多孔微晶炭的制备及储锂性能研究  

Preparation and lithium storage properties of porous crystallite carbon

作　　者：石美荣[1] 李孟元[1] 段兴潮[1] 刘春玲[1] 董文生[1] 

机构地区：[1]陕西师范大学化学与材料科学学院应用表面与胶体化学教育部重点实验室,陕西西安710062

出　　处：《电源技术》2011年第11期1346-1350,共5页Chinese Journal of Power Sources

基　　金：陕西师范大学中央高校基本科研业务费资助重点项目(GK200901002)

摘　　要：将AR树脂液相炭化、高温炭化后,通过KOH活化及氢气还原制备了多孔微晶炭。采用N2物理吸附、X射线衍射(XRD)和X射线光电子能谱(XPS)等手段表征了炭化、活化及氢气还原样品的孔结构、微晶结构和表面化学性质,并通过恒电流充放电测试和循环伏安测试研究了该材料作为锂离子电池负极材料的电化学性能。研究结果表明:炭化样品首次可逆比容量为565.6 mAh/g,活化样品高达925.3 mAh/g,但循环性能欠佳;经氢气还原后首次可逆比容量仍可达684.0 mAh/g,30次循环后维持在约600 mAh/g,具有很好的循环性能。The porous crystallite carbons were prepared using AR resin as the precursor.The pore structure,crystallite structure and surface properties of samples were investigated by N2 adsorption,X-ray diffraction（XRD） and X-ray photoelectron spectroscopy（XPS）,respectively.The lithium storage properties of porous crystallite carbons as anode materials for lithium-ion batteries were studied by galvanostatic charge-discharge,cyclic voltammogram（CV）.The results show that the porous crystallite carbon（ARC） prepared by liquid phase carbonization followed by high temperature carbonization delivers an initial reversible specific capacity of 565.6 mAh/g;the porous crystallite carbon（ARCA） prepared by KOH activation has a high initial reversible specific capacity of 925.3 mAh/g,but the cycle performance is poor.The first reversible specific capacity of the sample prepared by hydrogen treatment is 684.0 mAh/g,and after 30 cycles,the sample still maintains a specific capacity of 600 mAh/g,indicating an enhanced cycle performance.

关 键 词：AR树脂 液相炭化 多孔微晶炭 锂离子电池 

分 类 号：TM912.9[电气工程—电力电子与电力传动]