An aqueous rechargeable Fe//LiMn_(2)O_()hybrid battery with superior electrochemical performance beyond mainstream Fe-based batteries  

作　　者：Yu Liu Dehui Xie Yuxin Shi Rongguan Lv Yingna Chang Yuzhen Sun Zhiyuan Zhao Jindi Wang Kefan Song Huayu Wu Tuan K.A.Hoang Rong Xing Huan Pang 

机构地区：[1]Institute of New Energy on Chemical Storage and Power Sources,School of Chemical and Environmental Engineering,Yancheng Teachers University,Yancheng 224000,China [2]School of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225009,China [3]Department of Chemical Engineering,University of Waterloo,200 University Avenue West,Waterloo,Ontario N2L 3G1,Canada

出　　处：《Nano Research》2024年第6期5168-5178,共11页纳米研究（英文版）

基　　金：Jiangsu Natural Science Foundation Youth Fund Project(No.BK20220700);Jiangsu Province Industry University Research Cooperation Project(No.BY20221063);Project of Natural Science Research in Colleges and Universities of Jiangsu Province(Nos.21KJD150004 and 23KJB480010);Jiangsu Province Education Department Major Project(Nos.19KJA140003 and 21KJA530004);Key R&D Plan(Social Development)Project of Yancheng Science and Technology Bureau(No.YCBE202243).

摘　　要：Aqueous rechargeable batteries(ARBs)are generally safer than non-aqueous analogues,they are also less-expensive,and more friendly to the environment.However,the inherent disadvantage of the narrow electrochemical window of H2O seriously restricts the energy density and output voltage of ARBs,especially aqueous rechargeable Fe-based batteries.Herein,we introduce a new battery system:the anode contains C@Fe/Fe_(2)O_(3)composite,which is interfaced with an alkaline electrolyte;the cathode contains LiMn_(2)O_()in contact with a neutral electrolyte.A Li^(+)-conducting membrane is carefully selected to decouple the electrode-electrolyte,which effectively widens the electrochemical window to above 2.65 V,thereby enables an aqueous rechargeable iron battery.Its average output voltage is 1.83 V and its energy density is 235.3 Wh/kg at 549 W/kg.In this work,we propose the energy storage mechanism with the aid of density functional theory(DFT).The calculated reduction potential of the anode agrees with the experimental value.Furthermore,this battery system demonstrates long cycle lifespan of approximately 2500 cycles at 2 A/g,corresponding to a capacity retention of 82.1%.These results are very far superior than those of mainstream aqueous rechargeable Fe-based batteries,which guarantee future investigation for storing electricity energy.

关 键 词：aqueous battery high voltage high energy iron oxide theoretical calculation 

分 类 号：O646.1[理学—物理化学] TM912[理学—化学]