Preparation of Biomass-Based Porous Carbons with High Specific Capacitance for Applications in Supercapacitors

被引:41
作者
Shen, Honglong [1 ]
Xia, Xifeng [1 ]
Ouyang, Yu [1 ]
Jiao, Xinyan [1 ]
Mutahir, Sadaf [1 ]
Mandler, Daniel [2 ]
Hao, Qingli [1 ]
机构
[1] Nanjing Univ Sci & Technol, Sch Chem Engn, Nanjing 210094, Jiangsu, Peoples R China
[2] Hebrew Univ Jerusalem, Inst Chem, IL-9190401 Jerusalem, Israel
基金
中国国家自然科学基金;
关键词
biomass; chemical activation; porous carbons; pyrolysis; supercapacitors; PERFORMANCE ELECTRODES; BIOCHAR; WASTE; PYROLYSIS; TEMPLATE; FACILE; SHELL;
D O I
10.1002/celc.201900395
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Supercapacitors are developing in terms of high power and energy densities. Carbon materials can meet this challenge to a certain extent. A sustainable high-performance carbon material for supercapacitors was prepared through the simple and green thermal pyrolysis of orange peels as raw materials by using KOH as an activator. The biomass-derived carbon materials activated at different temperatures were evaluated as electrode materials. The adsorption properties, structure, and surface elemental chemical states of the prepared materials were studied. Carbonation temperature plays a key role in the preparation of materials, and it has different effects on the physical and electrochemical properties of materials. The opc700 and opc800 samples have large pore volumes, which provide the necessary space for the storage of electrolyte ions. The temperature has a pronounced effect on the specific surface area and the electrochemical performance. The specific surface area of opc800 is as high as 2004 m(2) g(-1) and the pore volume is 1.24 cm(3) g(-1). The maximum specific capacity of opc800 is 306.6 F g(-1) at 0.5 A g(-1) and the specific capacitance is 251.2 F g(-1) at 20 A g(-1).
引用
收藏
页码:3599 / 3605
页数:7
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