夹心型生物碳电极材料的制备及超级电容器性能  

Preparation of sandwich-type biochar electrode materials and performance of supercapacitor

作　　者：马婧 王芳平[1] 周凯玲 李小亚 MA Jing;WANG Fangping;ZHOU Kailing;LI Xiaoya(Key Laboratory of Bioelectrochemistry&Environmental Analysis of Gansu,Key Laboratory of Eco-Environment-Related Polymer Materials,Ministry of Education of China,College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou 730070,Gansu,China)

机构地区：[1]甘肃省生物电化学与环境分析重点实验室,省部共建生态环境相关高分子材料教育部重点实验室,西北师范大学化学化工学院,甘肃兰州730070

出　　处：《精细化工》2021年第2期374-379,共6页Fine Chemicals

基　　金：国家自然科学基金资助项目(21065010)。

摘　　要：选择板栗壳为碳源(CC),炭化后用KOH活化,制得CC700-OH电极材料。通过SEM、TEM、XRD以及BET等对其形貌和性能进行了表征与测试,发现CC700-OH具有孔/片穿插的夹心结构。在电流密度为1 A/g时,比电容为540 F/g,在电流密度为10 A/g下,循环6000圈后比电容仍可保持初始值的98%。在二电极体系中,组装CC700-OH//CC700-OH对称电容器,该对称电容器在电流密度1 A/g的比电容为106 F/g,电势窗口宽0~1.6 V,首次库伦效率为0.52。功率密度为800 mW/g时,能量密度为37.3 mW·h/g;当功率密度增加至12000 mW/g时,能量密度仍可达23.0 mW·h/g。结果表明,用板栗壳作为碳源制备对称性超级电容器电极材料是可行的。Chestnut shell was carbonized and then activated by KOH to prepare CC700-OH electrode material.The morphology and performances of CC700-OH were characterized by SEM,TEM,XRD and BET.It was found that CC700-OH had a sandwich structure with holes/sheets interspersed.A specific capacitance of CC700-OH was 540 F/g at 1 A/g current density,while the capacitance could still maintain 98%of initial value after 6000 cycles at 10 A/g.In a two-electrode system,CC700-OH//CC700-OH symmetrical capacitor was assembled and had a specific capacitance of 106 F/g at 1 A/g current density and the potential window width was from 0 to 1.6 V,and the first coulomb efficiency was 0.52.When the power density was 800 m W/g,the energy density was 37.3 m W·h/g,while the power density was increased to 12000 m W/g,the energy density could still be maintained at 23.0 m W·h/g.The results show that it is feasible to prepare symmetrical supercapacitor electrode materials using chestnut shell as carbon source.

关 键 词：对称超级电容器 多孔碳 板栗壳 夹心结构 能量密度 有机电化学与工业 

分 类 号：TM924.11[电气工程—电力电子与电力传动] O613.7[理学—无机化学]