A montmorillonite-modification strategy enabling long cycling stability of dual-ion batteries

Gen Li; Huanwen Wang; Xiaojun Shi; Caihong Yang; Rui Wang; Beibei He; Jun Jin; Yansheng Gong; Aidong Tang; Huaming Yang

doi:10.1039/d2cc04552d

A montmorillonite-modification strategy enabling long cycling stability of dual-ion batteries

Chem Commun (Camb). 2022 Oct 6;58(80):11276-11279. doi: 10.1039/d2cc04552d.

Authors

Gen Li¹, Huanwen Wang^{1

2}, Xiaojun Shi¹, Caihong Yang^{1

2}, Rui Wang¹, Beibei He¹, Jun Jin¹, Yansheng Gong¹, Aidong Tang^{1

2

3}, Huaming Yang^{1

2

3

4}

Affiliations

¹ Engineering Research Center of Nano-Geomaterials of Ministry of Education, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, China. wanghw@cug.edu.cn.
² Key Laboratory of Functional Geomaterials in China Nonmetallic Minerals Industry, China University of Geosciences, Wuhan, China.
³ College of Chemistry and Chemical Engineering, Central South University, Changsha, China.
⁴ Hunan Key Lab of Mineral Materials and Application, School of Minerals Processing and Bioengineering, Central South University, Changsha, China. hmyang@csu.edu.cn.

PMID: 36124676
DOI: 10.1039/d2cc04552d

Abstract

Lithium‖graphite dual-ion batteries (DIBs) have received widespread attention due to their low cost and high operating voltage (nearly 5 V). However, DIBs face several challenges such as decomposition of the electrolyte under high voltage and structural deterioration of graphite. Herein, montmorillonite (MMT) is employed to generate a favorable and robust cathode electrolyte interface (CEI) layer on the graphite surface. As a result, the DIBs exhibit a 100% capacity retention for 500 cycles at 2C. Even after 1000 cycles at 5C, the capacity retention is still as high as 99%.