title: Study of Microstructure Change of Carbon Nanofibers as Binder-Free Anode for High-Performance Lithium-Ion Batteries.
abstract: Flexible and binder-free film of N, O-doped carbon nanofibers (CNFs) is the ideal anode for high-energy-density batteries. Here, CNFs flexible films which the N, O dopant give defect in graphite structure results in high specific surface area more than 500 m2g-1. A flexible film of CNF800 carbonized at 800 °C delivers initial capacities of 2000 and 755 mAh g-1at the current densities of 5 and 10 A g-1, respectively. After 500 cycles, CNF800 remains the capacities of 1251, 865, 702, and 305 mAh g-1at 0.5, 1, 5, and 10 A g-1, respectively. The microstructures of CNFs under various state of charge are studied by HRTEM, XPS,13C NMR, and so forth. The lithiation/delithiation mainly happens to the interlayer of graphite domain of CNFs. The dopants of nitrogen and oxygen involve in lithiation, but much of Li-N is irreversible. The excellent performances of CNFs film can be attributed to the N, O doped structure of graphite domain that has increased the conductivity and lithium storage ability. Further development of N, O doped CNFs may enable practical applications as flexible anode in high-performance lithium-ion batteries.
authors.affiliation: Jiangsu Laboratory of Advanced Functional Material, School of Chemistry and Materials Engineering, Changshu Institute of Technology , Changshu 215500, P. R. China.
authors.forename: Ting
authors.initials: T
authors.lastname: Wang
authors.affiliation: Jiangsu Laboratory of Advanced Functional Material, School of Chemistry and Materials Engineering, Changshu Institute of Technology , Changshu 215500, P. R. China.
authors.forename: Shaojun
authors.initials: S
authors.lastname: Shi
authors.affiliation: Jiangsu Laboratory of Advanced Functional Material, School of Chemistry and Materials Engineering, Changshu Institute of Technology , Changshu 215500, P. R. China.|Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, P.R. China.
authors.forename: Yuhong
authors.initials: Y
authors.lastname: Li
authors.affiliation: Jiangsu Laboratory of Advanced Functional Material, School of Chemistry and Materials Engineering, Changshu Institute of Technology , Changshu 215500, P. R. China.
authors.forename: Mengxi
authors.initials: M
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, P.R. China.
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Chang
authors.affiliation: Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, P.R. China.
authors.forename: Di
authors.initials: D
authors.lastname: Wu
authors.affiliation: Jiangsu Laboratory of Advanced Functional Material, School of Chemistry and Materials Engineering, Changshu Institute of Technology , Changshu 215500, P. R. China.
authors.forename: Haiying
authors.initials: H
authors.lastname: Wang
authors.affiliation: Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, P.R. China.
authors.forename: Luming
authors.initials: L
authors.lastname: Peng
authors.affiliation: National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences and Collaborative Innovation Center of Advanced Microstructures, Nanjing University , Nanjing 210093, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
authors.affiliation: Jiangsu Laboratory of Advanced Functional Material, School of Chemistry and Materials Engineering, Changshu Institute of Technology , Changshu 215500, P. R. China.
authors.forename: Gang
authors.initials: G
authors.lastname: Yang
keywords: binder-free anode; carbon nanofibers; electrochemical performance; flexible film; lithium-ion batteries