摘要
采用改进熔盐法合成了锂离子电池正极材料Chevrel相的Cu2Mo6S8,用X射线衍射仪、扫描电镜对所得样品的晶体结构、表面形貌等进行了表征,用电化学工作站等对其进行了电化学性能测试.结果表明,熔盐法制备的Cu2Mo6S8材料的晶体结构为Chevrel相,颗粒分布均匀,结晶状态良好;其在1～3 V充放电时,前10次循环容量在100 mAh/g以上;材料的循环曲线中,存在4对充放电平台,与伏安循环曲线的4对氧化还原峰对应;该材料的伏安循环曲线具有较为对称的氧化还原峰,表明该材料具有良好的氧化还原可逆性.
The Chevrel Phases （CPs） materials Cu2Mo6S8 for lithium-ion batteries were synthesized by improved molten salt method. The structural properties and electrochemical performances of the sample were investigated by X-ray diffraction, scanning electron microscope, charge-discharge test and cyclic voltammetry. The results show that Cu2Mo6Ss is Chevrel phase and uniformly distribution of gain size; the electrochemical characteristic shows good charge and discharge performance with an energy density of at least 100 mAh/g for the first ten cycles in the potential range between 3.0 and 1 V; four obvious charge voltage plateaus and four discharge voltage plateaus in the charge-discharge curves are existed; the voltammetric cycle curve of the material has a relatively symmetrical redox peaks which indicates the material has good redox reversibility.
出处
《电源技术》
CAS
CSCD
北大核心
2014年第2期207-209,共3页
Chinese Journal of Power Sources
基金
上海市科委重点专项资助项目(10DZ2211000)
上海市重点基础(10JC1407700)
上海自然科学基金(11ZR1417600)
教育部博士点优先发展领域基金(20110073130001)
