树叶基多孔碳材料的制备及其电化学性能研究  

Synthesis and electrochemical performance of leaves-based porous carbon materials

作　　者：姜洋[1] 牛云凤 王燕[1] 郑鸿宇[1] 侯莉[1] 

机构地区：[1]燕山大学环境与化学工程学院,河北秦皇岛066004

出　　处：《燕山大学学报》2016年第3期257-262,共6页Journal of Yanshan University

基　　金：河北省自然科学基金资助项目(B2012203005);中国博士后科学基金资助项目(2015M581315)

摘　　要：开发了一种简单、经济、环保、利用生物质快速生产具有优良电化学性能的碳材料的方法。利用梧桐树叶作为生物质原料制备多孔碳材料,对其结构、形貌和电化学性能进行分析和测试。结果表明:以梧桐叶为原料,碱碳比为3,活化温度为800℃,活化时间为2 h时,制备的多孔碳材料具有大的BET比表面积,其值为2 178 m2/g,孔径分布为2.5 nm,比电容达到304 F/g。当电流密度由0.25 A/g增加至20 A/g时,样品的容量保持率为82.6%。以树叶为原料制备的多孔碳材料展示出高电容和优异的倍率特性,有望在超级电容器等领域得到重要应用。A simple, economic and eco-friendly method based on biomass is developed for preparation of carbon material with excellent electrochemical performance. By using the parasol tree leaf as biomass raw material, the porous carbon materials were prepared and their structure, morphology and electrochemical performance were investigated. Results show that the prepared porous carbon materials have a big BET surface area of 2 178 m^2/ g and uniform pore size around 2. 5 nm and a high specific capacitance up to 304 F / g when the parasol tree leaf was used as raw material with a alkali / carbon ratio of 3 under 800 ℃ activation for 2 h. The capacity retention rate of sample maintains 82. 6% with current density varies from 0. 25 to 20 A / g. The leaves-based porous carbon materials show a high capacity and excellent rate capability, which is expected to have important application in the field of supercapacitor.

关 键 词：生物质 树叶 多孔碳 比电容 超级电容器 

分 类 号：TQ424.1[化学工程]