High-adhesion anionic copolymer as solid-state electrolyte for dendrite-free Zn-ion battery

作     者：Jiaxu Li Junfeng Ren Caixia Li Pengxian Li Tingting Wu Shiwei Liu Lei Wang Jiaxu Li;Junfeng Ren;Caixia Li;Pengxian Li;Tingting Wu;Shiwei Liu;Lei Wang

作者机构：State Key Laboratory Base of Eco-chemical EngineeringTaishan Scholar Advantage and Characteristic Discipline Team of Eco-chemical Process and TechnologyQingdao University of Science and TechnologyQingdao 266042China College of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042China College of Environment and Safety EngineeringQingdao University of Science and TechnologyQingdao 266042China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2022年第15卷第8期

页      面：7190-7198页

核心收录：

学科分类：07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 070305[理学-高分子化学与物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：the National Natural Science Foundation of China(Nos.51802171 and 52072197) Outstanding Youth Foundation of Shandong Province,China(No.ZR2019JQ14) Taishan Scholar Young Talent Program(No.tsqn201909114) Major Basic Research Program of Natural Science Foundation of Shandong Province(No.ZR2020ZD09). 

主　　题：copolymer adhesion ionic conductivity dendrite-free interface kinetics 

摘      要：To conquer severe dendrites formation and side reactions of zinc metal anodes,which are serious obstacles for the practical applications of aqueous zinc ion battery(ZIB),herein,we develop a sodium allysulfonate(SAS)and acrylamide(AM)copolymer by radical polymerization process(crosslinking of C=C)as solid-state electrolyte.The interface kinetics is improved remarkably due to the high adhesion and excellent ion transferability of AM-SAS(AS)copolymers.Especially the sulfonic acid group in the hydrogel electrolyte can enhance the internal ionic conductivity effectively benefiting from its high affinity to Zn^(2+).Also,polymer chains realize re-regulation to Zn^(2+)flow in atomic-scale,thus leading to controllable deposition of Zn onto the dendrite-free Zn anodes.Consequently,the AS-1.5 electrolyte achieves ultra-stable Zn deposition/stripping behaviors with the lifespan over 1,000 h via the suppression of side-reactions and paralleled Zn deposition.High performances of Zn/Mn-doped V_(2)O_(5)(MnVO)(over 500 cycles)and Zn/diquinoxalino[2,3-a:2 ,3 -c]phenazine(HATN)(over 2,500 cycles)full cells demonstrate that the AS hydrogel electrolyte is a common approach for ZIBs under various conditions.This molecular regulation engineering opens a novel route for hydrogel electrolyte fabrication,where sulfonic groups perform as media of Zn^(2+)transfer.Therefore,high bulk ionic conductivity as well as excellent interface ion diffusion ability is obtained.