摘要
二硫化钨由于具有独特的层状结构、大的层间距等优点,已经成为一种非常有潜力的钠离子电池负极材料,但是其导电性差、充放电过程中易发生体积膨胀的不足限制了它进一步的广泛应用.本文以六氯化钨、硫代乙酰胺以及自制的空心碳壳为原料,采用溶剂热法合成了一种中空杆状结构的C/WS_(2)复合材料,将其用于钠离子电池来改善其上述存在的问题.结果表明,在2 A g^(-1)的电流密度下,循环90圈后,C/WS_(2)电极的比容量仍能达到417.1 mAh g^(-1);在10.0 A g^(-1)的大电流密度下,还具有343.3 mAh g^(^(-1))的比容量.因此,中空杆状C/WS2复合材料具有优异的储钠性能.
Tungsten disulfide has become a very potential anode material for sodium ion batteries because of its unique layered structure and large interlayer spacing.However,its further wide application is limited by its poor conductivity and easy volume expansion during charging and discharging.In this paper,using tungsten hexachloride,thioacetamide and self-made hollow carbon shell as raw materials,a hollow rod-shaped C/WS_(2) composite material was synthesized by solvothermal method,and it was used in sodium ion battery to improve the above problems.The results show that the specific capacity of C/WS 2 electrode can still reach 417.1 mAh g^(-1) after 90 cycles at the current density of 2 A g^(-1).Under the high current density of 10.0 A g^(-1),it also has a specific capacity of 343.3 mAh g^(-1).Therefore,the hollow rod-shaped C/WS_(2) composite material has excellent sodium storage performance.
作者
黄剑锋
王瑜航
曹丽云
李嘉胤
罗晓敏
HUANG Jian-feng;WANG Yu-hang;CAO Li-yun;LI Jia-yin;LUO Xiao-min(School of Material Science and Engineering,Shaanxi Province International S&T Cooperation Foundation,Xi′an Key Laboratory of Green Manufacture of Ceramic Materials,Shaanxi University of Science&Technology,Xi′an 710021,China)
出处
《陕西科技大学学报》
北大核心
2023年第3期104-110,共7页
Journal of Shaanxi University of Science & Technology
基金
国家自然科学基金项目(52073166,52172049)
陕西省农业厅农业科技创新驱动计划项目(NYKJ-2022-XA-08)
陕西省轻化工材料与化学开放共享平台科研项目(2020PT-022)。
关键词
二硫化钨
中空杆状结构
钠离子电池
tungsten disulfide
hollow rod-shaped structure
sodium ion battery
