title: Size Effect of Ordered Mesoporous Carbon Nanospheres for Anodes in Li-Ion Battery.
abstract: The present work demonstrates the application of various sizes of ordered mesoporous carbon nanospheres (OMCS) with diameters of 46-130 nm as an active anode material for Li-ion batteries (LIB). The physical and chemical properties of OMCS have been evaluated by performing scanning electron microscopy (SEM), transmission electron microscopy (TEM), N₂ adsorption-desorption analysis; small-angle scattering system (SAXS) and X-ray diffraction (XRD). The electrochemical analysis of using various sizes of OMCS as anode materials showed high capacity and rate capability with the specific capacity up to 560 mA·h·g-1at 0.1Cafter 85 cycles. In terms of performance at high current rate compared to other amorphous carbonaceous materials; a stable and extremely high specific capacity of 240 mA·h·g-1at 5Cafter 15 cycles was achieved. Such excellent performance is mainly attributed to the suitable particle size distribution of OMCS and intimate contact between OMCS and conductive additives; which can be supported from the TEM images. Results obtained from this study clearly indicate the excellence of size distribution of highly integrated mesoporous structure of carbon nanospheres for LIB application.
authors.affiliation: Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu 30013, Taiwan. yirande@gmail.com.
authors.forename: Pei-Yi
authors.initials: PY
authors.lastname: Chang
authors.affiliation: Institute of Environmental Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan. radoong@nctu.edu.tw.
authors.forename: Kartick
authors.initials: K
authors.lastname: Bindumadhavan
authors.affiliation: Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu 30013, Taiwan. radoong@nctu.edu.tw.|Institute of Environmental Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan. radoong@nctu.edu.tw.
authors.forename: Ruey-An
authors.initials: RA
authors.lastname: Doong
keywords: Li ion batteries (LIBs); ordered mesoporous carbon nanospheres (OMCS); particle size distribution; rate capability