Low-cost, green synthesis of highly porous carbons derived from lotus root shell as superior performance electrode materials in supercapacitor  

作　　者：Xin Wang Mengjiao Wang Xuemei Zhang Hejun Li Xiaohui Guo 

机构地区：[1]Key Lab of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education,and the College of Chemistry and Materials Science,Northwest University,Xi'an 710069,Shaanxi,China [2]School of Materials Science and Engineering,the State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710069,Shaanxi,China

出　　处：《Journal of Energy Chemistry》2016年第1期26-34,共9页能源化学（英文版）

基　　金：National Science Foundation of China(No.21173167);the Science and Technology Committee of Shaanxi Province(Grant No.2014KW09-03);Program for New Century Excellent Talents in University(NCET-13-0953);the Research Fund of the State Key Lab of Solidification Processing(NWPU),China(Grant No.15-BZ-2015)

摘　　要：Facile production of high quality activated carbons from biomass materials has greatly triggered much attention presently. In this paper, a series of interconnected porous carbon materials from lotus root shells biomass are prepared via simple pyrolysis and followed by a KOH activation process. The prepared carbons exhibit high specific surface areas of up to 2961 m^2/g and large pore volume～1.47 cm3/g. In addition, the resultant porous carbons served as electrode materials in supercapacitor exhibit high specific capacitance and outstanding recycling stability and high energy density. In particular, their specific capacitance retention was almost 100% after 10500 cycles at a current density of 2 A/g. Remarkabely, the impact of the tailored specific surface areas of various carbon samples on their capacitive performances is systematically investigated.Generally, it was believed that the highly-developed porosity features（including surface areas and pore volume and pore size-distributions）, together with the good conductivity of activated carbon species, play a key role in effectively improving the storage energy performances of the porous carbon electrode materials in supercapacitor.Facile production of high quality activated carbons from biomass materials has greatly triggered much attention presently. In this paper, a series of interconnected porous carbon materials from lotus root shells biomass are prepared via simple pyrolysis and followed by a KOH activation process. The prepared carbons exhibit high specific surface areas of up to 2961 m^2/g and large pore volume～1.47 cm3/g. In addition, the resultant porous carbons served as electrode materials in supercapacitor exhibit high specific capacitance and outstanding recycling stability and high energy density. In particular, their specific capacitance retention was almost 100% after 10500 cycles at a current density of 2 A/g. Remarkabely, the impact of the tailored specific surface areas of various carbon samples on their capacitive performances is systematically investigated.Generally, it was believed that the highly-developed porosity features（including surface areas and pore volume and pore size-distributions）, together with the good conductivity of activated carbon species, play a key role in effectively improving the storage energy performances of the porous carbon electrode materials in supercapacitor.

关 键 词：Carbon Porous Biomass Surface area Capacity 

分 类 号：TQ424.1[化学工程] TM53[电气工程—电器]