期刊
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
卷 15, 期 8, 页码 8296-8310出版社
ESG
DOI: 10.20964/2020.08.57
关键词
Heteroatom; Pine mushroom; Co-doped; Porous carbon materials; Supercapacitor
资金
- University-level platform project of Suzhou University [2019ykf07, 2019ykf05]
- Suzhou university scientific research foundation project [2019jb02]
- National Training Programs of Innovation and Entrepreneurship for Undergraduates [201910379089]
- Scientific Research Project for College Students of Suzhou University [KYLXYBXM19-064]
- Academic technology leader program of Suzhou University [2016XJXS03]
- Important projects of natural science research in Colleges and universities of Anhui Province in 2017 [KJ2017A435]
- Scientific Research Foundation of Suzhou University [2018SZXYDZXZ02]
- Innovative Research Team of Anhui Provincial Education Department [2016SCXPTTD]
- Key Discipline of Material Science and Engineering of Suzhou University [2017XJZDXK3]
- Famous teacher studio of Hongyan Wang [2016msgzs071]
Due to the unique physicochemical properties, heteroatom doping of porous carbon has attracted wide attention. However, the complicated synthesis process and high cost limit its mass production. In this work, nitrogen and oxygen co-doped porous carbon materials (N-O-PCMs) derived from pine mushroom (PM) were prepared using a one-step carbonization and activation approach with potassium hydroxide (KOH) as active agent and at different PM/KOH mass ratios. The as-prepared hierarchical porous carbon materials are shown to not only contain rich N and O species, but also have an appropriate mesopore ratio and a narrow mesopore size distribution. Among all samples, the sample N-O-PCM-3 exhibits the largest specific surface area (935.8 m(2) g(-1)), greatest total pore volume (0.56 cm(3) g(-1)), highest content of oxygen (20.1 at.%) and nitrogen (4.9 at.%) as well as optimal hierarchical porous structure. The N-O-PCMs were tested in two electrode systems using 1 M Na2SO4 aqueous electrolyte. N-O-PCM-3 shows an energy density of up to 35.9 Wh kg(-1) at 360 W kg(-1) and an outstanding long-term stability (89.7 % after 10,000 cycles). This work proposes a facile and low-cost method for synthesizing multiple heteroatom-doped hierarchical porous carbon for supercapacitors.
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