title: From rice bran to high energy density supercapacitors: a new route to control porous structure of 3D carbon.
abstract: Controlled micro/mesopores interconnected structures of three-dimensional (3D) carbon with high specific surface areas (SSA) are successfully prepared by carbonization and activation of biomass (raw rice brans) through KOH. The highest SSA of 2475 m(2) g(-1) with optimized pore volume of 1.21 cm(3) g(-1) (40% for mesopores) is achieved for KOH/RBC = 4 mass ratio, than others. The as-prepared 3D porous carbon-based electrode materials for supercapacitors exhibit high specific capacitance specifically at large current densities of 10 A g(-1) and 100 A g(-1) i.e., 265 F g(-1) and 182 F g(-1) in 6 M KOH electrolyte, respectively. Moreover, a high power density ca. 1223 W kg(-1) (550 W L(-1)) and energy density 70 W h kg(-1) (32 W h L(-1)) are achieved on the base of active material loading (~10 mg cm(2)) in the ionic liquid. The findings can open a new avenue to use abundant agricultural by-products as ideal materials with promising applications in high-performance energy-storage devices.
authors.affiliation: Centre of Materials Science, Beijing Institute of Technology, Beijing 100081, P. R. China.
authors.forename: Jianhua
authors.initials: J
authors.lastname: Hou
authors.affiliation: Centre of Materials Science, Beijing Institute of Technology, Beijing 100081, P. R. China.
authors.forename: Chuanbao
authors.initials: C
authors.lastname: Cao
authors.affiliation: Centre of Materials Science, Beijing Institute of Technology, Beijing 100081, P. R. China.
authors.forename: Xilan
authors.initials: X
authors.lastname: Ma
authors.affiliation: Centre of Materials Science, Beijing Institute of Technology, Beijing 100081, P. R. China.
authors.forename: Faryal
authors.initials: F
authors.lastname: Idrees
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
authors.forename: Bin
authors.initials: B
authors.lastname: Xu
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
authors.forename: Xin
authors.initials: X
authors.lastname: Hao
authors.affiliation: State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China.
authors.forename: Wei
authors.initials: W
authors.lastname: Lin
mesh_terms: D002244:Carbon / Q000737:chemistry*; D025802:Electric Capacitance; D011211:Electric Power Supplies; D004566:Electrodes; D004735:Energy Transfer; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008968:Molecular Conformation; D012275:Oryza / Q000737:chemistry*; D016062:Porosity
chemical_list: D002244:Carbon