A comparative study of anode properties of two ordered mesoporous carbons with tailored crystalline structure for lithium ion batteries
Ordered mesoporous carbons (C-1 and C-2) with tailored pore size and defined crystal orientation are prepared by liquid crystal template carbonization method using AR-mesophase pitch as carbon precursors and SBA-15 as template.The topography,pore/crystalline structure are extensively characterized via high-resolution transmission electron microscope (HR-TEM),N2 adsorption/desorption and powder X-ray diffraction (XRD).The electrochemical properties of C-1and C-2 as anode materials for lithium ion batteries (LIBs) are examined by galvano-statically charge/discharge and electrochemical impedance spectroscopy (EIS).Materials characterization shows that the carbons prepared in this work replicate the ordered mesoporous structure of the SBA-15 and possess tailored crystalline structure with graphene layers perpendicular to the axial of pore walls.The carbons both display preferable anode performance for LIBs.However,C-2 with thicker pore wall exhibits better properties than C-1 with larger pore size.Possible reasons for different properties are the influence of the pore structure and wall thickness of as-prepared mesoporous carbons.
Lithium ion batteries Ordered mesoporous carbon Tailored crystalline structure Anode properties
Jianguo Cao Zhaohui Hou Fanyan Zeng Chongyong Ge Yafei Kuang
College of Chemistry and Chemical Engineering,Hunan University,Hunan,Changsha 410082,PR China;Colleg College of Chemistry and Chemical Engineering,Hunan Institute of Science and Technology,Hunan,Yueyan College of Chemistry and Chemical Engineering,Hunan University,Hunan,Changsha 410082,PR China
国际会议
沈阳
英文
1503-1508
2012-09-26（万方平台首次上网日期，不代表论文的发表时间）