Nitrogen and phosphorus co-doped silkworm-cocoon-based self-activated porous carbon for high performance supercapacitors

JOURNAL OF POWER SOURCES

卷:438

Article

Wang, Yakun¹  Zhang, Mengke¹  Dai, Yang¹  Wang, Hui-Qiong^3,4  Zhang, Huaiyu²  Wang, Qianqian¹  Hou, Wenbo¹  Yan, Hao¹  Li, Wenrong¹  Zheng, Jin-Cheng^3,4 

[1] Shanghai Univ, Inst Sustainable Energy, Sch Environm & Chem Engn, Dept Chem Engn, Shangda Rd 99, Shanghai 200444, Peoples R China

[2] Univ Southern Calif, Mork Family Dept Chem Engn & Mat Sci, Los Angeles, CA 90089 USA

[3] Xiamen Univ, Dept Phys, Collaborat Innovat Ctr Optoelect Semicond & Effic, Xiamen 361005, Fujian, Peoples R China

[4] Xiamen Univ Malaysia, Sepang 439000, Selangor, Malaysia

关键词: Porous carbon;    Capacitive performance;    Semi-solid state supercapacitor;    Flexible devices;    Silkworm cocoon;    Biomass;   

DOI  :  10.1016/j.jpowsour.2019.227045

来源: Elsevier

【 摘 要 】

N/P co-doped porous carbon is prepared from biomass (silkworm cocoon) and natural product (phytic acid) by an eco-friendly self-activation approach. Owing to the rational pore structure, and abundant pseudocapacitive active sites of heteroatom doping, the prepared Cheese-brick-like porous carbon presents outstanding performances. The optimized S2 sample delivers both high gravimetric capacitance and volumetric Capacitance of 317 F g(-1) (482F cm(-3)) at 1 A g(-1), and an impressive capacitance of 159 F g(-1) (242 F cm(-3)) at a high current density of 50 A g(-1) in 1 M H2SO4. Also, the thick electrode (10 mg cm(-2)) can deliver a high areal capacitance up to 2.44 F cm(-2) at 10 mA cm(-2) and 1.29 F cm(-2) at 500 mA cm(-2). Additionally, the porous carbon based flexible symmetric supercapacitor (1.4 V) can deliver a remarkable 19.6 Wh kg(-1) (29.8 Wh l(-1)) at 350 W kg(-1), and 9.6 Wh kg(-1) (14.6 Wh l(-1)) at 17500 W kg-1, respectively, as well as outstanding cyclic longevity (similar to 98% capacitance retention after 10000 cycles). These attractive performances enable a wonderful potential of our porous carbon applied in supercapacitors for wearable electronics and other energy storage devices.

【 授权许可】

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