Advanced high-voltage and super-stable sodium-zinc hybrid ion batteries enabled by a hydrogel electrolyte  

作　　者：Debin Kong Xinru Wei Jinshu Yue Changzhi Ji Jianhang Yang Guanzhong Ma Xia Hu Wenting Feng Changming Mao Zhongtao Li Linjie Zhi 

机构地区：[1]College of New Energy,China University of Petroleum(East China),Qingdao 266580,China [2]College of Chemistry and Chemical Engineering,China University of Petroleum(East China),Qingdao 266580,China [3]College of Materials Science and Engineering,Qingdao University of Science&Technology,Qingdao 266042,China [4]Advanced Chemical Engineering and Energy Materials Research Center,China University of Petroleum(East China),Qingdao 266580,China

出　　处：《Energy Materials and Devices》2024年第4期55-65,共11页能源材料与器件(英文)

基　　金：financially supported by National Key Research and Development Program of China(Grant No.2022YFE0127400);Taishan Scholar Project of Shandong Province(Grant Nos.ts202208832 and tsqnz20221118);National Natural Science Foundation of China(Grant No.52473285);Shandong Provincial Natural Science Foundation(Grant No.21CX06028A).

摘　　要：Aqueous secondary batteries are promising candidates for next-generation large-scale energy storage systems owing to their excellent safety and cost-effectiveness.However,their commercialization faces considerable challenges owing to a limited electrochemical stability window and lower energy density.In this study,we present a rationally designed hydrogel electrolyte,featuring a distinctive polymer network and reduced free water content,created using a UV-curing method.This innovation results in an impressive ionic conductivity of 43 mS cm^(-1),high mechanical strength and an enhanced electrochemical stability window of up to 2.5 V(vs.Zn/Zn^(2+)).The hybrid electrolyte demonstrates impressive viability and versatility,enabling compatibility with various cathode materials for use in both aqueous Na–Zn hybrid batteries and Zn-ion batteries.Notably,when paired with a Prussian blue cathode,the assembled hybrid batteries show remark-able cyclability,enduring over 6000 cycles with a minimal capacity decay of only 0.0096%per cycle at a high current density of 25 C.Additionally,the Zn||Na_(2)MnFe(CN)_(6) full battery using the synthesized hydrogel elec-trolyte achieves a high energy density of approximately 220 Wh kg^(-1) and outstanding rate performance reach-ing up to 5 C.This research provides important insights for designing aqueous hybrid electrolytes that combine both high ionic conductivity and an expansive electrochemical stability window.

关 键 词：ELECTROCHEMISTRY sodium-zinc hybrid ion battery hydrogel electrolyte aqueous secondary batteries 

分 类 号：TM9[电气工程—电力电子与电力传动]