期刊
ELECTROCHIMICA ACTA
卷 363, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2020.137209
关键词
Microwave synthesis; Sulfur; Nitrogen co-doped FLG; Electrochemical performance; Cycle life; Supercapacitor
资金
- University Grants Commission (UGC), India [E14-2(SC)/2010 (SA-III)]
- UKIERI program, Govt. of India [DST/INT/UK/P173/2017]
- DST-IISc Energy Storage Platform on Supercapacitors and Power Dense Devices, Government of India [MECSP-2K17, DST/TMD/MECSP/2K17/20]
Doping with heteroatoms has become an approach for improving the electrochemical performance of few-layered graphene. In this work, Sulfur-nitrogen co-doped few-layered graphene synthesized from the graphite flakes acid treated with H2SO4 and HNO3 followed by microwave irradiation. Sulfur-nitrogen co-doped few-layered graphene consists of less than 15 graphene layers with a high degree of graphitization. The supercapacitor exhibited a specific energy density of 15 Wh kg(-1) at a power density of 300 W kg(-1) at room temperature in aqueous electrolyte. The S, N-FLG electrodes show the specific capacitance of 298 F g(-1) at a current density of 1 A g(-1) land stable over 10,000 continuous charge-discharge cycles with 95% capacitance retention at 1 A g(-1). The obtained capacitance is due to maximum utilization of few-layered graphene sheets, highest intrinsic surface capacitance due to the synergetic effect of the formation of N-S-H hydrogen bonds and S, N co-doping in graphene aromatic rings. (C) 2020 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据