Kupita patsogolo mwachangu kwa magalimoto amagetsi ndi zida zamagetsi zamagetsi zamphamvu kwambiri kwawonjezera kufunikira kwakukulu kwa mabatire a lithiamu ion omwe amachaja mwachangu kwambiri. Komabe, mabatire omwe amachajanso a lithiamu ion omwe alipo pano amavutika ndi kuwonongeka kwamphamvu kwambiri panthawi yochaja mwachangu ndipo angayambitse kulephera kwakukulu, komwe kumabweretsa zoopsa zachitetezo. Izi makamaka zimachokera ku kusakhazikika kwa ma electrochemical pa anode electrolyte interface, zomwe zimayambitsa kuyika kwa lithiamu yachitsulo pamalo a batri komanso kusakhazikika kwa kutentha.
M'zaka zaposachedwapa, zipangizo za anode zamphamvu kwambiri zakhala njira zina zabwino kwambiri zoletsera kuyika kwa lithiamu yambiri komanso kupanga zigawo zosasunthika za solid electrolyte interphase (SEI). Ngakhale zili ndi mphamvu zimenezi, zipangizo zamakono zikadali zochepa chifukwa cha kusakwanira kwa ma ionic conductivity ndi kukhazikika kwa kutentha, zomwe zimafooketsa kutulutsa mphamvu komanso kudalirika kwa nthawi yayitali.
Malinga ndi malipoti a atolankhani akunja, kuti athetse mavutowa, gulu lofufuza lotsogozedwa ndi Pulofesa Wothandizira Dongwook Han ku Seoul National University of Science and Technology lapanga chinthu chosakhala cha stoichiometric (OS) lithium titanium phosphate anode chokhala ndi kapangidwe ka NASICON. Chinthuchi chimadziwika bwino chifukwa cha kukhazikika kwa kapangidwe kake komanso kutentha. Kapangidwe kake kangayambitse kusintha kwadzidzidzi pansi pa tinthu tating'onoting'ono tomwe timagwira ntchito kuti tidutse zoletsa za kinetic ndikukwaniritsa magwiridwe antchito okhazikika achangu.
Zotsatira za kafukufuku wofunikira zasindikizidwa mu magazini ya Advanced Functional Materials.
Kusintha kwa Malo Oyendera Ma Ion Mofulumira
Lithium titanium phosphate (LTP) ili ndi kapangidwe ka sodium superionic conductor (NASICON), komwe kali ndi kukhazikika kwa kapangidwe kake komanso kutentha komanso njira zofalitsira mwachangu za lithiamu ion. Kuti agwiritse ntchito mphamvu zake zonse, ofufuza adagwiritsa ntchito njira yopangira zinthu zomwe sizili zokhazikika ndipo mwadala adawonjezera chiŵerengero cha phosphorous (P) ndi titanium (Ti). Kapangidwe kotere ka titanium kosowa kamapanga titanium phosphate (TPO) madera pafupi ndi pamwamba pa tinthu ta LTP.
Madera olemera a TPO awa amagwira ntchito ngati njira zoyendetsera bwino kwambiri zamagetsi, kuchepetsa mphamvu zotchingira lithiamu ion kudutsa mawonekedwe a anode electrolyte ndikupanga njira zotumizira ma ion mwachangu pafupi ndi malo a tinthu. Kupatula apo, ma bond a P‑O‑P osinthasintha kwambiri mkati mwa chimango cha TPO amapereka kusinthasintha kwa kapangidwe kake kuti azitha kusintha kusinthasintha kwa voliyumu panthawi yoyendetsa mwachangu ndikuteteza kapangidwe ka mtundu wa NASICON ku kuwonongeka kosasinthika.
Kugwira Ntchito Kolimba Pa Nthawi Yochaja Mofulumira
Motero, mu mayeso a mphamvu ya liwiro, chizindikiro chofunikira chomwe chimayesa mphamvu ya kuyitanitsa mwachangu, anode ya OS-LTP-carbon (OS-LTP/C) composite anode idasunga 86% ya mphamvu yake yoyamba pansi pa 10C charger rate, pomwe mphamvu ya anode ya LTP/C composite anode yoyambirira idatsika kwambiri.
Zinthuzi zimathandizanso kuti kayendedwe kabwino kayendetsedwe ...
Njira Yokulirapo Yopita ku Mabatire Otetezeka
"Njira yathu imapanga njira yatsopano yopangira mabatire ochaja mwachangu, ndipo ingagwiritsidwe ntchito kwambiri pamakina ambiri osungira mphamvu mtsogolo kuphatikiza mabatire olimba," adatero Han. "Njira yopangirayi ingapangitse magalimoto amagetsi kukhala othandiza kwambiri pochepetsa nthawi yochaja, kukonza chitetezo ndikupereka chithandizo cha ma gridi amagetsi obwezerezedwanso."
Pomaliza, njira yopangirayi yosagwirizana ndi stoichiometric imayang'ana chimodzi mwa zopinga zazikulu zomwe mabatire omwe amachajidwanso amakumana nazo ndipo imapereka njira yabwino yogwiritsira ntchito ukadaulo wosungira mphamvu mwachangu kwambiri wokonzeka kugulitsidwa.
Nthawi yotumizira: Ogasiti-07-2026