I-Seoul Tech Iphuhlisa Icebo Elitsha Lokutshaja Ibhetri Ngokukhawulezisa Kakhulu Ukuthintela Ukuchithwa KweLithium Okuyingozi

Ukuqhubela phambili ngokukhawuleza kwezithuthi zombane kunye nezixhobo ze-elektroniki ezinamandla aphezulu kuye kwabangela imfuno ekhulayo yeebhetri ze-lithium ion ezitshaja ngokukhawuleza. Nangona kunjalo, iibhetri ze-lithium ion zangoku zitshaja ngokukhawuleza zinengxaki yokubola kwamandla ngexesha leenkqubo zokutshaja ngokukhawuleza kwaye zinokukhokelela ekusileleni okukhulu, nto leyo ebangela umngcipheko wokhuseleko. Oku ikakhulu kuvela ekungazinzini kwe-electrochemical kwi-anode electrolyte interface, okubangela ukubekwa kwe-lithium yesinyithi eyingozi kumphezulu webhetri kunye nokuzinza okungekuhle kobushushu.
Kwiminyaka yakutshanje, izinto ze-anode ezine-voltage ephezulu ziye zaba zezona ndlela zithembisayo zokuthintela ukufakwa kwe-lithium eninzi kunye nokwenziwa kwee-layers eziqinileyo ze-electrolyte interphase (SEI) ezingaguqukiyo. Nangona la mandla, izinto ezisemgangathweni ophezulu zisathintelwa kukuqhuba kwe-ionic okunganelisiyo kunye nokuzinza kobushushu, okunciphisa amandla okukhupha kunye nokuthembeka kwexesha elide.

Ngokweengxelo zeendaba zamanye amazwe, ukuze kusonjululwe ezi ngxaki, iqela lophando elikhokelwa nguNjingalwazi oNcedisayo uDongwook Han kwiYunivesithi yeSizwe yeSayensi neTekhnoloji yaseSeoul liphuhlise izinto ze-anode ze-lithium titanium phosphate ezingasebenziyo (OS) ezinesakhiwo se-NASICON. Ezi zinto zaziwa kakhulu ngokuzinza okumangalisayo kwesakhiwo kunye nobushushu. Uyilo lunokubangela utshintsho oluzenzekelayo lwesigaba phantsi komphezulu wee-particles zezinto ezisebenzayo ukuze zidlule kwimida ye-kinetic kwaye zifezekise ukusebenza okuzinzileyo kokutshaja ngokukhawuleza.
Iziphumo zophando ezifanelekileyo zipapashwe kwijenali ethi Advanced Functional Materials.

Ukuguqulwa komphezulu woThutho oluKhawulezayo lwe-Ion

I-Lithium titanium phosphate (LTP) inesakhiwo sohlobo lwe-sodium superionic conductor (NASICON), esine-stability ebalaseleyo yesakhiwo kunye nobushushu kunye neendlela ezikhawulezayo zokusasazwa kwe-lithium ion. Ukuze basebenzise amandla ayo apheleleyo, abaphandi basebenzise icebo loyilo olungekho stoichiometric kwaye ngabom bonyusa umlinganiselo we-phosphorus (P) kwi-titanium (Ti). Olu hlobo lolwakhiwo olungenalo i-titanium luvelisa i-titanium phosphate (TPO) kufutshane nomphezulu wee-LTP particles.
Ezi ndawo zityebileyo ze-TPO zisebenza njengeendlela ze-kinetic ezisebenzayo kakhulu, zinciphisa umqobo wamandla wokuthutha i-lithium ion kwi-anode electrolyte interface kwaye zakha iindlela zokudlulisa i-ion ezikhawulezayo kufutshane neendawo ezinamasuntswana. Ngaphandle koko, iibhondi ze-P‑O‑P eziguquguqukayo kakhulu ngaphakathi kwesakhelo se-TPO zibonelela ngokuguquguquka kwesakhiwo ukuze zilungelelanise nokuguquguquka kwevolumu ngexesha lemijikelo yokutshaja ngokukhawuleza kwaye zikhusele isakhiwo sohlobo lwe-NASICON kumonakalo ongenakuguqulwa.

Ukusebenza Okuqinileyo phantsi kweemeko zokutshaja ngokukhawuleza

Ngoko ke, kwiimvavanyo zobuchule besantya, uphawu olubalulekileyo oluvavanya amandla okutshaja ngokukhawuleza, i-anode ye-OS-LTP-carbon (OS-LTP/C) composite anode igcine i-86% ephawulekayo yomthamo wayo wokuqala phantsi kwesantya sokutshaja se-10C, ngelixa amandla e-anode ye-LTP/C composite anode ecocekileyo yehla kakhulu.
Le nto ikwabonelela ngozinzo oluhle kakhulu lokuhamba ngebhayisikile emva kwemijikelo engaphezu kwama-250. Uqwalaselo lweeseli ezipheleleyo lubonisa ukusebenza okuhle kakhulu kunye nokuhambelana okubanzi nee-cathodes ze-voltage ephezulu.

Indlela ebanzi eya kwiibhetri ezikhuselekileyo

“Indlela yethu idala indlela entsha yoyilo lwebhetri yokutshaja ngokukhawuleza, kwaye ingasetyenziswa ngokubanzi kwiinkqubo ezininzi zokugcina amandla kwixesha elizayo kuquka neebhetri eziqinileyo,” utshilo uHan. “Olu cwangciso loyilo lunokwenza izithuthi zombane zibe luncedo ngakumbi ngokunciphisa ixesha lokutshaja, ukuphucula ukhuseleko kunye nokubonelela ngenkxaso kwiigridi zamandla avuselelekayo.”
Ukuqukumbela, eli cebo loyilo olungekho semgangathweni lijongana nomnye wemiqobo ephambili ejongene neebhetri ezinokutshajwa kwaye libonelela ngendlela ethembisayo yetekhnoloji yokugcina amandla etshaja ngokukhawuleza elungele urhwebo.