title: 3 D Hierarchical Porous Carbon for Supercapacitors Prepared from Lignin through a Facile Template-Free Method.
abstract: Lignin-derived hierarchical porous carbon (LHPC) was prepared through a facile template-free method. Solidification of the lignin-KOH solution resulted in KOH crystalizing within lignin. The crystalized KOH particles in solid lignin acted both as template and activating agent in the heat-treatment process. The obtained LHPC, exhibiting a 3D network, consisted of macroporous cores, mesoporous channels, and micropores. The LHPC comprised 12.27 at % oxygen-containing groups, which resulted in pseudocapacitance. The LHPC displayed a capacitance of 165.0 F g(-1) in 1 M H2 SO4 at 0.05 A g(-1) , and the capacitance was still 123.5 F g(-1) even at 10 A g(-1) . The LHPC also displayed excellent cycling stability with capacitance retention of 97.3 % after 5000 galvanostatic charge-discharge cycles. On account of the facile preparation of LHPC, this paper offers a facile alternative method for the preparation of hierarchical porous carbon for electrochemical energy storage devices.
authors.affiliation: College of Chemistry, Jilin University, Changchun, 130012 (PR China), Fax: (+86) 431-85155189.
authors.forename: Wenli
authors.initials: W
authors.lastname: Zhang
authors.affiliation: College of Chemistry, Jilin University, Changchun, 130012 (PR China), Fax: (+86) 431-85155189. lhb910@jlu.edu.cn.|Key Laboratory of Physics and Technology for Advanced, Batteries of Ministry of Education, Jilin University, Changchun, 130012 (PR China). lhb910@jlu.edu.cn.
authors.forename: Haibo
authors.initials: H
authors.lastname: Lin
authors.affiliation: College of Chemistry, Jilin University, Changchun, 130012 (PR China), Fax: (+86) 431-85155189.
authors.forename: Zheqi
authors.initials: Z
authors.lastname: Lin
authors.affiliation: College of Chemistry, Jilin University, Changchun, 130012 (PR China), Fax: (+86) 431-85155189.
authors.forename: Jian
authors.initials: J
authors.lastname: Yin
authors.affiliation: College of Chemistry, Jilin University, Changchun, 130012 (PR China), Fax: (+86) 431-85155189. luhy@jlu.edu.cn.
authors.forename: Haiyan
authors.initials: H
authors.lastname: Lu
authors.affiliation: College of Chemistry, Jilin University, Changchun, 130012 (PR China), Fax: (+86) 431-85155189.
authors.forename: Dechen
authors.initials: D
authors.lastname: Liu
authors.affiliation: College of Chemistry, Jilin University, Changchun, 130012 (PR China), Fax: (+86) 431-85155189.
authors.forename: Mingzhu
authors.initials: M
authors.lastname: Zhao
mesh_terms: D002244:Carbon / Q000737:chemistry*; D025802:Electric Capacitance; D004563:Electrochemistry; D004566:Electrodes; D006878:Hydroxides / Q000737:chemistry; D008031:Lignin / Q000737:chemistry*; D016062:Porosity; D017680:Potassium Compounds / Q000737:chemistry; D013499:Surface Properties
chemical_list: D006878:Hydroxides; D017680:Potassium Compounds; D002244:Carbon; D008031:Lignin; C029943:potassium hydroxide
keywords: biomass; hierarchical porous carbon; potassium; supercapacitors; template-free