摘要
通过水热法制备Bi_2O_3-rGO复合物作为高性能锂离子电池负极材料。Bi_2O_3颗粒均匀分布在石墨烯片层中,形成网络结构。Bi_2O_3-rGO复合物负极材料表现出了优异的电化学性能,在100 m A/g的电流密度下,首次放电比容量为1 438.6 m A·h/g,循环100次后容量为312.1 m A·h/g,高于未包覆的Bi_2O_3粉末(首次放电比容量为1 709.6 m A·h/g,循环100次后容量为47 m A·h/g),且在800 m A/g的电流密度下,容量仍有239.1 m A·h/g。Bi_2O_3-rGO复合物优异的电化学性能主要归因于高的电子导电率、大的比表面积及低程度的结构坍塌。
The bismuth oxide graphene(Bi2O3-rGO)composite as high performance anode material for lithium-ion battery was fabricated by a simple hydrothermal method.The Bi2O3 nanoparticles were uniformly distributed in the graphene's layers to form a network structure.It was demonstrated that the initial discharge capacity of Bi 2O3-rGO composite was as high as 14 38.6 mA·h/g at 100 mA/g and 312.1 mA·h/g after 100 cycles,which was much higher than that of pure Bi2O3 powder(initial discharge capacity was 1 709.6 mA·h/g at 100 mA/g and 47 mA·h/g after 100 cycles),and it still remained 239.1 mA·h/g at 800 mA/g.The excellent performance of Bi2O3-rGO composite can be attributed to higher ionic conductivity,larger specific surface area and restricted volumetric change.
作者
董月芬
Dong Yuefen(Department ofChemical Engineering,Shijiazhuang University ofApplied Technology,Shijiazhuang 050081,China)
出处
《无机盐工业》
CAS
北大核心
2018年第4期23-26,共4页
Inorganic Chemicals Industry
基金
河北省教育厅项目(2015GJJG334)
石家庄市级精品在线项目(流体输送技术)
关键词
石墨烯
氧化铋
水热法
电化学性能
grapheme
Bi2O3
hydrothermal method
electrochemical performance
