咖啡渣制备多孔碳材料及其在锂离子电池上的应用  

Preparation of Porous Carbon Material from Coffee Grounds and Its Application to Lithium Ion Batteries

作　　者：田文卿[1] 吴雪艳[1] 魏霄[2] 

机构地区：[1]上海交通大学材料科学与工程学院,上海200240 [2]上海交通大学化学化工学院,上海200240

出　　处：《吉林大学学报（理学版）》2014年第4期802-806,共5页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:21301117)

摘　　要：以咖啡渣为原料,利用碳化与活化反应制备出多孔的碳材料,并利用X射线衍射、扫描电子显微镜、Raman光谱和N2吸附脱附等方法分析该材料的物理化学性质.结果表明:该材料具有较高的石墨化程度;当质量电流密度为0.1A/g时,其首圈放电和充电质量比容量值分别为1 029mA·h/g和461mA·h/g,且循环稳定性较好,其质量比容量远高于石墨的理论容量(372mA·h/g).An easy carbonization and activation approach was employed to synthesize porous carbon material with coffee grounds as carbon source. X-ray diffraction （XRD）, Raman spectroscopy, and scanning electron microscopy （SEM） show that the prepared material possesses a disordered structure with a relatively high graphitization degree. The existence of mesopores was confirmed by the nitrogen adsorption/desorption isotherms as well as the pore size distribution curve. At a mass current density of 0.1 A/g, the initial discharge and charge capacities of the prepared material can reach as high as 1 029 and 461 mA ·h/g, respectively, much higher than the theoretical capacity of graphite （372 mA· h/g）.

关 键 词：锂离子电池 负极材料 多孔碳 生物质 咖啡渣 

分 类 号：O482.4[理学—固体物理]