Iqela lophando elikhokelwa nguProf. CHEN Wei kwiYunivesithi yeSayensi kunye neTekhnoloji yaseChina (USTC) uye wazisa inkqubo entsha yebhetri yeekhemikhali esebenzisa igesi ye-hydrogen njenge-anode. Uphononongo lwapapashwa kwiAngewandte Chemie International Edition.
IHydrojeni (H2) uye wafumana ingqwalasela njengomphathi we-energy ezinzile kunye nexabiso elisebenzayo ngenxa yezinto ezithandekayo ze-electrochemical. Nangona kunjalo, iibhetri zemveli ezisekwe kwi-hydrogen zisebenzisa i-H2njenge-cathode, ethintela uluhlu lwamandla ombane ukuya kwi-0.8-1.4 V kunye nokunciphisa amandla abo okugcina amandla. Ukoyisa umda, iqela lophando licebise indlela entsha: kusetyenziswa i-H2njenge-anode yokwandisa kakhulu ukuxinana kwamandla kunye nombane osebenzayo. Xa idityaniswe nentsimbi ye-lithium njenge-anode, ibhetri ibonise ukusebenza okubalaseleyo kwe-electrochemical.
Schematic yebhetri ye-Li−H. (Umfanekiso ngu-USTC)
Abaphandi bayila iprototype ye-Li-H yebhetri yenkqubo, ebandakanya i-lithium metal anode, iplatinam-coated gas diffusion layer esebenza njenge-hydrogen cathode, kunye ne-electrolyte eqinileyo (Li1.3Al0.3Ti1.7(PO4)3, okanye LATP). Olu lungelelwaniso luvumela ukuthuthwa kwe-lithium ion esebenzayo ngelixa kuncitshiswa ukusebenzisana kweekhemikhali ezingafunekiyo. Ngovavanyo, ibhetri ye-Li-H ibonise ubuninzi bamandla obungqingqwa be-2825 Wh / kg, igcina i-voltage eqhubekayo malunga ne-3V. Ukongezelela, ifumene ukuphumelela okuphawulekayo kohambo olujikelezayo (RTE) lwe-99.7%, ebonisa ukulahlekelwa kwamandla amancinci ngexesha lokutshaja kunye nokukhupha imijikelezo, ngelixa ligcina ukuzinza kwexesha elide.
Ukuqhubela phambili ukuphucula iindleko, ukhuseleko kunye nokulula ukwenza, iqela liphuhlise i-anode-free ye-Li-H ibhetri ephelisa imfuno ye-lithium efakwe ngaphambili. Endaweni yoko, ibhetri ifaka i-lithium kwiityuwa ze-lithium (LiH2PO4kunye ne-LiOH) kwi-electrolyte ngexesha lokutshaja. Inguqulelo igcina izibonelelo zebhetri yeLi-H esemgangathweni ngelixa ingenisa izibonelelo ezongezelelweyo. Yenza i-lithium plating esebenzayo kunye nokuhluthwa ngokucokisekileyo kweCoulombic (CE) ye-98.5%. Ngaphezu koko, isebenza ngokuzinzileyo nakwiindawo ezisezantsi ze-hydrogen, inciphisa ukuthembela kuxinzelelo oluphezulu lokugcina lwe-H₂. Imodeli yokubala, njenge-Density Functional Theory (DFT) ukulinganisa, kwenziwa ukuqonda indlela i-lithium kunye ne-hydrogen ion ezihamba ngayo ngaphakathi kwe-electrolyte yebhetri.
Oku kuphumeleleyo kwitekhnoloji yebhetri ye-Li-H kuveza amathuba amatsha ezisombululo zogcino lwamandla aphezulu, kunye nezicelo ezinokubakho ezithatha iigridi zamandla ahlaziyekayo, izithuthi zombane, kunye nobuchwephesha be-aerospace. Xa kuthelekiswa neebhetri eziqhelekileyo ze-nickel-hydrogen, inkqubo ye-Li-H ihambisa ingxinano yamandla eyongeziweyo kunye nokusebenza kakuhle, iyenza ibe ngumgqatswa oqinileyo wokugcinwa kwamandla kwisizukulwana esilandelayo. I-anode-free version ibeka isiseko seebhetri ezisekelwe kwi-hydrogen engabizi kakhulu kunye ne-scalable.
Ikhonkco lePhepha:https://doi.org/10.1002/ange.202419663
(Ibhalwe ngu ZHENG Zihong, ihlelwe ngu WU Yuyang)
Ixesha lokuposa: Mar-12-2025