电力科技与环保2024，Vol.40Issue(3)：258-265,8.DOI:10.19944/j.eptep.1674-8069.2024.03.005
金属有机骨架衍生CoS2/NC作为高性能钠离子电池负极的研究
Metal-organic skeleton derived CoS2/NC as ultra-high anode for sodium-ion batteries
摘要
Abstract
The increasing energy depletion and growing demand make the development of anode materials for sodium ion batteries urgent. Transition metal sulfides are of great interest because of their high theoretical specific capacity,and they are abundant and inexpensive,which help reduce costs,but there are problems such as structural degradation caused by volume changes during redox. Therefore,the study of anode materials with excellent performance for sodium ion batteries has become the focus of research. Cobalt sulfide particles confined in a relatively rigid matrix can effectively limit the volume expansion. In this paper,the metal-organic skeleton ZIF-67 was prepared by the solvothermal method,and then the nitrogen-doped CoS2 nanoparticles (CoS2/NC) were synthesized by high-temperature carbonization and sulfidation reaction using ZIF-67 as the precursor. They were tested by X-ray diffraction and other research methods to reveal the sodium storage mechanism of CoS2/NC. The results show that the CoS2/NC negative electrode material has a very high specific capacity and good cycling stability,and its specific capacity reaches 599.6 mAh/g at 0.06 A/g current density,and can still maintain a high capacity of 455.4 mAh/g after 500 cycles at 1200 mA/g current density. In addition,the smaller electrochemical impedance and higher capacitance contribution ensure the excellent multiplicative performance of the electrode material and the cycling performance at high current density. The strategy is simple to operate,significantly improved and widely applied,and has a broad application prospect in sodium ion batteries. The CoS2/NC electrode exhibits excellent sodium storage performance and is expected to be the next generation of high-performance anode material. The modification strategy is simple and effective,and can be widely used in other electrochemical energy storage devices.关键词
CoS2/NC复合材料/钠离子电池/负极材料/电化学性能/金属有机框架Key words
CoS2/NC composite/sodium ion batteries/anode material/electrochemical properties/metal organic frame分类
能源科技引用本文复制引用
傅世郑,安鹏燕,董默涵,王舒冉,杨浩,王子丹,边煜华,刘朝孟..金属有机骨架衍生CoS2/NC作为高性能钠离子电池负极的研究[J].电力科技与环保,2024,40(3):258-265,8.基金项目
国家自然科学基金项目(52204308) （52204308）
中国博士后科学基金项目(ZX20220158) （ZX20220158）
辽宁省自然科学基金项目(2023-MSBA-101). （2023-MSBA-101）
