An Iodine‐Chemisorption Binder for High‐Loading and Shuttle‐Free Zn–Iodine Batteries

Abstract Aqueous zinc–iodine (Zn–I 2 ) batteries have attracted considerable research interest as an alternative energy storage system due to their high specific capacity, intrinsic safety, and low cost. However, the notorious shuttle effect of soluble polyiodides causes severe capacity loss and poor electrochemical reversibility, restricting their practical usage. Herein, this study reports a bifunctional binder (polyacrylonitrile copolymer, as known as LA133) with strong iodine‐chemisorption capability for aqueous Zn–I 2 batteries to suppress polyiodide shuttling. From both calculation and experimental data, this study reveals that the amide and carboxyl groups in LA133 binder can strongly bond to…

• UM
  United Mitochondrial Disease Foundation
• NN
  National Natural Science Foundation of China

  Awards: 52202328, 21905051
• UD
  Universidade de Macau

  Awards: MYRG2022-00266-IAPME, MYRG2020-00283-IAPME
• FP
  Fundo para o Desenvolvimento das Ciências e da Tecnologia

  Awards: 0082/2022/A2, 0013/2021/AMJ, 0096/2020/A2
• RS
  Research Services and Knowledge Transfer Office, University of Macau

  Awards: MYRG2022‐00266‐IAPME, MYRG2020‐00283‐IAPME, MYRG‐GRG2023‐00224‐IAPME‐UMDF