材料科学
石墨烯
阳极
锂(药物)
杂原子
电极
电化学
介孔材料
纳米技术
化学工程
石墨烯泡沫
电流密度
碱金属
钾
兴奋剂
光电子学
催化作用
氧化石墨烯纸
有机化学
冶金
戒指(化学)
化学
物理化学
内分泌学
工程类
物理
医学
量子力学
作者
Zhicheng Ju,Shuai Zhang,Zheng Xing,Quanchao Zhuang,Qiang Ye,Yitai Qian
标识
DOI:10.1021/acsami.6b04763
摘要
Heteroatom-doped graphene is considered a potential electrode materials for lithium-ion batteries (LIBs). However, potassium-ion batteries (PIBs) systems are possible alternatives due to the comparatively higher abundance. Here, a practical solid-state method is described for the preparation of few-layer F-doped graphene foam (FFGF) with thickness of about 4 nm and high surface area (874 m2g–1). As anode material for LIBs, FFGF exhibits 800 mAh·g–1 after 50 cycles at a current density of 100 mA·g–1 and 555 mAh·g–1 after 100 cycles at 200 mA·g–1 as well as remarkable rate capability. FFGF also shows 165.9 mAh·g–1 at 500 mA·g–1 for 200 cycles for PIBs. Research suggests that the multiple synergistic effects of the F-modification, high surface area, and mesoporous membrane structures endow the ions and electrons throughout the electrode matrix with fast transportation as well as offering sufficient active sites for lithium and potassium storage, resulting in excellent electrochemical performance. Furthermore, the insights obtained will be of benefit to the design of reasonable electrode materials for alkali metal ion batteries.
科研通智能强力驱动
Strongly Powered by AbleSci AI