Ni-doped Bi2O2CO3 nanosheet with H+/Zn2+ co-insertion for "rocking chair" zinc-ion battery

Mengwei Han; Yuzhu Qian; Xinni Li; Nailiang Wang; Ting Song; Li Liu; Xianyou Wang; Xiongwei Wu; Man-Kay Law; Bei Long

doi:10.1016/j.jcis.2023.04.121

Ni-doped Bi₂O₂CO₃ nanosheet with H⁺/Zn²⁺ co-insertion for "rocking chair" zinc-ion battery

J Colloid Interface Sci. 2023 Sep:645:483-492. doi: 10.1016/j.jcis.2023.04.121. Epub 2023 Apr 28.

Authors

Mengwei Han¹, Yuzhu Qian¹, Xinni Li¹, Nailiang Wang², Ting Song¹, Li Liu¹, Xianyou Wang¹, Xiongwei Wu³, Man-Kay Law⁴, Bei Long⁵

Affiliations

¹ School of Chemistry, Xiangtan University, Xiangtan 411105, China.
² State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan, Ningxia 750021, China.
³ School of Chemistry and Materials Science, Hunan Agricultural University, Changsha 410128, China.
⁴ State Key Laboratory of Analog and Mixed-Signal VLSI, University of Macau, 999078, Macau. Electronic address: MKLaw@um.edu.mo.
⁵ School of Chemistry, Xiangtan University, Xiangtan 411105, China; State Key Laboratory of Analog and Mixed-Signal VLSI, University of Macau, 999078, Macau. Electronic address: longbei@xtu.edu.cn.

PMID: 37156157
DOI: 10.1016/j.jcis.2023.04.121

Abstract

Developing insertion-type anode is key to advancing "rocking chair" zinc-ion batteries, though there are few reported insertion-type anodes. Herein, the Bi₂O₂CO₃ is a high-potential anode, with a special layered structure. A one-step hydrothermal method was used to prepare Ni-doped Bi₂O₂CO₃ nanosheet, and also a free-standing electrode consisting of Ni-Bi₂O₂CO₃ and CNTs was designed. Both cross-linked CNTs conductive networks and Ni doping improve charge transfer. Ex situ tests (XRD, XPS, TEM, etc.) reveal the H⁺/Zn²⁺ co-insertion mechanism of Bi₂O₂CO₃ and that Ni doping improves its electrochemical reversibility and structural stability. Therefore, this optimized electrode offers a high specific capacity of 159 mAh g^-1 at 100 mA g^-1, a suitable average discharge voltage of ≈0.400 V, and a long-term cycling stability of 2200 cycles at 700 mA g^-1. Besides, the Ni-Bi₂O₂CO₃//MnO₂ "rocking chair" zinc-ion battery (based on the total mass of cathode and anode) delivers a high capacity of ≈100 mAh g^-1 at 50.0 mA g^-1. This work provides a reference for designing high-performance anode in zinc-ion batteries.