• 文献标题:   In-situ chemical reduction produced graphene paper for flexible supercapacitors with impressive capacitive performance
  • 文献类型:   Article
  • 作  者:   YE XK, ZHU YC, TANG ZH, WAN ZQ, JIA CY
  • 作者关键词:   insitu chemical reduction, loose multilayered structure, graphene paper, flexible supercapacitor, capacitive performance
  • 出版物名称:   JOURNAL OF POWER SOURCES
  • ISSN:   0378-7753 EI 1873-2755
  • 通讯作者地址:   Univ Elect Sci Technol China
  • 被引频次:   19
  • DOI:   10.1016/j.jpowsour.2017.05.103
  • 出版年:   2017

▎ 摘  要

For practical applications of graphene-based materials in flexible supercapacitors, a technological breakthrough is currently required to fabricate high-performance graphene paper by a facile method. Herein, highly conductive (similar to 6900 S m(-1)) graphene paper with loose multilayered structure is produced by a high-efficiency in-situ chemical reduction process, which assembles graphite oxide suspensions into film and simultaneously conducts chemical reduction. Graphene papers with different parameters (including different types and doses of reductants, different thicknesses and areas of films) are successfully fabricated through this in-situ chemical reduction method. Meanwhile, the influences of the graphene papers with different parameters upon the supercapacitor performance are systematically investigated. Flexible supercapacitor based on the graphene paper exhibits high areal capacitance (152.4 mF cm(-2) at current density of 2.0 mA cm(-2) in aqueous electrolyte), and excellent rate performance (88.7% retention at 8.0 mA cm(-2)). Furthermore, bracelet-shaped all-solid supercapacitor with fascinating cycling stability (96.6% retention after 10 000 cycles) and electrochemical stability (an almost negligible capacity loss under different bending states and 99.6% retention after 4000 bending cycles) is established by employing the graphene paper electrode material and polymer electrolyte. (C) 2017 Elsevier B.V. All rights reserved.