ alloy ntọala
Igwe batrị na-eji usoro 1xxx - aluminom dị ọcha nke azụmahịa - n'ihi na ihe omume na ịdị ọcha karịa ike..
| Alloy | Ojiji a na-ahụkarị | Ndetu |
| 1235 | Alloy foil batrị kacha ewu ewu | ≥99.35% Al. Ezigbo itule nke conductivity na ọnụ ahịa |
| 1060 | Ejiri ọtụtụ ebe, ubé elu ịdị ọcha | ≥99.60% Al |
| 1070 | Nhọrọ ịdị ọcha dị elu | ≥99.70% Al |
| 1050 | Ejiri ya na ụfọdụ batrị na foil eletrọnịkị | ≥99.50% Al |
| 1100 | Ahọpụtara ebe achọrọ ike dị elu karịa | Nwere obere Cu |
Atụle ịdị ọcha n'ihe mmepụta ihe na-adịkarị karịa nkọwapụta kacha nta - nkọwapụta ≥99.0% na-atụkarị ≥99.5% na omume..
Ndụmọdụ bara uru: akọwapụtala ịdị ọcha ọ gwụla ma kemistri electrode gị chọrọ ya. Nzọụkwụ ọ bụla dị ọcha na-efu ego, na 1235 na-ejikwa ọtụtụ usoro cathode azụmahịa.
Mesho: map okporo ụzọ, na nrụgide ịkawanye njọ
Foil dị gịrịgịrị pụtara oke anaghị arụ ọrụ na cell, nke pụtara njupụta ume dị elu. Ụlọ ọrụ ahụ dum na-agbada.
| Ọkpụrụkpụ | Ọnọdụ |
| 20 μm | Ụkpụrụ ochie, a ka na-eji ya ebe a na-eji ike eme ihe |
| 18 μm | Conservative, ezigbo usoro kwụsie ike |
| 16 μm | Na-emekarị na mmepụta olu |
| 15 μm | A na-ahụkarị maka njupụta ike dị elu |
| 13 μm | Isi ihe dị ugbu a maka sel ike dị elu |
| 12 μm | Mkpụrụ ndụ njupụta dị elu, na-achọ njikwa usoro |
| 10 μm na n'okpuru | N'ihu ihu, obere ọkọnọ |
Maka mkpụrụ ndụ njupụta ike dị elu, 12-15 μm bụ mbụ nhọrọ. Maka ngwa ebe nkwụsi ike mkpuchi mkpuchi na njikwa ike dị mkpa karịa pasent ole na ole ikpeazụ nke njupụta ike, 18-20 μm na-enye mma usoro oke na obere scabi.
Azụmahịa ahụ dị adị: ka foil na-akawanye njọ, ọ na-akpụ akpụ ma na-agbatị ngwa ngwa n'ọsọ dị elu, na-agbawa ngwa ngwa na bends, ma na-achọ njikwa nlele siri ike site na igwe igwe. Ọ bụrụ na ahịrị mkpuchi gị adịghị edozi nke ọma, na-agbada site na 16 μm na 13 μm nwere ike na-eri gị ihe na scrap karịa ka ọ na-enweta na njupụta ume.
Iwe na akụrụngwa akụrụngwa
Foil batrị kwesịrị ịhazi ụdị ọdịda abụọ. Ọ dị nro ma ọ na-agbaji ma ọ bụ na-agbatị n'oge mkpuchi na-agba ọsọ na ikuku. O siri ike ma ọ na-agbawa na bends ma sie ike ikuku.
| Iwe | Ike tensile na-ahụkarị | Mgbatị a na-ahụkarị | Ojiji a na-ahụkarị |
| O (keeji anya) | 60- 100 MPa | 3-15% | Ngwa chọrọ ductility na akpụ kwụsie ike |
| H18 (zuru ike) | 120- 170 MPa | 1-4% | Elu-ike foil maka akara usoro ahịrị |
| H19 | 140- 190 MPa | 1-3% | Achọrọ isi ike dị elu |
A na-enye ọtụtụ foil batrị na H18. Ezi ụkpụrụ na-adabere na alloy, mesho, Mbelata mbelata na ọnọdụ mgbakasị ahụ - kwenye n'usoro ihe eji arụ ọrụ nkwekọrịta ma chọọ ka akọwara ya na akwụkwọ nyocha ihe maka nzapụta mmepụta ọ bụla.
Ụkpụrụ ntụaka a na-ahụkarị maka ngwaahịa mkpuchi: ike tensile ≥180 MPa, elongation >1.5%.
Foil larịị vs carbon mkpuchi mkpuchi
Nke a bụ mkpebi kacha mkpa na ntuziaka a, ya mere ọ bara uru ịbụ nke ziri ezi.
Nsogbu mkpuchi carbon na-edozi
Mgbe a na-ekpuchi cathode slurry ozugbo na foil aluminum efu, ihe atọ na-arụ ọrụ megide gị:
- Nguzogide kọntaktị. Ihe na-arụ ọrụ na-emetụ ígwè ahụ naanị na isi ihe dị iche iche. Mmegide kọntaktị ihu dị elu, nke na-ewute ike ọnụego ma na-ebute ohmic kpo oku.
- Nrasion. Nrapagidere nrapanye na igwe dị ire ụtọ adịghị ike karịa ka ọ dị ike, elu-elu-ebe oyi akwa carbon. Adhesion na-adịghị mma pụtara delamination n'oge kalenda na ịgba ígwè.
- Korosion. N'elu aluminum nwere ike imebi na kọntaktị na electrolyte n'elu ogologo oge ịgba ígwè, karịsịa na voltaji dị elu yana ụfọdụ kemistri.
Ihe oyi akwa carbon na-eme
Igwe ikuku nke sub-micron na-eduzi carbon - na-abụkarị carbon ojii, eserese, graphene ma ọ bụ ngwakọta, etinyere ya na ihe nkedo - na-arụ ọrụ dị ka àkwà mmiri na-arụ ọrụ n'etiti ígwè na ihe na-arụ ọrụ:
- Na-abawanye mpaghara kọntaktị dị irè, lowering interfacial contact resistance
- Improves electrode adhesion, reducing delamination
- Protects the aluminum from oxidation and electrolyte corrosion
- Improves rate capability and cycle stability
- Improves electrolyte wettability during filling
It is a small addition in mass terms and a large one in performance terms.
Carbon coated specifications
| Oke | Typical requirement |
| Base foil alloy | 1050, 1060, 1100, 1235 |
| Base foil thickness | 12-20 μm (9–30 μm available) |
| Coating sides | Single side or double side |
| Carbon layer thickness | ≥1 μm per side (0.5–2 μm range, customisable) |
| Nguzogide elu | ≤5 mΩ (production material commonly measures 1–2 mΩ) |
| Esemokwu iwe mmiri dị n'elu | ≥30 dyne for bare foil; ≥40–50 dyne for carbon-coated |
| Coating adhesion | No delamination after 3M tape pull |
| Solvent resistance | >200 cotton-swab cycles without exposing the foil |
| Electrolyte immersion | No delamination after 24 h |
| Edge margin (keenweghi agha) | Otutu 15 ± 1 mm |
| Areal density (16 μm, efated) | ~42 g/m² |
| Drying compatibility | Vacuum drying up to 150 Celsius C |
Single side or double side? Match it to your electrode coating configuration. Double-side carbon coating gives lower interfacial resistance and better high-rate performance, and is standard for power cells and pouch cells. Single side is often sufficient and cheaper for energy cells or where only one face receives active material.
Coating width is matched to your die — common widths include 170 mm, 230 mm, 260 mm and 280 mm, with an uncoated edge margin for welding the tab.
Ogo elu: where most problems actually start
Surface condition has a direct effect on slurry coating. Mmetọ, excess rolling oil, igba, dents, edge cracks or uneven roughness all translate into coating defects and rejected electrode.
Requirements to specify:
- Clean surface with controlled residual rolling oil — this is critical. Residual oil reduces slurry wettability and causes coating defects
- No visible corrosion, oxidation staining, black lines or foreign inclusions
- No folds, oké ọkọchị, ihu ife, telescoping or loose winding
- Controlled roughness matched to your coating process
- Stable flatness to support uniform coating and drying
- Slit edges with limited burr and no continuous edge cracking
If you are introducing a new electrode formulation, run trial coils before mass production. Coating behaviour depends on the interaction between your active material, binder, ihe mgbaze, coating weight and calendaring conditions — the foil is one variable in that system, and the only way to know is to test it.
Nyocha na njikwa mma
Reputable mills inspect throughout production rather than sampling only at the end. Typical inspection items:
| Ihe | Ihe ebu n'obi mee ihe |
| Ihe mejupụtara kemịkal | Confirms alloy compliance |
| Ntụle ịdị arọ | Verifies gauge accuracy and uniformity |
| Width measurement | Confirms slit tolerance |
| Tensile strength and elongation | Verifies temper and mechanical stability |
| Surface inspection | Ọkpụkpụ, ntụpọ, oil marks, nsonye |
| Nyocha pinhole | Suitability for thin-gauge use |
| Ogo ihu | Burrs, mgbawa, trimming defects |
| Coil shape | Telescoping, loose winding, edge alignment |
Ask for certificates of analysis, coil labels, packing lists and inspection records as contract deliverables. Gauge uniformity across the coil width and length is what reduces your coating weight variation and electrode rejection rate — this is the parameter worth arguing about.
Packaging and storage
Battery foil is sensitive to moisture, uzuzu, mechanical damage and surface contamination.
- Coils should be packed with protective wrapping, moisture-resistant material, edge protection, and export-grade wooden pallets or cases
- Store in a dị ọcha, ụlọ nkwakọba ihe akọrọ, away from corrosive chemicals, condensation and direct floor contact
- Keep sealed until use — surface oxidation and moisture adsorption degrade coating performance
- Respect first-in, first-out rotation
RFQ checklist
A request that says “batrị foil 13 μm” will not get you a useful quote. Include:
- Base alloy — e.g. 1235
- Thickness and tolerance — e.g. 13 μm, ±5%
- Temper and mechanical requirements — e.g. H18, tensile 120–170 MPa
- Plain or carbon coated — and if coated: single or double side
- Carbon layer thickness — e.g. 1 μm per side
- Width and edge margin — e.g. 230 mm coated width, 15 mm margin each side
- Target surface resistance — e.g. ≤2 mΩ
- Surface cleanliness requirement — residual oil limit, if you have one
- Coil ID / OD and length
- Monthly volume and delivery schedule
- Documents required — COA, MSDS, REACH/RoHS, material test certificate
Ajụjụ a na-ajụkarị
What is the difference between battery foil and ordinary aluminum foil? Battery foil is a high-purity 1xxx alloy with far tighter controls on gauge uniformity, elu ịdị ọcha, residual rolling oil and pinholes. Ordinary packaging foil is not produced to those tolerances and will cause coating defects.
Why is carbon coating used on cathode foil? It lowers interfacial contact resistance between the aluminum substrate and the cathode active material, improves adhesion, protects against corrosion, and improves rate capability and cycle life.
Should I choose single-side or double-side carbon coating? Double side for power cells, pouch cells and high-rate applications where lowest interfacial resistance matters. Single side is often sufficient for energy cells and costs less. Match it to your electrode coating configuration.
How thin can battery aluminum foil go? 12 μm is in volume use for high-energy cells; 10 μm and below exists but supply is limited. Going thinner requires both a capable mill and a well-tuned coating line — otherwise scrap increases faster than energy density improves.
Can sodium-ion batteries use aluminum foil for both electrodes? Okwukwe. Sodium does not alloy with aluminum the way lithium does, so both current collectors can be aluminum foil. This is part of sodium-ion’s cost advantage and is contributing to demand growth.
What is the typical lead time and MOQ? Both depend on gauge, coating configuration and volume. Coated and slit foil requires additional processing steps beyond plain foil. State your volume and schedule in the RFQ for an accurate figure.
How should I store carbon coated foil? Akara akara, akọrọ, dị ọcha, below roughly 40 Celsius C, off the floor, away from condensation and corrosive chemicals, used first-in-first-out.
Discuss your specification
Send us your base alloy, mesho, temper and coating configuration — or tell us your cell chemistry, energy density target and coating line parameters, and we will recommend a starting specification and arrange trial coils for evaluation.
Ọkwa batrị na ihe mkpuchi aluminom mkpuchi carbon: Ntuziaka nka
Batrị aluminum foil bụ onye na-anakọta cathode dị ugbu a na cell lithium-ion - mkpụrụ metal nke ihe na-arụ ọrụ cathode na-ekpuchi ya., na nke na-ebupụta ugbu a site na electrode. Ọ nweghị ọrụ electrochemical. Ọ naghị echekwa ike. Na kpomkwem n'ihi na ọ bụ “inert”, ọ dị mfe n'okpuru-akọwapụta.
Nke ahụ bụ mmejọ. Foil onye nchịkọta ugbu a na-emetụta nguzogide ihu, mkpuchi mkpuchi, ike ọnụego, okirikiri ndụ, na ntupu ego na ahịrị mkpuchi nke nwere ike na-agba ọsọ na iri mita kwa nkeji. Inweta ya na-ezighi ezi dị oke ọnụ n'ụzọ siri ike ịchọta azụ na foil.
Ntuziaka a na-ekpuchi nhọrọ alloy, mesho, obioku, ikpe maka mkpuchi carbon, na paramita kwesịrị itinye n'ime nkọwapụta.
Gịnị mere aluminum maka cathode na ọla kọpa maka anode
Ebe mmalite bara uru, n'ihi na ọ na-akọwa ọtụtụ n'ime echiche imewe:
| Cathode ugbu a mkpokọta | Onye nchịkọta ugbu a anode | |
| Ihe onwunwe | Aluminom foil | Ọla kọpa |
| Gini | Aluminom na-etolite ụlọ siri ike, oyi akwa oxide passivating na ikike cathode, ma dị mfe ma dị ọnụ ala | Ọla kọpa kwụsiri ike na ala (anode) ikike mana ọ ga-eji lithium mee ihe |
| Njupụta | 2.7 g/cm³ | 8.96 g/cm³ |
A na-eji aluminom mee ihe na cathode n'ihi na ọla kọpa ga-agbaze na voltaji cathode, na aluminom n'ihi na ọla kọpa ga-adị arọ nke ukwuu. Ọ bụrụ na ị na-eri nri maka sel sodium-ion, rụba nke ahụ ama ha abụọ electrodes nwere ike iji aluminom foil - sodium adịghị alloy na aluminum ka lithium si eme. Nke a bụ otu ihe mere sodium-ion ji mara mma na ọnụ ahịa, na ọ bụ ihe na-eto eto na-achọ foil batrị.
Nhọrọ alloy ntọala
Igwe batrị na-eji usoro 1xxx - aluminom dị ọcha nke azụmahịa - n'ihi na ihe omume na ịdị ọcha karịa ike..
| Alloy | Ojiji a na-ahụkarị | Ndetu |
| 1235 | Alloy foil batrị kacha ewu ewu | ≥99.35% Al. Ezigbo itule nke conductivity na ọnụ ahịa |
| 1060 | Ejiri ọtụtụ ebe, ubé elu ịdị ọcha | ≥99.60% Al |
| 1070 | Nhọrọ ịdị ọcha dị elu | ≥99.70% Al |
| 1050 | Ejiri ya na ụfọdụ batrị na foil eletrọnịkị | ≥99.50% Al |
| 1100 | Ahọpụtara ebe achọrọ ike dị elu karịa | Nwere obere Cu |
Atụle ịdị ọcha n'ihe mmepụta ihe na-adịkarị karịa nkọwapụta kacha nta - nkọwapụta ≥99.0% na-atụkarị ≥99.5% na omume..
Ndụmọdụ bara uru: akọwapụtala ịdị ọcha ọ gwụla ma kemistri electrode gị chọrọ ya. Nzọụkwụ ọ bụla dị ọcha na-efu ego, na 1235 na-ejikwa ọtụtụ usoro cathode azụmahịa.
Mesho: map okporo ụzọ, na nrụgide ịkawanye njọ
Foil dị gịrịgịrị pụtara oke anaghị arụ ọrụ na cell, nke pụtara njupụta ume dị elu. Ụlọ ọrụ ahụ dum na-agbada.
| Ọkpụrụkpụ | Ọnọdụ |
| 20 μm | Ụkpụrụ ochie, a ka na-eji ya ebe a na-eji ike eme ihe |
| 18 μm | Conservative, ezigbo usoro kwụsie ike |
| 16 μm | Na-emekarị na mmepụta olu |
| 15 μm | A na-ahụkarị maka njupụta ike dị elu |
| 13 μm | Isi ihe dị ugbu a maka sel ike dị elu |
| 12 μm | Mkpụrụ ndụ njupụta dị elu, na-achọ njikwa usoro |
| 10 μm na n'okpuru | N'ihu ihu, obere ọkọnọ |
Maka mkpụrụ ndụ njupụta ike dị elu, 12-15 μm bụ mbụ nhọrọ. Maka ngwa ebe nkwụsi ike mkpuchi mkpuchi na njikwa ike dị mkpa karịa pasent ole na ole ikpeazụ nke njupụta ike, 18-20 μm na-enye mma usoro oke na obere scabi.
Azụmahịa ahụ dị adị: ka foil na-akawanye njọ, ọ na-akpụ akpụ ma na-agbatị ngwa ngwa n'ọsọ dị elu, na-agbawa ngwa ngwa na bends, ma na-achọ njikwa nlele siri ike site na igwe igwe. Ọ bụrụ na ahịrị mkpuchi gị adịghị edozi nke ọma, na-agbada site na 16 μm na 13 μm nwere ike na-eri gị ihe na scrap karịa ka ọ na-enweta na njupụta ume.
Iwe na akụrụngwa akụrụngwa
Foil batrị kwesịrị ịhazi ụdị ọdịda abụọ. Ọ dị nro ma ọ na-agbaji ma ọ bụ na-agbatị n'oge mkpuchi na-agba ọsọ na ikuku. O siri ike ma ọ na-agbawa na bends ma sie ike ikuku.
| Iwe | Ike tensile na-ahụkarị | Mgbatị a na-ahụkarị | Ojiji a na-ahụkarị |
| O (keeji anya) | 60- 100 MPa | 3-15% | Ngwa chọrọ ductility na akpụ kwụsie ike |
| H18 (zuru ike) | 120- 170 MPa | 1-4% | Elu-ike foil maka akara usoro ahịrị |
| H19 | 140- 190 MPa | 1-3% | Achọrọ isi ike dị elu |
A na-enye ọtụtụ foil batrị na H18. Ezi ụkpụrụ na-adabere na alloy, mesho, Mbelata mbelata na ọnọdụ mgbakasị ahụ - kwenye n'usoro ihe eji arụ ọrụ nkwekọrịta ma chọọ ka akọwara ya na akwụkwọ nyocha ihe maka nzapụta mmepụta ọ bụla.
Ụkpụrụ ntụaka a na-ahụkarị maka ngwaahịa mkpuchi: ike tensile ≥180 MPa, elongation >1.5%.
Foil larịị vs carbon mkpuchi mkpuchi
Nke a bụ mkpebi kacha mkpa na ntuziaka a, ya mere ọ bara uru ịbụ nke ziri ezi.
Nsogbu mkpuchi carbon na-edozi
Mgbe a na-ekpuchi cathode slurry ozugbo na foil aluminum efu, ihe atọ na-arụ ọrụ megide gị:
- Nguzogide kọntaktị. Ihe na-arụ ọrụ na-emetụ ígwè ahụ naanị na isi ihe dị iche iche. Mmegide kọntaktị ihu dị elu, nke na-ewute ike ọnụego ma na-ebute ohmic kpo oku.
- Nrasion. Nrapagidere nrapanye na igwe dị ire ụtọ adịghị ike karịa ka ọ dị ike, elu-elu-ebe oyi akwa carbon. Adhesion na-adịghị mma pụtara delamination n'oge kalenda na ịgba ígwè.
- Korosion. N'elu aluminum nwere ike imebi na kọntaktị na electrolyte n'elu ogologo oge ịgba ígwè, karịsịa na voltaji dị elu yana ụfọdụ kemistri.
Ihe oyi akwa carbon na-eme
Igwe ikuku nke sub-micron na-eduzi carbon - na-abụkarị carbon ojii, eserese, graphene ma ọ bụ ngwakọta, etinyere ya na ihe nkedo - na-arụ ọrụ dị ka àkwà mmiri na-arụ ọrụ n'etiti ígwè na ihe na-arụ ọrụ:
- Na-abawanye mpaghara kọntaktị dị irè, lowering interfacial contact resistance
- Improves electrode adhesion, reducing delamination
- Protects the aluminum from oxidation and electrolyte corrosion
- Improves rate capability and cycle stability
- Improves electrolyte wettability during filling
It is a small addition in mass terms and a large one in performance terms.
Carbon coated specifications
| Oke | Typical requirement |
| Base foil alloy | 1050, 1060, 1100, 1235 |
| Base foil thickness | 12-20 μm (9–30 μm available) |
| Coating sides | Single side or double side |
| Carbon layer thickness | ≥1 μm per side (0.5–2 μm range, customisable) |
| Nguzogide elu | ≤5 mΩ (production material commonly measures 1–2 mΩ) |
| Esemokwu iwe mmiri dị n'elu | ≥30 dyne for bare foil; ≥40–50 dyne for carbon-coated |
| Coating adhesion | No delamination after 3M tape pull |
| Solvent resistance | >200 cotton-swab cycles without exposing the foil |
| Electrolyte immersion | No delamination after 24 h |
| Edge margin (keenweghi agha) | Otutu 15 ± 1 mm |
| Areal density (16 μm, efated) | ~42 g/m² |
| Drying compatibility | Vacuum drying up to 150 Celsius C |
Single side or double side? Match it to your electrode coating configuration. Double-side carbon coating gives lower interfacial resistance and better high-rate performance, and is standard for power cells and pouch cells. Single side is often sufficient and cheaper for energy cells or where only one face receives active material.
Coating width is matched to your die — common widths include 170 mm, 230 mm, 260 mm and 280 mm, with an uncoated edge margin for welding the tab.
Ogo elu: where most problems actually start
Surface condition has a direct effect on slurry coating. Mmetọ, excess rolling oil, igba, dents, edge cracks or uneven roughness all translate into coating defects and rejected electrode.
Requirements to specify:
- Clean surface with controlled residual rolling oil — this is critical. Residual oil reduces slurry wettability and causes coating defects
- No visible corrosion, oxidation staining, black lines or foreign inclusions
- No folds, oké ọkọchị, ihu ife, telescoping or loose winding
- Controlled roughness matched to your coating process
- Stable flatness to support uniform coating and drying
- Slit edges with limited burr and no continuous edge cracking
If you are introducing a new electrode formulation, run trial coils before mass production. Coating behaviour depends on the interaction between your active material, binder, ihe mgbaze, coating weight and calendaring conditions — the foil is one variable in that system, and the only way to know is to test it.
Nyocha na njikwa mma
Reputable mills inspect throughout production rather than sampling only at the end. Typical inspection items:
| Ihe | Ihe ebu n'obi mee ihe |
| Ihe mejupụtara kemịkal | Confirms alloy compliance |
| Ntụle ịdị arọ | Verifies gauge accuracy and uniformity |
| Width measurement | Confirms slit tolerance |
| Tensile strength and elongation | Verifies temper and mechanical stability |
| Surface inspection | Ọkpụkpụ, ntụpọ, oil marks, nsonye |
| Nyocha pinhole | Suitability for thin-gauge use |
| Ogo ihu | Burrs, mgbawa, trimming defects |
| Coil shape | Telescoping, loose winding, edge alignment |
Ask for certificates of analysis, coil labels, packing lists and inspection records as contract deliverables. Gauge uniformity across the coil width and length is what reduces your coating weight variation and electrode rejection rate — this is the parameter worth arguing about.
Packaging and storage
Battery foil is sensitive to moisture, uzuzu, mechanical damage and surface contamination.
- Coils should be packed with protective wrapping, moisture-resistant material, edge protection, and export-grade wooden pallets or cases
- Store in a dị ọcha, ụlọ nkwakọba ihe akọrọ, away from corrosive chemicals, condensation and direct floor contact
- Keep sealed until use — surface oxidation and moisture adsorption degrade coating performance
- Respect first-in, first-out rotation
RFQ checklist
A request that says “batrị foil 13 μm” will not get you a useful quote. Include:
- Base alloy — e.g. 1235
- Thickness and tolerance — e.g. 13 μm, ±5%
- Temper and mechanical requirements — e.g. H18, tensile 120–170 MPa
- Plain or carbon coated — and if coated: single or double side
- Carbon layer thickness — e.g. 1 μm per side
- Width and edge margin — e.g. 230 mm coated width, 15 mm margin each side
- Target surface resistance — e.g. ≤2 mΩ
- Surface cleanliness requirement — residual oil limit, if you have one
- Coil ID / OD and length
- Monthly volume and delivery schedule
- Documents required — COA, MSDS, REACH/RoHS, material test certificate
Ajụjụ a na-ajụkarị
What is the difference between battery foil and ordinary aluminum foil? Battery foil is a high-purity 1xxx alloy with far tighter controls on gauge uniformity, elu ịdị ọcha, residual rolling oil and pinholes. Ordinary packaging foil is not produced to those tolerances and will cause coating defects.
Why is carbon coating used on cathode foil? It lowers interfacial contact resistance between the aluminum substrate and the cathode active material, improves adhesion, protects against corrosion, and improves rate capability and cycle life.
Should I choose single-side or double-side carbon coating? Double side for power cells, pouch cells and high-rate applications where lowest interfacial resistance matters. Single side is often sufficient for energy cells and costs less. Match it to your electrode coating configuration.
How thin can battery aluminum foil go? 12 μm is in volume use for high-energy cells; 10 μm and below exists but supply is limited. Going thinner requires both a capable mill and a well-tuned coating line — otherwise scrap increases faster than energy density improves.
Can sodium-ion batteries use aluminum foil for both electrodes? Okwukwe. Sodium does not alloy with aluminum the way lithium does, so both current collectors can be aluminum foil. This is part of sodium-ion’s cost advantage and is contributing to demand growth.
What is the typical lead time and MOQ? Both depend on gauge, coating configuration and volume. Coated and slit foil requires additional processing steps beyond plain foil. State your volume and schedule in the RFQ for an accurate figure.
How should I store carbon coated foil? Akara akara, akọrọ, dị ọcha, below roughly 40 Celsius C, off the floor, away from condensation and corrosive chemicals, used first-in-first-out.
Discuss your specification
Send us your base alloy, mesho, temper and coating configuration — or tell us your cell chemistry, energy density target and coating line parameters, and we will recommend a starting specification and arrange trial coils for evaluation.