Adwumayɛ ne aba a wonya no yɛ kɛse: Dwuma titiriw a corona ayaresa di wɔ lithium-ion battery electrode a wɔyɛ mu .
Wiase nyinaa a wɔrepiapia akɔ anyinam ahoɔden mu no de ahwehwɛde ahorow a ebi mmae da asi hɔ wɔ adwumayɛ, ahobammɔ, ne ɛka-a ɛwɔ lithium-ion (LI-ion) batere ahorow no ho. Wɔ akoma mu biara a ɛkorɔn-performance battery no da ne electrode-a ɛyɛ den nhyehyɛe a wɔde nneɛma a ɛyɛ adwuma kata dade foils a ɛyɛ tratraa so. Sɛnea saa ade a wɔde kata ade so yi yɛ papa no yɛ ade titiriw, na anammɔn a ɛho hia sen biara, nanso wɔtaa bu ani gu so no mu biako ne nsakrae a wɔyɛ no pɛpɛɛpɛ wɔ soro denam corona ayaresa so.
Adhesion asɛnnennen a ɛwɔ electrode a wɔyɛ mu .
Li-Ion battery electrodes no yɛ denam slurry-Adeɛ a ɛyɛ adwuma a wɔde afrafra (sɛ nhwɛsoɔ, NMC, LFP, graphite graphite), conductive additives, ne polymer binder-ɛkɔ current collector (a ɛtaa yɛ aluminum ma cathode ne kɔbere ma ɔfoforo no). Afei wɔma saa ade a wɔde kata so yi yow wɔ fononoo mu ma ɛyɛ nwini.
Asɛnnennen titiriw no wɔ dade a wɔde ayɛ nneɛma no ani su ahorow mu. Saa foils yi fi awosu mu yɛ hydrophobic na ɛwɔ low surface energy, ɛma ɛnyɛ papa sɛ ɛne nsuo anaa solvent-based slurry bɛkyekyere. Abatade a enye betumi ama:
Electrode delamination: .Active material layer no tetew fi foil no ho bere a woka kalenda (mia) anaasɛ nkwammoaa no winding.
Ɛlektrik ahoɔden a ɛkɔ soro:Nneɛma a ɛyɛ adwuma no ne mprempren nneɛma a wɔboaboa ano no ntam nkitahodi a ɛnhyia no siw ɛlɛtrɔnik nsu a ɛsen no kwan.
Tumi no yera na tumi a ɛyera:Nneɛma nketenkete a asɛe no bɛyɛ nea ɛnyɛ adwuma wɔ anyinam ahoɔden mu, ɛtew tumi so na ɛma emu ahoɔden a ɛwɔ mu no kɔ soro.
Catastrophictrophic huammɔdi:Nneɛma nketenkete a ɛho ayɛ hare no betumi ama nneɛma a ɛwɔ mu no ayɛ tiaa, na ɛde ɔhyew a ɛyɛ hyew aba.
Sɛnea ɛbɛyɛ na wɔadi saa nsɛm yi so no, ɛsɛ sɛ wɔn a wɔyɛ no ma foil no ani ahoɔden yɛ kɛse na ama wɔatumi ayɛ wettability a edi mũ na ayɛ den, a ɛyɛ pɛ a ɛyɛ pɛ wɔ slurry no ho.
Dɛn ne corona ayaresa?
Corona ayaresa yɛ wim plasma mfiridwuma a ɛde-voltage electrical discharge di dwuma de yɛ honam ne nnuru mu nsakrae wɔ ade bi ani a ɛnsakra ne kɛse.
Corona Treater nhyehyɛe a ɛyɛ gyinapɛn a ɛyɛ gyinapɛn no yɛ:
1. Electrode/HV afiri a ɛma anyinam ahoɔden:ɔbɔ-frequency, a ɛkorɔn-voltage tumi.
2. Roller a ɛwɔ fam a ɛwɔ fam:Wɔde dielectric ade (sɛ nhwɛso no, ceramic, silicone rɔba) akata so.
3. Mframa a ɛda ntam: .Ahunmu teateaa a ɛda electrode ne rola a ɛwɔ ase a substrate web no fa mu no ntam.
Bere a anyinam ahoɔden a efi mu ba no yɛ ionizes mframa molecule ahorow a ɛwɔ gap no mu no, ɛma ɛyɛ a ɛyɛ den, ɛba fam-temperature plasma a ions, electron, ne oxygen ahorow a ɛyɛ adwuma yiye (te sɛ ozone) a ɛyɛ adwuma yiye wom.
Sɛnea corona ayaresa dannan battery foil no ani .
Sɛ dade krataa no fa plasma afuw yi mu a, akwan titiriw abien na ɛba:
1. Surface Activation & Energy a Ɛkɔ Anim:
Plasma no tow hyɛ foil no ani so, na ebubu molecule nkitahodi na ɛma mmeae foforo a ɛyɛ adwuma kɛse ba. Saa adeyɛ yi ma foil no ani ahoɔden yɛ kɛse kɛse, na ɛsakra no fi hydrophobic so kɔ hydrophilic so. Ahoɔden a ɛkorɔn a ɛwɔ soro no ma slurry no trɛw pɛpɛɛpɛ na ɛyɛ nkitahodi a ɛbɛn, ade a ɛsɛ sɛ wodi kan yɛ ansa na wɔatumi abata ho denneennen.
2. Micro-Roughening & ahotew:
Energetic ions no honam fam etch soro no wɔ microscopic level, na ɛma asase ani fã kɛse a etu mpɔn. Saa micro-roughening yi ma "anchor points" pii ma binder a ɛwɔ slurry no mu, a ɛma mfiri a ɛka bom no tu mpɔn kɛse. Bere koro no ara mu no, adeyɛ no yi efĩ a aniwa nhu te sɛ ngo, oxide, ne nneɛma a wɔde yɛ adwuma a ebetumi ayɛ adwuma sɛ ɔhye a ɛyɛ mmerɛw no fi hɔ.
Nea efi mu ba ne ade a ɛho ntew, ɛkorɔn-ahoɔden, ne microscopicly rough surface primed pɛpɛɛpɛ ma coating.
Mfaso a ɛwɔ corona ayaresa so ma li-ion batteron batere .
Corona ayaresa a wɔde bɛka electrode a wɔyɛ no ho no ma wonya mfaso kɛse:
Ahoɔden a ɛkorɔn a ɛbata ho:Siw delamination ano wɔ bere a wɔreyɛ nsu no ase ne batere no nyinaa a ɛyɛ adwuma no mu, na ɛma mfiri no mudi mu kura yɛ kɛse.
Coating a ɛyɛ pɛ a wɔatu mpɔn:hwɛ hu sɛ slurry coats no yɛ pɛpɛɛpɛ a DE-a ɛyɛ nsu anaasɛ ɛyɛ pinholes, na ɛde electrochemical adwumayɛ a ɛkɔ so daa wɔ electrode no so.
rate tumi a ɛkɔ soro ne kyinhyia asetra:Ɛdenam hwɛ a wɔbɛhwɛ ma anyinam ahoɔden nkitahodi a eye sen biara aba nneɛma nketenkete biara ne mprempren boaboa ano no so no, corona ayaresa no ma ntam a ɛko tia nyarewa no so tew, na ɛno ho hia kɛse ma charge a wɔde bɔ ntɛmntɛm ne bere tenten a wɔde di akɔneaba no.
Nneɛma a wɔyɛ no dodow a ɛkɔ soro:Nneɛma a wɔsɛe no a wɔtew so esiane sɛ wɔde kata so sintɔ nti no brɛ ka a wɔbɔ wɔ nneɛma a wɔyɛ ho no ase tẽẽ.
Nea ɛne nsu a wɔde kyekyere nneɛma ho hyia:Bere a nnwuma no redan akɔ nsu a wɔde yɛ nneɛma a ɛnyɛ nea atwa yɛn ho ahyia kɛse so no, corona ayaresa no bɛyɛ nea ɛho hia kɛse mpo na ama wɔanya adhesion levels a wɔde toto atetesɛm solvent-gyina nhyehyɛe ahorow ho.
Dry, instantaneous process: .Nea ɛnte sɛ nnuru primers anaa ogya aduru no, ɛyɛ adeyɛ a ɛho tew, a ɛyɛ nwunu a ɛho nhia sɛ wɔde bere a wɔde bɛyow, na ɛma ɛyɛ nea eye ma akyɛde a ɛkorɔn-ntɛm, roll-kɔ-roll production lines.
Pɛpɛɛpɛ ma next-Awo ntoatoaso batere .
Wɔ battery mfiridwuma a ɛkɔ anim te sɛ silicon-anodes anaa solid-State battery ho no, dwuma a ɛwɔ soro mfiridwuma mu no bɛyɛ nea ɛho hia kɛse mpo. Silicon particles no fa volume ntrɛwmu kɛse mu bere a sakre no rekɔ so no, na ɛde adwennwen kɛse ba abusuabɔ a ɛda mprempren boaboa ano no so. Nkitahodi a ɛyɛ den, corona-aduru a wɔde ayɛ adwuma no ho hia na ama anyinam ahoɔden nkitahodi ne nhyehyɛe mudi mu kura akɔ so denam charge ɔhaha pii-yi cycles so.
Awie
Wɔ akansi kɛse a ɛfa batere a wɔyɛ ho no, mfaso kakraa bi a wonya wɔ adwumayɛ mu ne aba a wonya no kyerɛ aguadi mu mfaso atitiriw a ɛho hia ase. Corona ayaresa nyɛ anammɔn a wobetumi apaw ara kwa na mmom ɛyɛ mfiridwuma a ɛma wotumi yɛ mfiridwuma a ɛma wotumi yɛ nneɛma a wotumi de ho to so, a ɛkorɔn-energy-Density lithium-ion batere. Ɛdenam nsakrae a ɛyɛ pɛpɛɛpɛ, a wɔhyɛ so, na ɛyɛ adwuma yiye a wɔde ma so no, ɛhwɛ ma batere no adansi nneɛma ankasa-ɛlektrɔnik-yɛ adwuma ma ɛyɛ adwuma yiye, ahobammɔ, ne nkwa tenten, na ɛma daakye a ɛfa akwantu ne ahoɔden a wɔkora so no ahoɔden.