title: Pumpkin-Derived Porous Carbon for Supercapacitors with High Performance.
abstract: Pumpkin has been employed for the first time as a renewable, low-cost precursor for the preparation of porous carbon materials with excellent performance. Unlike most other precursors, pumpkin is rich in sugars and starch, and it has advantageous properties for large-scale production. The as-prepared materials adopted a unique morphology that consisted of numerous fused sphere-like carbon grains with a high specific surface area (2968 m(2)  g(-1) ), abundant micro and mesopores, and excellent electrochemical properties. The pumpkin-derived activated carbon (PAC) material not only exhibited a high specific capacitance of 419 F g(-1) , but also showed considerable cycling stability, with 93.6 % retention after 10 000 cycles. Moreover, a symmetrical supercapacitor that was based on PAC showed a high energy density of 22.1 W h kg(-1) in aqueous electrolyte. These superior properties demonstrate that PAC holds great promise for applications in electrochemical energy-storage devices.
authors.affiliation: College of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, P. R. China.
authors.forename: Suying
authors.initials: S
authors.lastname: Bai
authors.affiliation: College of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, P. R. China.
authors.forename: Guangqun
authors.initials: G
authors.lastname: Tan
authors.affiliation: Institute of New Energy and Low-Carbon Technology, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, P. R. China.
authors.forename: Xiaoqin
authors.initials: X
authors.lastname: Li
authors.affiliation: College of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, P. R. China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Zhao
authors.affiliation: College of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, P. R. China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Meng
authors.affiliation: College of Chemistry, Sichuan University, No. 29 Wangjiang Road, Chengdu, 610064, P. R. China.
authors.forename: Yujue
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Institute of New Energy and Low-Carbon Technology, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, P. R. China.
authors.forename: Yongzhi
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: College of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, P. R. China. xiaodan@scu.edu.cn.|Institute of New Energy and Low-Carbon Technology, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu, 610065, P. R. China. xiaodan@scu.edu.cn.|College of Chemistry, Sichuan University, No. 29 Wangjiang Road, Chengdu, 610064, P. R. China. xiaodan@scu.edu.cn.
authors.forename: Dan
authors.initials: D
authors.lastname: Xiao
mesh_terms: D002244:Carbon / Q000737:chemistry*; D028464:Cucurbita / Q000737:chemistry*; D025802:Electric Capacitance; D055664:Electrochemical Techniques / Q000295:instrumentation*; D004566:Electrodes; D004573:Electrolytes / Q000737:chemistry; D016062:Porosity; D059205:Renewable Energy
chemical_list: D004573:Electrolytes; D002244:Carbon
keywords: capacitors; energy storage; microporous materials; pumpkin; renewable resources