Dɛn Ne Anti-Corrosion Coatings?

Ɔde mfe asia hwehwɛɛ mprempren collector foil maa cell nhyehyɛe ahorow. Bere biara nni hɔ a adetɔfo bi ammisa me sɛ menkyerɛkyerɛ nea carbon a wɔde kata so yɛ mu. Wonim anaasɛ ɛnyɛ wɔn asɛm. Enti eyi yɛ ma nnipa a wofii Google sii ha na wɔpɛ sɛ wɔte nneɛma no ase ankasa.

Aluminium krataa a wɔde carbon akata so. Ɛno ne ade a wɔyɛ. Worehwɛ aluminium foil a ɛda hɔ kwa, ebia micron 12 anaa 13, a carbon a ɛyɛ tratraa wɔ n’afã abien no nyinaa. Coating de micron foforo anaa abien ka ho wɔ ɔfã biara. Carbon no yɛ nea ɛma nsu fa mu. Botae no ne sɛ wɔbɛbɔ aluminium ho ban afi cathode slurry no ho bere a wɔreyɛ nkwammoaa no ne electrolyte ho ban afi electrolyte ho bere a nkwammoaa no reyɛ adwuma no.

Nea enti a aluminium sɛe wɔ Li-ion cell mu no nyɛ den. LFP slurry no tu mmirika pH 11 anaa nea ɛboro saa. NMP-based NCM slurry nyɛ basabasa kɛse nanso ɛda so ara nyɛ adamfofa su ma bare metal bere kɔ so no. Ɔsɛe ankasa no si wɔ baabi a nneɛma a ɛyɛ nnam ne foil ntam no. Pitting fi ase wɔ hɔ. Pitting bɛyɛ delamination. Delamination bɛyɛ capacity fade na awiei koraa no field failures. Carbon coating yɛ insurance a ne bo nyɛ den.

Ɛsɛ sɛ meka kɔbere ho asɛm. Anode afã no de kɔbere foil di dwuma. Kɔbere wɔ nsɛmpɔw ahorow. Ɛnyɛ pit sɛnea aluminium yɛ no. Failure mode no yɛ dissolution wɔ high voltage-sɛ wo BMS screws up na overcharges cell no, kɔbere ions kɔ mobile na ɛba awiei wɔ baabi a ɛnsɛ sɛ ɛba. Kɔbere a wɔde akata so wɔ hɔ. Ɛnyɛ nea wɔtaa yɛ wɔ nneɛma a wɔyɛ mu. Silicon anode guys de di dwuma efisɛ silicon boro hell fi foil no ani bere a sakre so. Obiara a aka no mu dodow no ara tu mmirika kɔbere a ɛda hɔ kwa na ɔfrɛ no da.

Ebia Dingsheng a ɛwɔ Zhenjiang no na ɛyɛ aluminium krataa a wɔde akata so a ɛkɔ nkwammoaa mu wɔ wiase nyinaa no fã. Minni wɔn kyɛfa pɔtee na merenyɛ nɔma. Wɔyɛ akɛse. Wanshun ne Chinani agofomma titiriw foforo. Wɔ saa baanu no ne ebia mmarima nketewa baasa anaa baanan ntam no, China de saa nneɛma yi mu dodow no ara mena wiase nyinaa. Pricing out of China runs maybe 15-20% below Japanese material gyina grade ne sɛnea wo ne wo di nkitaho denneennen no so.

Japanfo a wɔde nneɛma ma no da so ara wɔ hɔ. Toyal ayɛ eyi fi ansa na wɔrewo mprempren batere ho mfiridwumayɛfo dodow no ara. UACJ yɛ bi. Nneɛma a ɛyɛ papa no yɛ nea ɛkɔ so daa, bere a wɔde di dwuma no kyɛ, na ne bo yɛ den. Japanfo a wɔyɛ nkwammoaa tɔ Japanfo foil. Obiara a aka no tɔ Chinafo dodow no ara gye sɛ wɔn adetɔfo no wɔ ahwehwɛde pɔtee bi a ɛfa nneɛma a wɔde ma ho.

Korea yɛ bag a wɔadi afra. Iljin yɛ kɔbere foil na ɔyɛ coating. Sɛ wopɛ aluminium a, Koreafo a wɔyɛ nkwammoaa fi amannɔne ba. Mahu Samsung SDI nhyehyɛe ahorow spec Japanfo foil ne LG nhyehyɛe ahorow spec Chinafo foil wɔ kar platform ahorow so ama kar yɛfo koro no ara. Gyinaesi ahorow a ɛfa adetɔ ho wɔ saa gyinabea no fa nneɛma a ɛboro nneɛma a wɔde yɛ adwuma so koraa ho.

Amerikafoɔ nneɛma a wɔyɛ-na meka yei sɛ obi a ɔbɛnya mfasoɔ afiri fie mu akwan pii mu-nnya mmaeɛ. Awarefo bi a wɔyɛ toll coaters a wɔbɛfa wo bare foil no na wɔatu mmirika afa wɔn line no mu. No integrated production wɔ kar mu. IRA sika resen. Nsɛm a wɔde to gua rekɔ so. Ramp-up ankasa yɛ asɛm foforo. Sɛ wo hia li-ion battery foil a ɔde ma a ɔfata ma Amerika Atifi fam nhyehyɛe bi nnɛ a, woda so ara rehwɛ po bi agya.

Nea wɔde kata so no ankasa nyɛ rɔke ho nyansahu. Carbon tuntum, PVDF binder, NMP aduru a wɔde hyɛ mu. Fa fra, fa kata so, ma ɛyow, twitwa mu. Furnace tuntum anaa acetylene tuntum gyina nea ɔde ma no pɛ ne botae conductivity so. Nneɛma bi a ɛyɛ fɛ tow graphene anaa carbon nanotubes gu mu. Marketing ani gye ho saa. Ankasa-wiase adwumayɛ mu nsonsonoe yɛ marginal ma standard EV nkwammoaa. Ebia ɛho hia ma 4C anaa 5C rate applications. Sɛ wɔkyekyem pɛpɛɛpɛ a, wo 1C akwantufo kar pack no renhu.

Nea ɛho hia sen sɛnea wɔyɛ no ne sɛnea wɔhwɛ nneɛma so. Gravure coating ne ɔkwan a wɔfa so yɛ eyi mu dodow no ara. Engraved roll fa slurry, de kɔ foil web a ɛkɔ ase no mu. Ɛte sɛ nea ɛyɛ mmerɛw. Sɛ wode coating weight sie wɔ spec mu wɔ 1200mm web so wɔ mita 40 simma biara mu a ɛnyɛ mmerɛw. Gravure rolls no asɛe. Slurry viscosity sesa wɔ batch bi so. Ɔhyew mu nsakrae nya nneɛma a wɔde kɔ baabi foforo so nkɛntɛnso. Li-ion battery materials distributor betumi akyerɛ wo lot mmienu a ɛfiri ɔdemafoɔ korɔ no ara hɔ, SKU korɔ no ara, na baako bɛnya ne kɛseɛ nsakraeɛ mmɔho mmienu.

Wɛbsaet a wɔde di dwuma no yɛ n’ankasa tiyɛ. Aluminium foil saa nusu a ɛyɛ tratraa yi. Web break kyerɛ sɛ bere a wɔde yɛ adwuma, scrap, ne yield loss. Mmarima a wɔayɛ eyi mfe pii no wɔ wɔn tension profiles dialed in. New entrants sua asuade ahorow a ne bo yɛ den. Chinani adetɔnfo biako a meremmɔ ne din hweree asram abiɛsa a wɔde yɛɛ nneɛma a na ɔrebɔ mmɔden sɛ ɔbɛhyɛ sɛ wɔnyɛ ade foforo a wɔde kata so efisɛ wɔantumi amma wɛb no ansɛe.

Spec nkrataa bisa coating mu duru wɔ gsm, soro resistivity wɔ milliohms biara square, adhesion ahoɔden via crosshatch sɔhwɛ. Saa nɔma ahorow no wɔ hɔ ma ahwehwɛde atirimpɔw ahorow. Da-to-da, nea nkwammoaa yɛfo dwen ho ankasa ne consistency lot to lot. Sɛ wo resistance yɛ 15 milliohms wɔ lot biako so na 25 wɔ nea edi hɔ no so a, ɛno da adi sɛ cell-to-cell nsakrae wɔ packs a wɔawie mu. Kar OEMfo tan nsakrae. Wɔn li-ion battery OEM ahokafo tan sɛ wɔbɛkyerɛkyerɛ nsakrae mu. Obiara hwehwɛ mu kɔ akyiri awiei koraa.

Mahu nhyehyɛe ahorow a ɛtow foil supplier bi gu lot bɔne biako a ɛmaa ɛbɛyɛɛ production cells so. Abusuabɔ ho hia wɔ saa adwuma yi mu. Sɛ obi fata a, egye asram pii. Obiara mpɛ sɛ ɔsan fata bio. Enti wɔn a wɔde nneɛma ma a wɔde nneɛma a ɛkɔ so daa ma no kɔ so tra wɔn adwuma no so. Suppliers a wonnya replaced komm.

Solid-tebea reba awiei koraa. Sulfide electrolytes de nnuru foforo a wɔannwene carbon coatings amma no ba. Oxide ne polymer electrolytes nyɛ ɔhaw kɛse. Nkwammoaa a ɛyɛ den-tebea no wɔ adwumayɛ mu ankasa anaasɛ ɛrebɛn ayɛyɛde-na pii nni hɔ-dodow no ara de nnuru di dwuma wɔ baabi a nneɛma a wɔde kata so a wɔtaa de kata so no yɛ adwuma yiye. Sɛ sulfide-based cells bɔ volume da a, mprempren collector ahobammɔ behia ano aduru foforo. ALD alumina, ebia. Fluoropolymer akwanside ahorow. Obiara nnya nyɛɛ biribiara scale efisɛ nkwammoaa no ankasa nyɛɛ scale.

Mprempren de, carbon coated foil da so ara yɛ nea ɛte mfe aduonu ni. Tebɔɔ. Ɛhia. A line item wɔ BOM no so a procurement bɔ mmɔden sɛ ɛbɛtew ɛka so na engineering bɔ mmɔden sɛ wɔrensusuw ho kosi sɛ biribi bɛkɔ yiye.

Ebia li-ion battery component distributors anum wɔ US betumi ama wo samples wɔ dapɛn biako mu. Sɛ wobɛnya obi a ɔbɛtumi ahyɛ bɔ sɛ wɔbɛkyekyɛ ama 50 GWh nhyehyɛeɛ no yɛ den. Ɛno ne supply chain constraint ankasa wɔ saa fã yi mu. Ɛnyɛ mfiridwuma. Tumi ho bɔhyɛ.