Indawo lapho kusetshenziswa khona ibhethri le-polymer lithium nayo ibaluleke kakhulu ekuthonyeni impilo yomjikelezo wayo. Phakathi kwazo, izinga lokushisa elizungezile liyisici esibaluleke kakhulu. Izinga lokushisa elizungezile eliphansi kakhulu noma eliphakeme kakhulu lingathinta impilo yomjikelezo wamabhethri e-Li-polymer. Ezisetshenzisweni zebhethri lamandla kanye nezinhlelo zokusebenza lapho izinga lokushisa liyithonya elikhulu, ukuphathwa kokushisa kwamabhethri e-Li-polymer kuyadingeka ukuthuthukisa ukusebenza kahle kwebhethri.

Izimbangela zokushintsha kwezinga lokushisa langaphakathi lebhethri le-Li-polymer

NgobaAmabhethri e-Li-polymer, ukukhiqizwa kokushisa kwangaphakathi ukushisa kokusabela, ukushisa kwe-polarization kanye nokushisa kwe-Joule. Esinye sezizathu eziyinhloko zokwanda kwezinga lokushisa kwebhethri le-Li-polymer ukwanda kwezinga lokushisa okubangelwa ukumelana kwangaphakathi kwebhethri. Ngaphezu kwalokho, ngenxa yokubekwa okuxinene komzimba weseli elishisayo, isifunda esiphakathi nakanjani sizoqoqa ukushisa okwengeziwe, kanti isifunda somphetho sincane, okwandisa ukungalingani kwezinga lokushisa phakathi kwamaseli ngamanye ebhethri le-Li-polymer.

Izindlela zokulawula izinga lokushisa kwebhethri le-polymer lithium

1. Ukulungiswa kwangaphakathi

Inzwa yokushisa izobekwa endaweni emele kakhulu, ushintsho olukhulu kakhulu lokushisa endaweni, ikakhulukazi izinga lokushisa eliphakeme kakhulu neliphansi kakhulu, kanye nendawo ephakathi nendawo yokuqoqa ukushisa kwebhethri le-polymer lithium enamandla kakhulu.

1. Umthethonqubo wangaphandle

Ukulawulwa kokupholisa: Njengamanje, uma sibheka ubunzima besakhiwo sokuphathwa kokushisa kwamabhethri e-Li-polymer, iningi lawo lisebenzisa isakhiwo esilula sendlela yokupholisa umoya. Futhi uma sibheka ukufana kokusatshalaliswa kokushisa, iningi lawo lisebenzisa indlela yokungenisa umoya efanayo.

1. Ukulawulwa kwezinga lokushisa: isakhiwo sokushisa esilula kakhulu ukufaka amapuleti okushisa phezulu nangaphansi kwebhethri le-Li-polymer ukuze kuqaliswe ukushisa, kukhona umugqa wokushisa ngaphambi nangemva kwebhethri ngalinye le-Li-polymer noma ukusetshenziswa kwefilimu yokushisa egoqwe nxazonkeIbhethri le-Li-polymeryokushisa.

Izizathu eziyinhloko zokwehla kwamandla amabhethri e-lithium polymer emazingeni okushisa aphansi

1. Ukuhanjiswa kwe-electrolyte okungekuhle, ukumanzisa okungekuhle kanye/noma ukungena kahle kwe-diaphragm, ukuhamba kancane kwama-ion e-lithium, izinga lokudlulisa ishaja elihamba kancane endaweni yokuxhumana ye-electrode/electrolyte, njll.

2. Ngaphezu kwalokho, ukuvinjelwa kwe-membrane ye-SEI kuyanda emazingeni okushisa aphansi, kunciphisa izinga lama-ion e-lithium adlula ku-interface ye-electrode/electrolyte. Esinye sezizathu zokwanda kokuvinjelwa kwefilimu ye-SEI ukuthi kulula ngama-ion e-lithium ukuphuma ku-electrode engemihle emazingeni okushisa aphansi futhi kunzima kakhulu ukuwafaka.

3. Uma ishaja, i-lithium metal izovela bese isabela ne-electrolyte ukuze yakhe ifilimu entsha ye-SEI ukuze imboze ifilimu yokuqala ye-SEI, okwandisa ukuvimba kwebhethri ngaleyo ndlela kubangele ukuthi amandla ebhethri ehle.

Ukushisa okuphansi ekusebenzeni kwamabhethri e-lithium polymer

1. izinga lokushisa eliphansi ekusebenzeni kokushaja nokukhipha

Njengoba izinga lokushisa lehla, i-voltage evamile yokukhipha kanye nomthamo wokukhipha weamabhethri e-lithium polymerziyancipha, ikakhulukazi uma izinga lokushisa lingu-20 ℃, amandla okukhipha ibhethri kanye ne-voltage evamile yokukhipha ibhethri kwehla ngokushesha.

2. Izinga lokushisa eliphansi ekusebenzeni komjikelezo

Umthamo webhethri ubola ngokushesha ku--10℃, futhi umthamo uhlala u-59mAh/g kuphela ngemva kwemijikelezo eyi-100, kanye nokubola komthamo okungu-47.8%; ibhethri elikhishwe emazingeni okushisa aphansi lihlolwa emazingeni okushisa asekamelweni ukuze lishaje futhi likhiphe, futhi ukusebenza kokubuyiselwa komthamo kuyahlolwa phakathi naleso sikhathi. Umthamo walo ubuyiselwe ku-70.8mAh/g, kanye nokulahlekelwa komthamo okungu-68%. Lokhu kukhombisa ukuthi umjikelezo wokushisa ophansi webhethri unomthelela omkhulu ekubuyiselweni komthamo webhethri.

3. Umthelela ophansi wokushisa ekusebenzeni kokuphepha

Ukushaja ibhethri le-polymer lithium inqubo yama-ion e-lithium aphuma ku-electrode enhle ngokusebenzisa ukufuduka kwe-electrolyte okufakwe ezintweni ezingezinhle, ama-ion e-lithium aye ku-polymerization ye-electrode engezinhle, ngama-athomu ayisithupha ekhabhoni athatha i-ion ye-lithium. Emazingeni okushisa aphansi, umsebenzi wokusabela kwamakhemikhali uyancishiswa, kuyilapho ukufuduka kwama-ion e-lithium kuba kancane, ama-ion e-lithium ebusweni be-electrode engezinhle engakafakwa ku-electrode engezinhle ancishisiwe abe yi-lithium metal, kanye nokuna kwemvula ebusweni be-electrode engezinhle ukuze kwakheke ama-dendrite e-lithium, angabhoboza kalula i-diaphragm okubangela i-short circuit ebhethrini, okungalimaza ibhethri futhi kubangele izingozi zokuphepha.

Okokugcina, sisafuna ukukukhumbuza ukuthi amabhethri e-lithium polymer kungcono angashajwa ebusika emazingeni okushisa aphansi, ngenxa yokushisa okuphansi, ama-ion e-lithium afakwe ku-electrode engemihle azokhiqiza amakristalu e-ion, abhoboze ngqo i-diaphragm, okuvame ukubangela isekethe encane emfushane ethinta impilo nokusebenza, ukuqhuma okuqondile okukhulu. Ngakho-ke abanye abantu babonisa ukuthi i-polymer yasebusika ayikwazi ukushajwa, lokhu kungenxa yengxenye yohlelo lokuphatha ibhethri ngenxa yokuvikelwa komkhiqizo.