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Armoring the cathode with starch gel enables Shuttle-Free Zinc-Iodine batteries.
Wang, Na; Ma, Yuanyuan; Chang, Yunzhen; Feng, Liping; Liu, Huichao; Li, Boqiong; Li, Wanxi; Liu, Yanyun; Han, Gaoyi.
Afiliación
  • Wang N; Department of Materials Science and Engineering, Jinzhong University, Jinzhong 030619, China.
  • Ma Y; Department of Energy Chemistry and Materials Engineering, Shanxi Institute of Energy, Jinzhong 030600, China. Electronic address: mayy@sxie.edu.cn.
  • Chang Y; Institute of Molecular Science, Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Key Laboratory of Chemical Biology and Molecular Engineering of Education Ministry, Shanxi University, Taiyuan 030006, China.
  • Feng L; Institute of Molecular Science, Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Key Laboratory of Chemical Biology and Molecular Engineering of Education Ministry, Shanxi University, Taiyuan 030006, China.
  • Liu H; Institute of Molecular Science, Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Key Laboratory of Chemical Biology and Molecular Engineering of Education Ministry, Shanxi University, Taiyuan 030006, China.
  • Li B; Department of Materials Science and Engineering, Jinzhong University, Jinzhong 030619, China.
  • Li W; Department of Materials Science and Engineering, Jinzhong University, Jinzhong 030619, China.
  • Liu Y; Department of Materials Science and Engineering, Jinzhong University, Jinzhong 030619, China. Electronic address: 312217642@qq.com.
  • Han G; Institute of Molecular Science, Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Key Laboratory of Chemical Biology and Molecular Engineering of Education Ministry, Shanxi University, Taiyuan 030006, China; Institute for Carbon-Based Thin Film Electronics, Peking Uni
J Colloid Interface Sci ; 665: 491-499, 2024 Jul.
Article en En | MEDLINE | ID: mdl-38537593
ABSTRACT
Zinc-iodine batteries (ZIBs) have been recognized as a promising energy storage device due to their high energy density, low cost and environmental friendliness. However, the development of ZIBs is hindered by the shuttle effect of polyiodides which results in capacity degradation and poor cycling performance. Inspired by the ability of starch to form inclusion compounds with iodine, we propose to use a starch gel on the cathode to suppress the shuttle of polyiodides. Herein, porous carbon is utilized as a host for iodine species and provides an excellent conductive network, while starch gel is used as another host to suppress polyiodides shuttle, resulting in improved battery performance. The test results demonstrate that the conversion between I-/I2/I3- in the cathode and the effective inclusion role of starch suppress the shuttle of polyiodides during the charging process. Meanwhile, based on the electrochemical tests and theoretical DFT calculations, it is found that starch has a stronger ability to adsorb polyiodides compared to carbon materials, which enables effective confinement of polyiodides. The ZIBs used the cathode with starch gel exhibit high coulombic efficiency (>95 % at 0.2 A/g) and low self-discharge (86.8 % after resting for 24 h). This strategy is characterized by its simplicity, low cost and high applicability, making it significant for the advancement of high-performance ZIBs.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Colloid Interface Sci Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Colloid Interface Sci Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Estados Unidos