• 文献标题:   Synthesis of holey graphene networks functionalized with p-phenylene diamine monomers for superior performance flexible solid-state supercapacitors
  • 文献类型:   Article
  • 作  者:   DU PC, DONG YM, KANG HX, WANG Q, NIU JY
  • 作者关键词:   holey graphene, pphenylene diamine, functionalized graphene network, flexible solidstate supercapacitor
  • 出版物名称:   ELECTROCHIMICA ACTA
  • ISSN:   0013-4686 EI 1873-3859
  • 通讯作者地址:   Lanzhou Univ
  • 被引频次:   5
  • DOI:   10.1016/j.electacta.2019.134610
  • 出版年:   2019

▎ 摘  要

p-Phenylene diamine (PPD) was selected as functional monomer to modify the holey graphene networks (rHGO-PPD) by a facile one-step hydrothermal method. rHGO-PPD was employed as promising active electrode materials to apply in supercapacitors (SCs), which exhibited excellent electrochemical performance, including high specific capacitance (375.5 F/g at current density of 0.5 A/g), excellent rate capability and good cycling stability due to the contribute of pseudocapacitive behavior of PPD. For further pursuit of great value in the practical application, the rHGO-PPD was used to fabricate symmetric SCs and flexible solid-state SCs (FSSCs). The FSSCs possessed high specific capacitance of 332.4 F/g, maintained good cycling stability of 74% of its initial capacitance up to 5000 charge-discharge cycles. In addition, FSSCs also exhibited extraordinary mechanical flexibility, and also maintained excellent stability even in a harsh environment. Remarkably, the FSSCs showed excellent long-term storage stability, and the capacitance kept about 88% after ten weeks of storage. Therefore, the FSSCs based on rHGO-PPD electrode material display promising application in flexible energy-storage devices. (C) 2019 Elsevier Ltd. All rights reserved.