Ukuthuthuka okusheshayo kwezimoto zikagesi kanye namadivayisi kagesi anamandla amakhulu kukhulise isidingo esikhulayo samabhethri e-lithium ion ashaja ngokushesha kakhulu. Noma kunjalo, amabhethri ashaja kabusha e-lithium ion amanje ahlushwa ukubola kwamandla okukhulu ngesikhathi sezinqubo zokushaja ngokushesha futhi angase aholele nasekuhlulekeni okubi kakhulu, okuphakamisa izingozi zokuphepha. Lokhu ikakhulukazi kuvela ekungazinzini kwe-electrochemical esibonakalayo se-anode electrolyte, okubangela ukufakwa kwe-lithium yensimbi eyingozi ebusweni bebhethri kanye nokuzinza okungekuhle kokushisa.
Eminyakeni yamuva nje, izinto ze-anode ezinamandla aphezulu ziye zaba ezinye izindlela ezithembisayo kakhulu zokuvimbela ukufakwa kwe-lithium ngokweqile kanye nokwakheka kwezingqimba ze-solid-electrolyte interphase (SEI) ezingazinzile. Naphezu kwala mandla, izinto zesimanje zisakhawulelwe yi-ionic conductivity engagculisi kanye nokuzinza kokushisa, okwenza buthaka ukukhishwa kwamandla kanye nokuthembeka kwesikhathi eside.
Ngokusho kwemibiko yabezindaba zakwamanye amazwe, ukuze kuxazululwe lezi zinkinga, ithimba locwaningo eliholwa nguSolwazi Ohlangene uDongwook Han eSeoul National University of Science and Technology lithuthukise izinto ze-lithium titanium phosphate anode ezingewona i-stoichiometric (OS) ezinesakhiwo se-NASICON. Lezi zinto zaziwa kakhulu ngokuqina kwesakhiwo nokushisa okumangalisayo. Umklamo ungadala ukuguqulwa kwesigaba okuzenzakalelayo ngaphansi kobuso bezinhlayiya zezinto ezisebenzayo ukuze kudlule imikhawulo ye-kinetic futhi kufezwe ukusebenza okuzinzile kokushaja okusheshayo.
Okutholakele kocwaningo olufanele kushicilelwe kumagazini i-Advanced Functional Materials.
Ukuguqulwa Komphezulu Wokuthutha Okusheshayo Kwe-Ion
I-Lithium titanium phosphate (LTP) inesakhiwo sohlobo lwe-sodium superionic conductor (NASICON), esinokuqina okumangalisayo kwesakhiwo nokushisa kanye neziteshi zokusabalalisa ze-lithium ion ezisheshayo. Ukuze basebenzise amandla ayo aphelele, abacwaningi basebenzise isu lokuklama elingekho stoichiometric futhi bakhulisa ngamabomu isilinganiso se-phosphorus (P) ku-titanium (Ti). Ukwakheka okunjalo okuntuleka kwe-titanium kukhiqiza izizinda ze-titanium phosphate (TPO) eduze kobuso bezinhlayiya ze-LTP.
Lezi zindawo ezicebile nge-TPO zisebenza njengeziteshi ze-kinetic ezisebenzayo kakhulu, zehlisa isithiyo samandla sokuthuthwa kwe-lithium ion ku-interface ye-anode electrolyte futhi zakha izindlela zokudlulisa ama-ion ngokushesha eduze kwezindawo zezinhlayiya. Ngaphandle kwalokho, izibopho ze-P‑O‑P eziguquguqukayo kakhulu ngaphakathi kohlaka lwe-TPO zinikeza ukuguquguquka kwesakhiwo ukuze zivumelane nokuguquguquka kwevolumu ngesikhathi semijikelezo yokushaja okusheshayo futhi zivikele isakhiwo sohlobo lwe-NASICON emonakalweni ongenakuguqulwa.
Ukusebenza Okuqinile Ngaphansi Kwezimo Zokushaja Okusheshayo
Ngakho-ke, ekuhlolweni kwamandla esilinganiso, inkomba ebalulekile ehlola amandla okushaja okusheshayo, i-anode ye-OS-LTP-carbon (OS-LTP/C) ehlanganisiwe igcine u-86% ophawulekayo womthamo wayo wokuqala ngaphansi kwesilinganiso sokushaja esingu-10C, kuyilapho amandla e-anode ye-LTP/C ehlanganisiwe ehlanzekile ehle kakhulu.
Lokhu kwaziswa futhi kunikeza ukuzinza okuhle kakhulu kokujikeleza ngemva kwemijikelezo engaphezu kuka-250. Ukucushwa kwamaseli aphelele kubonisa ukusebenza kahle kwesilinganiso esifanayo kanye nokuhambisana okubanzi nama-cathode aphezulu kagesi.
Indlela Ebanzi Eya Emabhethri Aphephile
“Indlela yethu idala indlela entsha sha yokuklama ibhethri lokushaja ngokushesha, futhi ingasetshenziswa kabanzi ezinhlelweni eziningi zokugcina amandla zesikhathi esizayo kufaka phakathi amabhethri aqinile,” kusho uHan. “Leli cebo lokuklama lingenza izimoto zikagesi zibe usizo kakhulu ngokunciphisa isikhathi sokushaja, ukuthuthukisa ukuphepha nokunikeza ukwesekwa kwamagridi kagesi avuselelekayo.”
Ekuphetheni, leli su lokuklama elingekho ngaphansi kwe-stoichiometric libhekana nenye yezithiyo eziyinhloko ezibhekene namabhethri ashajwayo futhi linikeza indlela ethembisayo yobuchwepheshe bokugcina amandla obulungele ukuhweba obushaja ngokushesha okukhulu.
Isikhathi sokuthunyelwe: Agasti-07-2026