Ongororo yeZvikonzero Zvekurasikirwa Kupisa kweLithium Ion Battery Positive Materials

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Soláthraí Stáisiún Cumhachta Inaistrithe

Motokari yemagetsi inomiririrwa naTesra inoshandiswa kushandisa NCA, NCM811 kana NCM622 high nickel-based material se lithium ion battery positive material. Nekudaro, iyi yakakwirira-nickel layer-yakaita yakanaka electrode zvinhu zvine matambudziko ekuchengetedza, Canadian light source simba rekuchengetedza boka Dr. Zhou Wei, Dr.

Wang Jian, Wang Jian, Chemical Imaging Line Station uye mutevedzeri wepurofesa we Xiamen University of Science and Technology, kekutanga, chikamu chekugovera chakaoma composite electrode kupisa kusvika yakaoma composite electrode kupisa kusingadzoreki, uye multi-phase kupatsanurwa chiitiko pamberi uye mushure mekupisa. Relevance inoonekwa ne nano-level, uye inowanikwa kuti thermal kunze kwekutonga inogona kuenderana zvakanyanya nekugoverwa kwemaconductor uye mabhainda. Iyo lithium ion bhatiri inomiririrwa neNCA, NCM811 kana NCM622 ine zvakanakira huwandu hwepamusoro, mutengo wakaderera, uye njodzi dzezvakatipoteredza.

Parizvino, motokari yemagetsi inomiririrwa naTesla inoshandiswa. Zvisinei, pane dambudziko pamberi pekuchengetedzwa kwepamusoro nickel layered positive electrodes, kunyanya pakupisa kwakadzika kuderera kwezvinhu, kusunungurwa kweokisijeni, kunokonzera kupisa kusingadzoreki, zvichikonzera kuputika kwebhatiri. Kubva pamaonero edzidziso yekutanga, kunzwisisa kwakadzama kwechikamu chekupatsanurwa kwesimba remagetsi maelectrodes pasi pekupisa kwekunze-kwekutonga kwakakosha kugadzirisa kusimba kwekugadzikana kwechinhu ichi chemukati.

Kubva pakuona kwekuongorora kunoshanda, maitiro echikamu chekudzidza akaparadzaniswa mune chaiyo porous composite electrode, uye inoenderana nehukuru mhedzisiro yeyakanaka electrode zvinhu, kuwirirana pakati pekristaro pamusoro pemutemo, uye pamusoro passivation firimu, ndiyo hwaro hwekutsvagisa uye chaiyo chikamu chekushandisa. Yakasanganiswa nzira yakanaka. Nekudaro, iyi pfungwa inofanirwa kunge ine advanced characterization zvinoreva kuti zviitwe.

Dr. Zhou Wei, Canadian Light Source Storage Group, uye Dr. Wang Jian muChemical Imaging Line chiteshi anoshanda padhuze nemutevedzeri wemunyori wemumugwagwa weXiamen University of Technology kuti atange kutapurirana X-ray scanning yezvinhu uye orbit selectivity, makemikari uye zvemagetsi zvimiro.

MicroT (PEEM) inoshandiswa kudzidza maitiro ekuparadzaniswa kwechikamu che thermostatic acid lithium lithium laminate particles mu porous electrode. Iri basa rinotaurwa seyekutsvagisa inosimbisa muchimiro cheChemicalCommunications. Kuburikidza nemudzidzi we in situ, vanyori vakashandisa kugoverwa kwechikamu chezvakaoma composite electrode kupisa kusvikira yakaoma composite electrode thermal kunze kwekutonga, uye kuwirirana kwezviitiko zvakasiyana-siyana zvekuparadzaniswa kwechikamu mukuwirirana kusati kwaitika uye shure kwekupisa kwekunze kwakaonekwa.

Kuona. Kurasikirwa kwekupisa kusati kwasvika uye mushure mekuparadzaniswa kwechikamu mune imwe chete electrode particle level inoratidza kusaenzana kusingatarisirwi. Iyi isiri-uniformization uye particle size, crystal surface structure haisi pachena, asi kugoverwa kwemaitiro ekuitisa uye mabhaidhi anonyatsoenderana.

Ino inguva yekutanga kuwana nano visualization yakaparadzaniswa nezvikamu zvakafanana pamberi uye shure kwekupisa kwekupisa, uye kuibatanidza nemamiriro ayo e electrode. Iyi nzira yekuwedzera kudzika maitiro ekupisa kwekushisa kwezvinhu zvakasvibiswa zvakakosha, zvakakodzera kusimudzira kushandiswa kwemaitiro, attenuation mechanism yemamwe electrode masisitimu ekudzidza thermal kunze kwekutonga. Chinyorwa chekutanga chinoshandisa iyo elemental sensitivity yezvinhu zvePEEM zvine chekuita nechikamu che electrode, kusanganisira lithium cobaltate, PVDF, uye kugovera kwemagetsi conductive kabhoni nhema.

Pamberi pekupisa kwekupisa, conductive agent uye binder zvakasanganiswa zvakafanana, asi iyi agglomeration haina kuenzana pamusoro peiyo lithium cobaltate particles uye zvimedu. Kurasikirwa kwekupisa kwePVDF kuri pachena, nepo conductive kabhoni nhema ichiri kugoverwa zvakafanana mu lithium cobalt acid nenzira yeagglomeration. PEEM inogona kusvika pakugadziriswa kwenzvimbo ye100 nm, uye inogona kufananidzwa pa50 um electrode surface.

High spatial resolution uye yakakwirira-imaging interval inowana yakakwirira resolution imaging yeakawanda-particles. Iyo morphology yelithium cobaltate particles inogona kushandiswa kudzidza kudziya kwekuchinja mafambiro eiyo imwechete electrode particles pamberi uye mushure me thermostat. Ikozvino kuwanikwa kwe conductive agents, kugovera kwebhainda kunogona kukonzera lithium-ion bhatiri yakanaka zvinhu zvinopisa kunze-kwe-control diagraph 1.

The elemental distribution and correlation and correlation diagram of after thermostat (A, B) (C, D) yakakamurwa mune imwe neimwe The absorption spectrum ye cobalt element yepixel unit cobalt element inoshandisa chikamu chimwe chete, kusanganisira spectral decomposition fitting ye CO2 + (thermal out-controlled release oxygen formation +), CO3 +3 charge.LCO (LCO) . Kunyanya kusaenzana kwekuparadzaniswa kwechikamu kunoratidzwa muFigure C uye D.

Kana mepu yekupatsanurwa kwechikamu ichiwanikwa neicho chinokonzeresa chimiro, kupatsanurwa kwechikamu ichi kune hukama hukuru nekugoverwa kweiyo conductive kabhoni dema isati yasvika uye mushure mekurasikirwa kwekupisa. Iyo thermostat yakaderedza zvakanyanya ukuru hwekuparadzaniswa kwechikamu. Izvo zvakasiyana nemhedziso dzakawanikwa nemakemikari kuchaja mushure mekuchaja kemikari nemakemikari kuchaja munguva yakapfuura.

Mhedzisiro yezvimedu zve electrode, saizi, uye kutariswa kwekristaro pamusoro ishoma pane nharaunda, kunyanya mhedzisiro ye conductive agent.