KOH活化制备直接碳燃料电池用竹炭  

Bamboo-Based Activated Carbon for DCFC Prepared by KOH Activation

作　　者：仲兆平[1] 张居兵[1] 郭厚焜[1] 付宗明[1] 肖健敏[1] 

机构地区：[1]东南大学能源与环境学院,江苏南京210096

出　　处：《工程热物理学报》2011年第12期2156-2159,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50776019);教育部博士学科点专项科研基金资助项目(No.200802860038);东南大学科技基金资助项目(No.XJ0703267)

摘　　要：本文使用KOH活化竹子制备DCFC用活性炭,考察了活化温度、活化时间和碱炭比对活性炭比表面积影响,采用镍负载以降低活性炭的电阻率并用HNO_3浸渍来实现活性炭表面改性和除灰,最后在DCFC阳极半电池中检验了活性炭的性能。结果表明:活性炭制备有如下的最佳工况,活化温度为800℃、活化时间为1 h、碱炭比为3、镍负载量为2%、负载温度为900℃、保温时间为2 h、HNO_3浸渍浓度为4 mol·L^(-1),此时制备的活性炭比表面积为2295 m^2.g^(-1)、电阻率为6963μΩ·m、灰分含量为3.58%;竹子活性炭在半电池中的性能优于活性炭纤维和石墨。Activated carbon for DCFC from bamboo with KOH activation was prepared in this paper. The influence of activation temperature, activation time and the ratio of KOH to carbon on BET surface area were investigated. The activated carbon was catalyzed by nickel to improve the electrical conductivity and then treated with HNO3 solution to realize the surface modification and ash removal. Its performance was evaluated in a DCFC anode. The optimum conditions for activated carbon preparation were listed as follows： activation temperature, 800℃; activation time, lh; ratio of KOH to carbon, 3; nickel loading, 2%; loading temperature, 900℃; holding time, 2 h; and HNO3 solution concentration, 4 mol·L-1. The activated carbon with BET surface area of 2295 m2·g-1, electrical resistivity of 6963 μΩ.m and ash content of 3.58% was prepared under such conditions. The performance of DCFC anode with bamboo-based activated carbon as fuel was better than that using other carbon fuels （activated carbon fiber and graphite）. Key words direct carbon fuel cell; activated carbon; BET surface area; electrical resistivity; oxygen functional groups

关 键 词：直接碳燃料电池 活性炭 比表面积 电阻率 含氧官能团 

分 类 号：TK6[动力工程及工程热物理—生物能]