Gulu lofufuza motsogozedwa ndi Prof. CHEN Wei ku University of Science and Technology of China (USTC) lakhazikitsa njira yatsopano ya batri yamankhwala yomwe imagwiritsa ntchito gasi wa hydrogen ngati anode. Phunzirolo linasindikizidwa muAngewandte Chemie International Edition.
Hyrojeni (H2) yapeza chidwi ngati chonyamulira champhamvu chokhazikika komanso chotsika mtengo chifukwa cha zabwino zake zama electrochemical. Komabe, mabatire achikhalidwe opangidwa ndi haidrojeni amagwiritsa ntchito H2ngati cathode, yomwe imalepheretsa kuchuluka kwa ma voltage awo ku 0.8-1.4 V ndikuchepetsa mphamvu zawo zonse zosungira mphamvu. Pofuna kuthana ndi malirewo, gulu lofufuza lidapereka njira yatsopano: kugwiritsa ntchito H2monga anode kuti apititse patsogolo kachulukidwe kamphamvu komanso voteji yogwira ntchito. Ikaphatikizidwa ndi chitsulo cha lithiamu ngati anode, batire imawonetsa magwiridwe antchito a electrochemical.
Schematic ya batri ya Li-H. (Chithunzi ndi USTC)
Ofufuzawo adapanga mawonekedwe a batri a Li-H, kuphatikiza lithiamu chitsulo anode, wosanjikiza wopaka mpweya wa platinamu womwe umakhala ngati hydrogen cathode, ndi electrolyte yolimba (Li1.3Al0.3Ti1.7(PO4)3kapena LATP). Kukonzekera uku kumathandizira kuyendetsa bwino kwa lithiamu ion ndikuchepetsa kusagwirizana kwa mankhwala. Kupyolera mu kuyezetsa, batire ya Li-H inawonetsa mphamvu zongoyerekeza za 2825 Wh / kg, ndikusunga voteji yokhazikika yozungulira 3V. Kuphatikiza apo, idachita bwino kwambiri paulendo wozungulira (RTE) wa 99.7%, kuwonetsa kuchepa kwa mphamvu pang'ono panthawi yolipiritsa ndi kutulutsa, ndikusunga bata kwanthawi yayitali.
Kuti apititse patsogolo kutsika mtengo, chitetezo ndi kupanga kuphweka, gululi linapanga batri ya Li-H yopanda anode yomwe imathetsa kufunika kwa zitsulo za lithiamu zomwe zimayikidwa kale. M'malo mwake, batire imayika lithiamu kuchokera ku mchere wa lithiamu (LiH2PO4ndi LiOH) mu electrolyte pa kulipiritsa. Mtunduwu umasungabe zabwino za batire ya Li-H yokhazikika pomwe ikubweretsa zina zowonjezera. Imathandizira kuti lithiamu plating ndi kuvula bwino kwa Coulombic (CE) ya 98.5%. Kuphatikiza apo, imagwira ntchito mosasunthika ngakhale m'malo otsika kwambiri a haidrojeni, kuchepetsa kudalira kwambiri kusungirako kwa H₂. Ma computational modelling, monga mafanizidwe a Density Functional Theory (DFT), adachitidwa kuti amvetsetse momwe ma lithiamu ndi ma hydrogen ion amasunthira mkati mwa electrolyte ya batri.
Kupambana kumeneku muukadaulo wa batri wa Li-H kumapereka mwayi watsopano wopeza mayankho opitilira mphamvu osungira mphamvu, omwe atha kukhala ndi ma grid amagetsi ongowonjezedwanso, magalimoto amagetsi, komanso ukadaulo wapamlengalenga. Poyerekeza ndi mabatire wamba wa nickel-hydrogen, makina a Li-H amapereka mphamvu zowonjezera mphamvu komanso kuchita bwino, ndikupangitsa kuti ikhale yoyenera kusungirako mphamvu ya m'badwo wotsatira. Mtundu wopanda anode umayala maziko a mabatire otsika mtengo komanso owopsa a hydrogen.
Ulalo wa Papepala:https://doi.org/10.1002/ange.202419663
(Wolemba ZHENG Zihong, Wosinthidwa ndi WU Yuyang)
Nthawi yotumiza: Mar-12-2025