文献类型：期刊文献

中文题名：木质素基高比表面积活性炭的制备及其电化学性能研究

英文题名：Preparation and Electrochemical Performance of Lignin-based High Specific Surface Area Activated Carbon

作者：杨中志[1] 王傲[1] 马名哲[1] 丁玉[1] 孙云娟[1] 蒋剑春[1]

第一作者：杨中志

机构：[1]中国林业科学研究院林产化学工业研究所、江苏省生物质能源与材料重点实验室、国家林业和草原局林产化学工程重点实验室、林木生物质低碳高效利用国家工程研究中心、江苏省林业资源高效加工利用协同创新中心,江苏南京210042

年份：2024

卷号：44

期号：3

起止页码：37-44

中文期刊名：林产化学与工业

外文期刊名：Chemistry and Industry of Forest Products

收录：CSTPCD;;Scopus;北大核心:【北大核心2023】；CSCD:【CSCD2023_2024】；

基金：国家自然科学基金资助项目(51976234)。

语种：中文

中文关键词：木质素;活性炭;电化学性能;超级电容器

外文关键词：lignin;activated carbon;electrochemical performance;supercapacitor

分类号：TQ35;TK6

摘要：将杨木先经过CO_(2)辅助水热预处理,再用对甲苯磺酸溶液处理,分离得到高纯度酸溶性木质素(AHL)。以AHL为前驱体,分别采用H_(3)PO_(4)法和KOH法制备了孔隙结构发达的活性炭AHLAC-H_(3)PO_(4)和AHL-AC-KOH,通过多种技术手段对活性炭的结构进行了表征,并对比研究了其作为超级电容器电极材料时的电化学性能。结构表征结果表明:AHL-AC-H_(3)PO_(4)和AHL-AC-KOH的比表面积分别为2490和3344 m^(2)/g,总孔容分别为1.24和1.74 cm^(3)/g。电化学性能测试结果表明:随着电流密度从0.5 A/g增大到10 A/g时,AHL-AC-H_(3)PO_(4)的比电容由241.24 F/g下降至83.95 F/g,电容保持率仅为34.80%;而AHL-AC-KOH的比电容由269.19 F/g下降至229.76 F/g,电容保持率为85.35%。AHL-AC-H_(3)PO_(4)的充/放电行为可逆性和倍率性能较差,电阻较大;而AHL-AC-KOH具有典型的双电层电容和法拉第快速氧化还原反应特性,并展现出高度可逆的充/放电行为,且具有良好的倍率性能和较小的电阻。
The high-purity acid hydrotropic lignin(AHL)was isolated from poplar wood followed by CO_(2)assisted hydrothermal pretreatment and p-toluenesulfonic acid solution treatment.Then AHL was used as a precursor to prepared activated carbon of AHL-AC-H_(3)PO_(4)and AHL-AC-KOH with well-developed pore structure through H_(3)PO_(4)and KOH method,respectively.The structure of activated carbon was characterized through various techniques,and its electrochemical performance as an electrode material for supercapacitor was studied and compared.The structure characterization results indicated that the specific surface areas of AHL-AC-H_(3)PO_(4)and AHL-AC-KOH were 2490 and 3344 m^(2)/g,and the pore volume were 1.24 and 1.74 cm^(3)/g,respectively.The characterization results of electrochemical performance analysis showed that as the current density increased from 0.5 A/g to 10 A/g,the specific capacitance of AHL-AC-H_(3)PO_(4)decreased from 241.24 F/g to 83.95 F/g,and the capacitance retention rate was only 34.80%.The specific capacitance of AHL-AC-KOH decreased from 269.19 F/g to 229.76 F/g,with the capacitance retention rate of 85.35%.The charge/discharge behavior reversibility and rate performance of AHL-AC-H_(3)PO_(4)were poor,and the resistance was large.AHL-AC-KOH had typical electric double layer capacitance and Faraday fast redox reaction characteristics,exhibited highly reversible charge/discharge ability,and had good rate capability and low resistance.