摘要
基于浒苔中海藻酸钙的“蛋盒”结构,对浒苔炭化产物进行盐酸酸洗处理,去除海藻酸钙中的钙离子,形成“蛋盒”式初始孔结构。以酸洗处理后的炭化产物为前驱体,采用KOH活化法制备浒苔基分级多孔活性炭,并研究活性炭的孔结构特性及电化学性能。研究表明:浒苔基活性炭具有分级多孔结构,其比表面积(SBET)高达3283 m^(2)g(−1) ,其中介孔提供了66%以上的比表面积。当用作超级电容器电极材料时,即使在较高的电流密度下,浒苔基活性炭也表现出优异的电化学性能。当电流密度为0.1 Ag(−1) 时,浒苔基活性炭的比电容为361 Fg(−1) ,当电流密度增大至10 Ag(−1) 时,活性炭的比电容仍然高达323 Fg(−1) ,表现出优异的高倍率性能。
Enteromorpha prolifera(EP)was carbonized,treated by HCl pickling to remove Ca2+ions to form an"egg-box"structure,and activated by KOH to obtain a porous carbon(PC).The porous texture and electrochemical performance of the PC were compared with one produced without the HCl pickling stage.Results indicate that the HCl treatment leads to the formation of a porous structure with a high specific surface area(S_(BET)),up to 3283 m^(2) g^(−1),with more than 66%of the surface area contributed by mesopores,while the carbon prepared without HCl treatment is microporous.The PC with the HCl treatment had an excellent electrochemical performance when used as the electrode material of a supercapacitor even at high current densities.Its gravimetric capacitance reached 361 Fg(−1) at a current density of 0.1 Ag^(−1),and the capacitance remained at 323 Fg(−1) at a current density of 10 Ag^(−1),both of which are higher than obtained using the PC without HCl treatment.
作者
李诗杰
张明阳
高岩
李辉
王茜
张林华
LI Shi-jie;ZHANG Ming-yang;GAO Yan;LI Hui;WANG Qian;ZHANG Lin-hua(School of Thermal Engineering,Shandong Jianzhu University,Jinan 250101,China)
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2021年第6期1158-1168,共11页
New Carbon Materials
基金
山东建筑大学博士基金(XNBS1838).
关键词
“蛋盒”结构
分级多孔炭
介孔
电化学性能
“Egg-box”structure
Hierarchical porous carbon
Mesopores
Electrochemical property
