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Isithuthi sombane esimelelwe nguTesra sisetyenziselwa ukusebenzisa i-NCA, i-NCM811 okanye i-NCM622 i-nickel-based based material as a lithium ion battery positive material. Nangona kunjalo, le sixhobo se-electrode esine-nickel esiphezulu se-nickel sineengxaki zokhuseleko, iqela lokugcinwa kwamandla okukhanya kweKhanada uGqr Zhou Wei, uGqr.
UWang Jian, uWang Jian, iSikhululo soMfanekiso weMichiza kunye nosekela-profesa weYunivesithi yaseXiamen yeSayensi kunye neTekhnoloji, okokuqala, ukuhanjiswa kwesigaba sobushushu be-electrode composite de i-electrode composite composite ubushushu ngaphandle kolawulo, kunye nokwahlukana kwamanqanaba amaninzi. isenzeko phambi nasemva kokulahlekelwa bubushushu. Ukufaneleka kubonakaliswe yi-nano-level, kwaye kufunyenwe ukuba i-thermal ngaphandle kokulawula inokuthi ihambelane ngokusondeleyo nokusabalalisa abaqhubi kunye nababopheleli. Ibhetri ye-lithium ion emelwe yi-NCA, i-NCM811 okanye i-NCM622 ineenzuzo zomthamo ophezulu, ixabiso eliphantsi, kunye nobungozi bendalo.
Okwangoku, isithuthi sombane esimelelwe nguTesla sisetyenziswa. Nangona kunjalo, kukho ingxaki xa kukho ukhuseleko lwe-nickel ephezulu ene-electrode efanelekileyo, ngakumbi kwiqondo lokushisa eliphantsi lokubola kwezinto, ukukhulula i-oksijini, kubangele ukuphuma kwe-thermal kulawulo, kubangele ukuqhuma kwebhetri. Ukusuka kwimbono yethiyori esisiseko, ukuqonda okunzulu kokuhlukana kwesigaba se-electrode yesimo esiqinileyo phantsi kolawulo lwe-thermal ngaphandle kokulawula kubalulekile ukusombulula ngokusisiseko iziphene zokuzinza kwesi sixhobo se-intrinsic.
Ngokombono wohlalutyo olusebenzayo, indlela yokuziphatha kwesigaba sokufunda yahlulwe kwi-electrode eyi-porous composite eyiyo, kwaye ihambelana nesiphumo sobungakanani bezinto ezintle ze-electrode, ulungelelwaniso phakathi kokulawulwa komphezulu wekristale, kunye nefilimu yokuhambisa umphezulu, sisiseko sophando. kunye nesigaba sokwenziwa kwesicelo. Indlela efanelekileyo edibeneyo. Nangona kunjalo, le ngcamango kufuneka ibe neempawu eziphuculweyo zithetha ukuzaliseka.
UGqr. Zhou Wei, iQela lokuGcinwa koMthombo wokuKhanya waseKhanada, kunye noGqr. Wang Jian kwisikhululo soMfanekiso weMichiza usebenza ngokusondeleyo nosekela njingalwazi wendlela weYunivesithi yeTekhnoloji yeXiamen ukuvelisa ukuskena kweX-ray yezinto kunye ne-orbit. ukukhetha, iikhemikhali kunye nezakhiwo zombane.
I-MicroT (PEEM) isetyenziselwa ukufundisisa ukuziphatha kwesigaba sokuhlukana kwe-thermostatic acid lithium lithium laminate particles kwi-porous electrode. Lo msebenzi uxelwe njengento ebalaseleyo yophando ngendlela yeChemical Communications. Ngomfundi we-in situ, ababhali basebenzise ukuhanjiswa kwesigaba sobushushu obudibeneyo be-electrode de i-electrode composite composite i-thermal iphume kulawulo, kunye nokulungelelaniswa kweziganeko ezahlukeneyo zokwahlulwa kwesigaba kunxibelelaniso ngaphambi nangemva kokuphuma kwe-thermal ngaphandle kolawulo. kubonwa.
Umbono. Ukulahleka kobushushu ngaphambi nangemva kokuhlukana kwesigaba kwinqanaba elilodwa le-electrode particle libonisa ukungalingani okungalindelekanga. Le nto i-non-uniformization kunye ne-particle size, i-crystal surface structure ayibonakali, kodwa ukuhanjiswa kwee-agent conductive kunye nezibophelelo zihambelana ngokusondeleyo.
Eli lixesha lokuqala ukufezekisa i-nano visualization eyahlulwe ngamasuntswana afanayo ngaphambi nangemva kokulahleka kobushushu, kwaye idibanise nendawo yayo ye-electrode. Oku kuthetha ukujula ngakumbi ukuziphatha kwe-thermal displacement ye-laminated material ibalulekile, ifanelekile ukukhuthaza indlela esebenzayo, indlela yokunciphisa ezinye iinkqubo ze-electrode ukufunda i-thermal ngaphandle kolawulo. Inqaku lokuqala lisebenzisa i-elemental sensitivity yezinto ze-PEEM ngokubhekiselele kwi-electrode component, kuquka i-lithium cobaltate, i-PVDF, kunye nokuhanjiswa kwekhabhoni emnyama yombane.
Ngaphambi kokulahleka kobushushu, i-agent eqhubayo kunye ne-binder ixutywe ngokufanayo, kodwa le ngqungquthela ayilingani kumphezulu we-lithium cobaltate particles kunye namasuntswana. Ukulahleka kwe-thermal ye-PVDF kubonakala, ngelixa i-carbon conductive emnyama isasasazwa ngokufanayo kwi-lithium cobalt acid ngendlela ye-agglomeration. I-PEEM inokufikelela kwisisombululo sesithuba se-100 nm, kwaye inomfanekiso womphezulu we-electrode engama-50.
Isisombululo esiphezulu sesithuba kunye nesithuba sokucinga esiphezulu sifikelela kwisisombululo esiphezulu somfanekiso wamasuntswana amaninzi. I-morphology ye-lithium cobaltate particles ingasetyenziselwa ukufundisisa ukuziphatha kwe-thermal displacement ye-electrode efanayo ngaphambi nangemva kwe-thermostat. Ukufunyaniswa kwamva nje kwee-agent ze-conductive, ukuhanjiswa kwe-binder kunokubangela ukuba ibhetri ye-lithium-ion ibe yinto efanelekileyo ye-thermal out-of-control diagram 1.
Ulwabiwo olusisiseko kunye nolungelelwaniso kunye nedayagram yolungelelwaniso emva kwe-thermostat (A, B) (C, D) yahlulwe ibe nganye + (i-thermal out-controlled release release oxygen formation), i-CO3 + (LCO) okanye i-CO3.5 + (i-LCO eqhelekileyo yentlawulo epheleleyo). Ukungalingani okuphezulu kokwahlulwa kwesigaba kubonakaliswe kakuhle kuMfanekiso C no-D.
Ukuba imephu yokwahlukana kwesigaba ifunyenwe kunye neprofayili yesiphumo esibangelwayo, oku kukwahlulwa kwesigaba kunonxibelelwano olukhulu kunye nokuhanjiswa kwekhabhoni eqhubayo emnyama ngaphambi nangemva kokulahleka kwe-thermal. I-thermostat iye yanciphisa kakhulu ubungakanani bokuhlukana kwesigaba. Ihluke kwizigqibo ezifunyenwe ngokutshaja kweekhemikhali emva kokutshaja kweekhemikhali ngokutshaja kweekhemikhali kwixesha elidlulileyo.
Iimpembelelo ze-electrode particles, ubungakanani, kunye ne-crystal surface orientation ingaphantsi kakhulu kune-particulate environment, ngakumbi umphumo we-agent conductive.
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