直接碳燃料电池竹质活性炭的制备  

Preparation of Bamboo-derived Activated Carbon for Direct Carbon Fuel Cell

作　　者：张居兵[1] 仲兆平[1] 郭厚焜[1] 金保昇[1] 

机构地区：[1]东南大学能源与环境学院,江苏省南京市210096

出　　处：《中国电机工程学报》2010年第23期108-113,共6页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50776019);高等学校博士学科点专项科研基金项目(200802860038);东南大学科技基金项目(XJ0703267)~~

摘　　要：以K2CO3为活化剂,竹片为原料,采用化学活化法制取直接碳燃料电池(direct carbon fuel cell,DCFC)用活性炭,考察碱炭比、活化时间和活化温度对活性炭比表面积、孔容积、体积电阻率和灰分的影响,然后使用HNO3浸渍来实现活性炭表面改性和除灰,最后通过半电池实验分析了自制活性炭的性能。结果表明:活化温度为900℃、碱炭比为1、活化时间为2h时可制备比表面积为1264.38m2/g、孔容积为0.625m3/g、体积电阻率为1568.7μΩ·m、灰分为7.14%的活性炭;HNO3浸渍可以增加活性炭表面含氧官能团的种类和含量,也大大降低活性炭的灰分,最佳HNO3浸渍为2mol/L;自制活性炭在半电池中的极化性能优于其他2种炭燃料。Activated carbon for direct carbon fuel cell （DCFC） from bamboo with chemical activation by K2CO3 as activating agent was prepared. The influence of activation temperature, activation time and the ratio of K2CO3 to carbon on specific surface area, pore volume, volume resistivity and ash content were investigated. And activated carbon was treated with HNO3 solution impregnation to realize surface modification and ash removal. The performance of self-made activated carbon was analyzed by half cell experiment. The experiment results show that specific surface area, pore volume, volume resistivity, and ash content of activated carbon could reach 1 264.38 m2/g, 0.625 m3/g, 1 568.7 μ？？m and 7.14%, respectively. The kinds and content of surface oxygen functional groups of activated carbon increase after HNO3 solution impregnation while the ash content is reduced enormously at the same time. The optimum HNO3 solution concentration of 2 mol/L is obtained from these analyses. The polarization performance of self-made activated carbon is better than that of other carbon fuels.

关 键 词：直接碳燃料电池 活性炭 比表面积 体积电阻率 灰分 含氧官能团 

分 类 号：TK6[动力工程及工程热物理—生物能]