• 文献标题:   Heavily nitrogen doped, graphene supercapacitor from silk cocoon
  • 文献类型:   Article
  • 作  者:   SAHU V, GROVER S, TULACHAN B, SHARMA M, SRIVASTAVA G, ROY M, SAXENA M, SETHY N, BHARGAVA K, PHILIP D, KIM H, SINGH G, SINGH SK, DAS M, SHARMA RK
  • 作者关键词:   nitrogen doped graphene, supercapacitor, silk cocoon
  • 出版物名称:   ELECTROCHIMICA ACTA
  • ISSN:   0013-4686 EI 1873-3859
  • 通讯作者地址:   Univ Delhi
  • 被引频次:   94
  • DOI:   10.1016/j.electacta.2015.02.019
  • 出版年:   2015

▎ 摘  要

Doping of graphene with nitrogen is of much interest, since it improves the overall conductivity and supercapacitive properties. Besides conductivity, nitrogen doping also enhances the pseudo-capacitance due to fast and reversible surface redox processes. In this work, we have developed a cheap and easy process for synthesizing heavily nitrogen doped graphene (15% nitrogen) from non-mulberry silk cocoon membrane (Tassar, Antheraea mylitta) by pyrolyzing the cocoon at 400 degrees C in argon atmosphere. Further we have investigated the performance of this heavily 'nitrogen doped graphene' (NDG) in a supercapacitor device. Our results suggest that NDG obtained from cocoon has improved supercapacitor performance. The improved performance is due to the high electronegativity of nitrogen that forms dipoles on the graphene surface. These dipoles consequently enhance the tendency of graphene to attract charged species to its surface. This is a green and clean synthesis approach for developing electronic materials for energy applications. (C) 2015 Elsevier Ltd. All rights reserved.