Kambani yebhatiri inhibisa matatu mhinduro kune lithium titanate yakaipa kuwedzera

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Lithium titanate (Li4TI5O12 inowanzozivikanwa seLTO) boka remuchadenga ndere FD3M, spinel chimiro, nekuda kweyayo matatu-dimensional lithium ion diffusion chiteshi, ine zvakanakira seyakanakisa simba maitiro uye yakakwirira uye yakaderera tembiricha kuita. Panguva imwecheteyo, iyo lithium titanate crystal structure inogona kuchengetedza yakakwira dhigirii yekudzikama vhoriyamu mu lithium ion deinterlaxation isingasviki 1%, inova yakakosha negative electrode zvinhu kugadzira chinhu chakakosha. Zvinotonyanya kukosha, njodzi yekuchengetedza bhatiri inobviswa, inonzi yakachengeteka lithium ion bhatiri negative electrode zvinhu.

Iyo yemuviri chimiro chelithium titanate chakakodzera se lithium ion bhatiri negative electrode zvinhu, saka chii chiri maitiro ayo emagetsi? Kana ichienzaniswa nekabhoni negative electrode zvinhu, iyo lithium titanate inogona yakakwira, inova 1.55VVSLI +/li, iyo theoretical kugona ye175mAh / g, iyo yakavhurika yedunhu voltage 2.4V, iyo simba density uye voltage platform yakaderera.

Iyo lithium titanate ion bhatiri ine zvakanakira kuchengetedzwa kwepamusoro, iyo inogona kubhadharwa kwenguva yakareba, uye urefu hwehupenyu hwekutenderera hwakareba. Kunyangwe kudzidza kwe lithium titanate ion bhatiri kuzvimba hakuna kumbomira, kusanganisira kabhoni cladding modification, hybridization, nanochem, asi flatulence yayo ichiri kugadziriswa zvachose, ichitadzisa kushambadzira kwekushambadzira kwe lithium titanate ion mabhatiri. I.

Iyo lithium-yakavakirwa ion bhatiri flatulence michina inoonekwa seyakanyanya kukonzera lithium titanate / NCM bhatiri. Liquid reaction. Munguva yekuchajisa uye kuburitsa, iyo electrolyte inogara ichibata pamusoro peLi4Ti5O12, zvichikonzera kuenderera kuderera kwe electrolyte pamusoro peLi4Ti5O12 zvinhu, izvo zvinogona kunge zviri izvo zvinokonzeresa Li4Ti5o12 bhatiri flatulence.

Chinhu chakakosha chegasi H2, CO2, CO, CH4, C2H6, C2H4, C3H8, nezvimwe. Apo lithium titanate yakanyudzwa zvakasiyana mu electrolyte, chete CO2 inoitika, uye mushure mokunge zvinhu zveNCM zvagadzirirwa mubhatiri, gasi rinoitika muH2, CO2, CO, uye zvishoma zvishoma zvegasi hydrocarbons, uye mushure mekugadzirwa, chete pakutenderera Kana mutero uchichajwa, H2 ichaitika, uye gasi muH2 inodarika 5%. Izvi zvinoratidza kuti H2 uye CO gasi ichaonekwa panguva yekuchaja uye kubuda.

LiPF6 iripo mu electrolyte: PF5 iasidhi yakasimba kwazvo, iri nyore kukonzera kuora kwecarbonate, uye huwandu hwePF5 hunowedzera nekupisa. PF5 inobatsira mukuora kwe electrolyte, CO2, CO uye CXHY magasi. Maererano nezvidzidzo zvakakodzera, mvura yekutsvaga kubva ku electrolyte inotorwa kubva mumvura inoyerera mu electrolyte, asi mvura inowanikwa mu electrolyte yakawanda inenge 20 × 10-6, uye kugadzirwa kweH2 kwakaderera zvikuru.

Kuedza kweShanghai Jiaotong University Wu Kai kwakashandiswa sebhatiri regraphite / NCM111. Mhedziso yakagumisa kuti kwakabva H2 ndiko kuparara kwecarbonate pasi pemhepo yakakwirira. Chechipiri, iyo lithium titanate ion bhatiri flatulence inhibits mhinduro ye lithium titanate lithium-ion bhatiri flatulence, zvitatu, kutanga, LTO negative electrode material processing modification, kusanganisira yakagadziridzwa nzira yekugadzirira uye kugadziriswa kwepamusoro, nezvimwewo.

, yechipiri, kuvandudza uye Electrolytic mhinduro dzinoenderana neLTO isina kunaka, kusanganisira additives, solvent systems; chechitatu, kunatsiridza bhatiri process technology. (1) Kuvandudza kuchena kwezvinhu zvakasvibirira uye kudzivirira kuiswa kwetsvina panguva yekugadzira. Kusachena zvidimbu hazvizongokonzeresa magasi emagetsi emagetsi, asi zvakare kuderedza zvakanyanya kushanda, kutenderera hupenyu uye kuchengetedzeka kwemabhatiri e-lithium-ion, saka vanofanirwa kuderedza kuiswa kwetsvina mumabhatiri zvakanyanya sezvinobvira.

(2) Lithium titanate pamusoro pekuvhara nanocarbon zvimedu. Chikonzero chakajeka cheiyo negative electrode LTO inogadzira gasi ndeyekuti iyo SEI firimu inononoka, ishoma, zvichikonzera chiitiko icho chiitiko chinoperekedzwa nehupenyu hwayo. Chidzidzo ichi chakawana kuti iyo yekuzviparadzanisa layer inotangwa pakati pelithium titanate uye electrolyte interface (yakadai sekugadzira nanocarbon coating mu lithium titanate pamusoro (LTO / C), yakasimba electrolyte interface (SEI) firimu rakaumbwa pamusoro coating layer.

Chimiro, kuderedza nzvimbo yekubatana yeLTO zvinhu uye electrolyte, kudzivirira kuitika kwegasi. Kune rimwe divi, iyo kabhoni pachayo inogona kuratidza kushomeka kweLTO, uku ichiwedzerawo conductivity yeLTO zvinhu. Mhedzisiro yetsvagiridzo iri pamusoro ine kukosha kwakakosha kugadzirisa kugadzirwa kwe lithium titanate ion mabhatiri, dhizaini uye chiyero chekushandisa uye kusimudzira simba repamusoro-titanate-based lithium bhatiri uye budiriro yakasimudzira.

(3) Kuvandudza kushanda kwe electrolyte. Panyaya yekuvandudzwa kweelectrolyte itsva, patents dzakawanda dzinoshandiswa kushandisa chiwedzeredzo kufambisa kuumbwa kwefirimu rakakora SEI pamusoro peLTO kudzvanyirira kuitika kweLTO uye electrolyte interface. Zvimwe zvekuwedzera kwe electrolyte, zvakadai se fluorinated carbonates uye phosphates, zvinofambisa kuumbwa kwefirimu yakagadzikana yeSEI pamusoro peiyo electrode yakanaka, kuderedza kuparara kwepamusoro pesimbi ions ye electrode yakanaka, nokudaro kuderedza kuitika kwegesi.

Iyo firimu inogadzira additive inogonawo kudzivisa kuwanda kwekugadzirwa kwegasi, iyo firimu yakagadzirika yekuwedzera yakawedzerwa inonzi lithium borate munyu, butadiamonlonitrile kana hexonitrile, R-CH = N2 chimiro (umo R iri C1 kusvika kuC8 alkyl kana phenyl) ), Cyclic phosphate, phenyl derivative, phenylerivative, LIF. (4) Positive surface coating. Yakavharwa yakagadzikana makomisheni pamusoro peiyo yakanaka electrode, senge alumina, kana zvimwe, inogona kuvharisa simbi ions.

Nekudaro, iyo yakanyanya kuomesesa cladding kuti inhibit lithium ion deinterlating, inokanganisa electrochemical zvimiro zvezvinhu. (5) Kuvandudza kugadzirwa kwebhatiri. Kana bhatiri ragadzirwa, humidity yezvakatipoteredza inodzorwa, uye nzira yekushandisa mvura inounzwa.

Kubva pachikonzero chegasi, zvinonzwisiswa kuti mvura iri mumhepo uye yakanaka electrode zvinhu zvinogadzirisa zvinoumba lithium carbonate uye inomhanyisa kuora kwe electrolyte, uye inogadzira carbon dioxide. Kupfuurirazve, iyo lithium titanate zvinhu pachayo ine mvura yakasimba kwazvo yekunyura (kushanda mukamuri yakaoma), uye iyo yakaipa electrode sheet inotora unyoro uye iyo PF5 reaction inoitika mukudzoreredzwa kweiyo electrolyte mukudzoreredza, saka kudzora mwando kwakakosha.