Ukushaja ukunwetshwa kwe-anode yebhethri ye-lithium kunzima ukunqoba indlela entsha ye-United States neqembu lase-China R <000000> D

ଲେଖକ: ଆଇଫ୍ଲୋପାୱାର - Портативті электр станциясының жеткізушісі

Ngokwemibiko yabezindaba yakwamanye amazwe, njengoba i-silicon inomthamo omkhulu wamandla, isiphenduke into ekhangayo kakhulu ye-lithium-ion yebhethri ye-anode. Kodwa-ke, ngesikhathi sokushaja, ukuncipha kokunwetshwa kungafinyelela ku-300% lapho i-silicon esitokisini isebenzisana ne-lithium. Futhi ngokuhamba kwesikhathi, kuzonciphisa kakhulu ukusebenza, ukujikeleza okufushane kwebhethri, futhi ekugcineni kuholele ekulahlekeni kwebhethri.

Ukuze kuthuthukiswe okubi okungenhla futhi ngokuvamile kugcinwe ukuminyana kwamandla ebhethri, i-anode yebhethri ye-lithium-ion okwamanje isetshenziswa kusetshenziswa i-silicon monoxide (SiOx, X≈1). Ukusetshenziswa kwe-silicon-based oxide anode kuphezulu kakhulu, nokusebenza komjikelezo nakho kuyathuthukiswa. Kodwa-ke, izinto ezisetshenziswayo namanje azikuvimbeli ukushintsha kwevolumu, futhi ukuqhutshwa okubuthakathaka akunamandla.

Inani elikhulu lomsebenzi wocwaningo lwenziwe ukubhekana nezinkinga zobuchwepheshe ezingenhla. Namuhla, ithimba labacwaningi ezweni lami nase-United States lishicilele imiphumela yocwaningo futhi lathola izindlela ezimbili zokuthuthukisa. Imiphumela yocwaningo yeqembu lase-US: I-non-adhesive silica oxide / carbon complex Kentucky University (UNIVERSITYE) ithimba labacwaningi Ngemva kokuxuba izinhlayiya ze-silicon-based oxide kanye ne-kraftlignin, ukuhlanganiswa kokusebenza okuphezulu okungahlanganisiwe kwe-Silicon-based oxide / carbon complex (Binder-freesiox / c) yokwenza ama-electrode amabhethri e-lithium ion.

Ngemuva kokwelashwa kokushisa, i-lignin yakha umzimba oqhubayo (i-ConductiveMatrix), ongamumatha izinhlayiya eziningi ze-silicon-based oxide ukuze kuqinisekiswe ukuhanjiswa kwe-elekthronikhi, ukuxhumana, nokuzivumelanisa nokusabela kwe-lithiation / deodentation ngesikhathi se-lithiation / Delithiation. Ukushintsha kwevolumu. Lokhu okuqukethwe akudingi ukusebenzisa ama-binder noma ama-conductor avamile.

Ukusebenza kwe-electrode eyenziwe ngezinto ezihlanganisiwe kuhle kakhulu. Uma kuqhathaniswa ne-silicon-based oxide electrode encane (160%) yezinga lokushintsha ivolumu, izakhiwo zemishini kagesi zinhle kakhulu, i-ferbonmatrix inkulu, futhi ingashintshwa ukuze ishintshe ivolumu. Imiphumela yocwaningo lwethimba lethu: I-Micro SiOx / C Cabens (Core-Shell) Inhlanganisela yethimba labacwaningi bezwe lami lenze ikhambi eliphumelelayo lokulungisa inkimbinkimbi yegobolondo eliwumgogodla we-SiOx / C.

Iqembu locwaningo elixube i-citricacid kanye ne-silicon-based oxide yokugaya ibhola lenze ikhabhoni, lilandelwa ukwakheka kwegobolondo le-SiOx / C-core - SiOx micro core kanye ne-citrate carbon CONFORMALCARBONSHELL. Igobolondo lekhabhoni likhulise kakhulu ukuqhutshwa kukagesi kwama-silicon-based oxides, kanye noshintsho lwevolumu ekujwayelaneni ne-lithiuming / deod lithium reaction. Ama-electrode enziwe yi-SiOx / C complex angama-1296.

3mAh / g, kanye ne-COMBICEFFICIENCY iphezulu kakhulu njenge-99.8%, futhi izinga lokugcinwa kwamandla ngu-65.1% (843.

5mAh / g) ngemuva kokushaja nokukhishwa izikhathi ezingama-200. Ngokusho kwethimba locwaningo, ukusebenza kahle kokukhishwa kwenkimbinkimbi kuhle kakhulu. Indlela ingafinyelela ukukhiqizwa ngobuningi, okungabizi kakhulu, kungakhiqiza izinto ezisezingeni eliphezulu ze-anode ezenziwe ngezinhlanganisela eziyinkimbinkimbi ze-SiOx / C.