Ubuchwephesha bokugcina amandla obucocekileyo nobusebenzayo bubalulekile ekusekeni isiseko samandla ahlaziyekayo.Iibhetri ze-lithium-ion sele zilawula kwizixhobo zombane zomntu, kwaye zithembisa abaviwa bokugcinwa kwegridi ethembekileyo kunye nezithuthi zombane.Nangona kunjalo, uphuhliso olongezelelweyo luyafuneka ukuphucula amaxabiso abo okutshaja kunye nobomi obusebenzisekayo.
Ukunceda uphuhliso lweebhetri ezitshaja ngokukhawuleza kwaye zihlala ixesha elide, izazinzulu kufuneka zikwazi ukuqonda iinkqubo ezenzeka ngaphakathi kwebhetri esebenzayo, ukuchonga imida ekusebenzeni kwebhetri.Okwangoku, ukujonga izinto zebhetri esebenzayo njengoko zisebenza kufuna ubucukubhede be-synchrotron X-ray okanye ubuchule be-electron microscopy, obunokuba nzima kwaye bubize kakhulu, kwaye kaninzi awukwazi ukwenza umfanekiso ngokukhawuleza ngokwaneleyo ukuze ubambe utshintsho olukhawulezayo olwenzeka kwizixhobo ze-electrode ezitshaja ngokukhawuleza.Ngenxa yoko, i-ion dynamics kumlinganiselo wobude beengqungquthela ezisebenzayo zomntu ngamnye kunye namazinga okutshaja ngokukhawuleza ahambelana norhwebo ahlala engahlolisiswanga.
Abaphandi kwiYunivesithi yaseCambridge bayoyisile le ngxaki ngokuphuhlisa i-lab-based optical microscopy ubuchule bokufunda ibhetri ye-lithium-ion.Bavavanye amasuntswana e-Nb14W3O44, ephakathi kwezinto ezikhawulezayo zokutshaja i-anode ukuza kuthi ga ngoku.Ukukhanya okubonakalayo kuthunyelwa kwibhetri ngefestile encinci yeglasi, evumela abaphandi ukuba bajonge inkqubo eguquguqukayo ngaphakathi kweengqungquthela ezisebenzayo, ngexesha langempela, phantsi kweemeko ezingenakulinganiswa.Oku kutyhilwe ngaphambili njenge-lithium-concentration gradients ehamba ngamasuntswana asebenzayo, okukhokelela kuxinzelelo lwangaphakathi olubangele ukuba ezinye iincinci ziqhekeke.I-particle fracture yingxaki yeebhetri, kuba inokukhokelela ekuqhawulweni kombane kwamaqhekeza, ukunciphisa umthamo wokugcina ibhetri."Ezi ziganeko zizenzekeleyo zinefuthe elibi kwibhetri, kodwa azinakuze zibonwe ngexesha lokwenyani ngaphambili," utshilo uGqirha Christoph Schnedermann, ovela kwiCavendish Laboratory yaseCambridge.
Izakhono eziphezulu zobuchule be-optical microscopy zenza ukuba abaphandi bahlalutye inani elikhulu leengqungquthela, bebonisa ukuba ukuchithwa kwe-particle kuxhaphake kakhulu kunye namazinga aphezulu okutshatyalaliswa kunye namaqhekeza amade."Ezi ziphumo zibonelela ngokuthe ngqo kwimigaqo yoyilo yokunciphisa ukuphuka kwamasuntswana kunye nokuphelelwa amandla kolu didi lwezixhobo" utsho umbhali wokuqala u-Alice Merryweather, umviwa we-PhD kwi-Cambridge's Cavendish Laboratory kunye neSebe leKhemistry.
Ukuqhubela phambili, iingenelo eziphambili zemethodology - kubandakanywa ukufunyanwa kwedatha ngokukhawuleza, isisombululo se-single-particle, kunye nobuchule obuphezulu be-output - kuya kwenza ukuphononongwa okuqhubekayo okwenzekayo xa iibhetri zihluleka kunye nendlela yokuthintela.Ubuchwephesha bunokusetyenziswa ekufundeni phantse naluphi na uhlobo lwemathiriyeli yebhetri, nto leyo eyenza ukuba ibe sisiqwenga esibalulekileyo sepuzzle ekuphuhlisweni kweebhetri zesizukulwana esilandelayo.
Ixesha lokuposa: Sep-17-2022