Crystal engineering of bimetallic cobalt-based metal-organic framework nanosheets for high-performance aqueous rechargeable cobalt-zinc batteries

Huayu Wang; Jie Bai; Qingqing He; Yanxin Liao; Suna Wang; Lingyun Chen

doi:10.1016/j.jcis.2024.03.123

Crystal engineering of bimetallic cobalt-based metal-organic framework nanosheets for high-performance aqueous rechargeable cobalt-zinc batteries

J Colloid Interface Sci. 2024 Jul:665:172-180. doi: 10.1016/j.jcis.2024.03.123. Epub 2024 Mar 20.

Authors

Huayu Wang¹, Jie Bai¹, Qingqing He¹, Yanxin Liao¹, Suna Wang², Lingyun Chen³

Affiliations

¹ Department of Applied Chemistry, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China.
² Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252000, China. Electronic address: wangsuna@lcu.edu.cn.
³ Department of Applied Chemistry, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China. Electronic address: lychen@cqu.edu.cn.

PMID: 38522157
DOI: 10.1016/j.jcis.2024.03.123

Abstract

Aqueous rechargeable Zn-based batteries (ARZBs) have attracted increasing attention as favorable candidates for energy storage systems due to their high security, environmental friendliness, and abundance of electrode materials. At present, the most widely reported materials used in cobalt-zinc (Co-Zn) batteries are cobalt-based oxides and their derivatives, however, they still exhibit low actual capacities and unsatisfactory cycle lives. Metal-organic frameworks (MOFs), as a new class of porous materials with high specific surface area and adjustable pore size, have attracted considerable attention in the field of energy storage. Currently, pristine MOFs have currently few applications in Co-Zn batteries, and their performance is not ideal. Herein, we report a series of two-dimensional (2D) bimetallic CoM-MOF (M = Ni, Mn, Mg and Cu) nanosheets based on trimesic acid (H₃BTC) ligand as cathodes for alkaline Co-Zn batteries via a simple one-pot hydrothermal synthesis. Among the synthesized MOFs, the CoNi-MOF nanosheets have the best performance, exhibiting a high reversible capacity of 344 mA h g^-1 and demonstrating a good cycling life with 90 % capacity retention at 20 A g^-1 after 1500 cycles. The energy storage mechanism is studied through a series of ex-situ characterizations. This study is of great importance in advancing the application of 2D pristine MOFs for high-performance Co-Zn batteries.

Keywords: Aqueous rechargeable Zn-based batteries; Bimetallic metal–organic frameworks; Cathode materials; Nanosheets; Trimesic acid.