阳极
纳米片
材料科学
电化学
电池(电)
电极
X射线光电子能谱
阴极
锌
兴奋剂
化学工程
电偶阳极
热液循环
纳米技术
光电子学
化学
冶金
阴极保护
物理化学
功率(物理)
工程类
物理
量子力学
作者
Mengwei Han,Yuzhu Qian,Xinni Li,Nailiang Wang,Ting Song,Li Liu,Xianyou Wang,Xiongwei Wu,Man‐Kay Law,Yexiang Tong
标识
DOI:10.1016/j.jcis.2023.04.121
摘要
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.
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