摘要
采用溶胶-凝胶自蔓延燃烧法制备锂离子电池纳米Co3O4负极材料,利用XRD、SEM和充放电测试等手段表征了不同的原料比和热处理温度对材料的结构、颗粒形貌和电化学性能的影响。实验表明:硝酸钴和柠檬酸摩尔比为1∶2,400℃空气气氛下热处理制备的Co3O4材料表现出良好的电化学性能。首次可逆容量为1121.4 m Ahg-1,循环30次后可逆容量仍能高达865.3 m Ahg-1,容量保持率约为77.2%。
The Co3O4 anode material was synthesized via the sol-gel auto-combustion method. The effects of the molar ratio of raw materials and the heat-treatment temperature on the phase composition, the particle morphology, structure and the electrochemical performance of the prepared Co3O4 composites were investigated by SEM, XRD and charge-discharge tests. The result shows that the Co3O4 nanoparticles prepared at the cobalt nitrate/citric acid molar ratio of 1：2 by heat treatment at 400 ℃ in air exhibit excellent specific capacity. The reversible capacity is 1121.4 m Ahg-1 after the first cycle and remains 865.3 m Ahg^-1 after 30 cycles, about 77.2% of the initial reversible capacity.
出处
《陶瓷学报》
CAS
北大核心
2015年第1期9-13,共5页
Journal of Ceramics
基金
国家自然科学基金(编号:53171036)
河北省自然科学基金(编号:E2012401003)
河北省高等学校科学技术研究项目(编号:ZD20131036)
