高比表面积生物质多孔碳的制备及其电化学性能  

Synthesis of porous biomass carbon with high specific surface area and its electrochemical properties

作　　者：金小青[1] 汪秀雯 马志虎 Jin Xiaoqing;Wang Xiuweng;Ma Zhihu(Key Laboratory of Hexi Corridor Resources Utilization of Gansu,Department of Chemistry,Hexi University,Zhangye 734000)

机构地区：[1]河西学院化学与化工学院、甘肃省高校河西走廊特色资源利用省级重点实验室,张掖734000

出　　处：《化工新型材料》2023年第5期249-254,共6页New Chemical Materials

基　　金：甘肃省河西走廊特色资源利用重点实验室面上项目(XY1809);国家级大学生创新创业训练计划项目(201910740008)。

摘　　要：以玉米秸秆为碳源(CS),经Na2CO3溶液浸泡预处理后,采用KOH活化,制备了多孔生物质碳材料(CS-ACs)。通过形貌、结构表征及电化学性能测试,发现生物质碳材料CS-AC-3具备多级孔道结构,比表面积可达3299m^(2)/g。三电极体系下,该材料在6mol/L NaOH和0.5mol/L Na_(2)SO_(4)电解液中,1A/g电流密度下,比电容分别为272F/g、220F/g,循环5000圈后(5A/g),其容量保持率为89%和80%;二电极体系中,以该材料组装的CS-AC-3//CS-AC-3对称电容器具有1.4V的宽电压窗口和较好的电容特性。作为一种可再生廉价碳材料,CS-ACs在实际应用中有好的应用前景。Corn stalk was used as carbon source(CS),pretreated by soaking in Na_2CO_3 solution and activated by KOH to prepare porous biomass carbon(CS-ACS).The component,structure,morphology and electrochemical performances were investigated.The researches revealed that CS-AC-3 had multi-channel structure and the specific surface area could reach 3299m^(2)/g.In three-electrode system,its specific capacitance as single electrode was up to 272F/g and 220F/g in 6mol/L NaOH solution and 0.5mol/L Na_(2)SO_(4)solution as the electrolytes at a current density of 1A/g,respectively,and its capacity retention was 89%and 80%,respectively,after 5000 cycles at a current density of 5A/g.The CS-AC-3//CS-AC-3 symmetric capacitor assembled with this material had a wide voltage window of 1.4V and good electrochemical performance in two-electrode system.As a renewable and promising carbon material,the CS-ACS had excellent prospects for practical application.

关 键 词：玉米秸秆 生物质碳 高比表面积 电容特性 

分 类 号：O646[理学—物理化学]