title: Direct Synthesis of Few-Layer F-Doped Graphene Foam and Its Lithium/Potassium Storage Properties.
abstract: 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 m(2)g(-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.
authors.affiliation: School of Materials Science and Engineering, China University of Mining and Technology , Xuzhou, Jiangsu 221116, PR China.
authors.forename: Zhicheng
authors.initials: Z
authors.lastname: Ju
authors.affiliation: School of Materials Science and Engineering, China University of Mining and Technology , Xuzhou, Jiangsu 221116, PR China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Zhang
authors.affiliation: School of Materials Science and Engineering, China University of Mining and Technology , Xuzhou, Jiangsu 221116, PR China.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Xing
authors.affiliation: School of Materials Science and Engineering, China University of Mining and Technology , Xuzhou, Jiangsu 221116, PR China.
authors.forename: Quanchao
authors.initials: Q
authors.lastname: Zhuang
authors.affiliation: School of Materials Science and Engineering, China University of Mining and Technology , Xuzhou, Jiangsu 221116, PR China.
authors.forename: Yinghuai
authors.initials: Y
authors.lastname: Qiang
authors.affiliation: Hefei National Laboratory for Physical Science at Microscale, Department of Chemistry, University of Science and Technology of China , Hefei, Anhui 230026, PR China.
authors.forename: Yitai
authors.initials: Y
authors.lastname: Qian
keywords: F-doped graphene; anode materials; lithium-ion batteries; potassium-ion batteries; synergistic effects