Ngomhla zingama-21 ku-Aug, uProf. MA Cheng ovela eNyuvesi Yesayensi Nobuchwepheshe YaseShayina (i-USTC) nabahlanganyeli bakhe bahlongoza isu elisebenzayo lokubhekana nenkinga yokuxhumana ye-electrode-electrolyte ekhawulela ukuthuthukiswa kwamabhethri e-List state esizukulwaneni esilandelayo. I-electrode eyinhlanganisela eqinile eqinile idale ngale ndlela ibonise amakhono akhethekile kanye nokusebenza kwezinga.
Ukushintsha i-organic liquid electrolyte kumabhethri avamile e-Li-ion ngama-electrolyte aqinile kungadambisa kakhulu izinkinga zokuphepha, futhi kungase kuphule “usilingi wengilazi” ukuze kuthuthukiswe ukuminyana kwamandla. Kodwa-ke, izinto ezijwayelekile ze-electrode nazo ziyizinto eziqinile. Njengoba ukuthintana phakathi kwezinto eziqinile ezimbili kucishe kungenzeki ukuba kusondelelane njengalokho okuphakathi kokuqinile noketshezi, okwamanje amabhethri asekelwe kuma-electrolyte aqinile ngokuvamile abonisa ukuthintana okungalungile kwe-electrolyte kanye nokusebenza okungagculisi kweseli eligcwele.
"Inkinga yokuxhumana ye-electrode-electrolyte yamabhethri e-solid-state ifana nenduku emfushane kakhulu yombhobho wokhuni," kusho uProf. MA Cheng wase-USTC, umbhali oholayo wocwaningo. "Empeleni, kule minyaka abacwaningi sebevele benze ama-electrode amaningi amahle kakhulu nama-electrolyte aqinile, kodwa ukuxhumana okungekuhle phakathi kwabo kusanciphisa ukusebenza kahle kwezokuthutha kwe-Li-ion."
Ngenhlanhla, isu le-MA lingase linqobe le nselele enkulu. Ucwaningo lwaqala ngokuhlolwa kwe-athomu-by-athomu kwesigaba sokungcola ku-prototype, i-electrolyte eqinile eyakhiwe nge-perovskite. Nakuba isakhiwo sekristalu sasihluke kakhulu phakathi kokungcola kanye ne-electrolyte eqinile, zabonwa ukuze zenze i-epitaxial interfaces. Ngemuva kochungechunge lokuhlaziywa okuningiliziwe kwesakhiwo namakhemikhali, abacwaningi bathola ukuthi isigaba sokungcola siyingxenye ye-isostructural nama-electrode anengqimba e-Li-rich anamandla amakhulu. Okusho ukuthi, i-electrolyte eyisibonelo eqinile ingacwebezela “kusifanekiso” esakhiwe uhlaka lwe-athomu lwe-electrode esebenza kahle kakhulu, okuholela ekuxhumaneni okuseduze kwe-athomu.
"Lokhu kuyamangaza ngempela," kusho umbhali wokuqala u-LI Fuzhen, okwamanje ongumfundi oneziqu ze-USTC. “Ukuba khona kokungcola endabeni empeleni kuyisenzakalo esivame kakhulu, esivame kakhulu kangangokuthi isikhathi esiningi ngeke sishaywe indiva. Nokho, ngemva kokubukisisa, sathola lokhu kuziphatha okungalindelekile kwe-epitaxial, futhi kwaphefumulela ngokuqondile isu lethu lokuthuthukisa ukuthintana okuqinile.”
Uma kuqhathaniswa nendlela evame ukwamukelwa yokucindezela okubandayo, isu elihlongozwe abacwaningi lingakwazi ukubona ukuthintana okuphelele, okungenazihibe phakathi kwama-electrolyte aqinile nama-electrode esikalini se-athomu, njengoba kuboniswa esithombeni se-electron microscopy yokuxazulula i-athomu.（Kunikezwe ithimba le-MA.)
Besebenzisa lesi senzakalo esibonwe, abacwaningi bahlobisa ngamabomu impushana ye-amorphous enokwakheka okufanayo njenge-electrolyte eqinile eyakhiwe nge-perovskite ebusweni benhlanganisela ye-Li-rich layered compound, futhi baqaphela ngempumelelo ukuxhumana okuphelele, okungenamthungo phakathi kwalezi zinto ezimbili eziqinile ku-electrode eyinhlanganisela. Ngodaba lokuxhumana le-electrolyte esilungisiwe, i-electrode eyinhlanganisela eqinile ilethe amandla esilinganiso acishe aqhathaniswe nalawo avela ku-electrode eyinhlanganisela ewuketshezi oluqinile. Okubaluleke nakakhulu, abacwaningi baphinde bathola ukuthi lolu hlobo lokuxhumana okuqinile kwe-epitaxial lungabekezelela ukungafani okukhulu kwe-lattice, futhi ngaleyo ndlela isu abalihlongozayo lingase lisebenze kwamanye ama-electrolyte amaningi aqinile e-perovskite nama-electrode anezingqimba.
“Lo msebenzi uveze isiqondiso okufanele silandelwe,” kusho u-MA. “Ukusebenzisa isimiso esivezwe lapha kwezinye izinto ezibalulekile kungaholela ekusebenzeni okungcono kakhulu kwamangqamuzana nesayensi ethakazelisa kakhudlwana. Sikulindele ngabomvu.”
Abacwaningi bahlose ukuqhubeka nokuhlola kwabo kulokhu, futhi basebenzise isu elihlongozwayo kwamanye ama-cathodes aphezulu, aphezulu.
Ucwaningo lushicilelwe ku-Matter, iphephabhuku elihamba phambili le-Cell Press, elinesihloko esithi "Atomically Intimate Contact between Solid Electrolytes and Electrodes for Li Batteries". Umbhali wokuqala ngu-LI Fuzhen, umfundi oneziqu ze-USTC. Abahlanganyeli bakaProf. MA Cheng bahlanganisa uProf. NAN Ce-Wen waseTsinghua University kanye noDkt. ZHOU Lin wase-Ames Laboratory.
(Isikole Sekhemistry kanye Nesayensi Yezinto Ezibalulekile)
Isixhumanisi sephepha: https://www.cell.com/matter/fulltext/S2590-2385(19)30029-3
Isikhathi sokuthumela: Jun-03-2019