摘要
不同的制备方法会使V_(2)O_(5)的结构存在差异。共沉淀法、溶胶-凝胶法为层状结构,而水热法为纳米棒状结构,探究其不同形貌对锌离子电池电化学性能的影响。结果表明:由共沉淀法制备的V_(2)O_(5)结晶度最好,具有良好的可逆性。在电流密度为1.0A/g的循环测试中,由水热法、溶胶-凝胶法和共沉淀法制备的V_(2)O_(5)的全电池初始放电比容量分别为225.5mAh/g、205.6mAh/g和178.5mAh/g。在阻抗测试中,由水热法、溶胶-凝胶法和共沉淀法制备的V_(2)O_(5)的全电池的电荷转移电阻分别为93.2Ω、318.7Ω和70.1Ω,共沉淀法的反应动力学性能最好。
The structure of V_(2)O_(5) differs depending on the preparation method.The co-precipitation and sol-gel methods produce a layered structure,while the hydrothermal method yields a nanorod structure.The effect of their different morphologies on the electrochemical performance of zinc-ion batteries was investigated.The results showed that V_(2)O_(5) prepared by the co-precipitation method exhibited the best crystallinity and good reversibility.In cycling tests at a current density of 1.0A/g,the initial discharge specific capacities of the full batteries with V_(2)O_(5) prepared by hydrothermal,sol-gel and co-precipitation methods were 225.5mAh/g,205.6mAh/g and 178.5mAh/g,respectively.In impedance tests,the charge transfer resistances of the V_(2)O_(5) full cells prepared by the hydrothermal,sol-gel,and co-precipitation methods were 93.2Ω,318.7Ω,and 70.1Ω,respectively,with the co-precipitation method showing the best reaction kinetics performance.
作者
赵世杰
王佳璇
武龙坤
薄清玮
李硕
朱靖
何章兴
Zhao Shijie;Wang Jiaxuan;Wu Longkun;Bo Qingwei;Li Shuo;Zhu Jing;He Zhangxing(College of Chemical Engineering,North China University of Science and Technology,Tangshan 063210)
出处
《化工新型材料》
北大核心
2025年第S2期439-444,共6页
New Chemical Materials
基金
中央引导地方科技发展资金项目(自由探索类基础研究)(246Z4414G)。
关键词
水系锌离子电池
五氧化二钒
共沉淀法
溶胶-凝胶法
水热法
aqueous zinc-ion battery
V_(2)O_(5)
co-precipitation method
sol-gel method
hydrothermal method
