• 文献标题:   Boron and nitrogen Co-doped holey graphene aerogels with rich B-N motifs for flexible supercapacitors
  • 文献类型:   Article
  • 作  者:   ZOU XX, WU DP, MU YF, XING LY, ZHANG WC, GAO ZY, XU F, JIANG K
  • 作者关键词:   holey graphene, aerogel, doping, supercapacitor, flexible device
  • 出版物名称:   CARBON
  • ISSN:   0008-6223 EI 1873-3891
  • 通讯作者地址:   Henan Normal Univ
  • 被引频次:   6
  • DOI:   10.1016/j.carbon.2019.12.018
  • 出版年:   2020

▎ 摘  要

Boron and Nitrogen co-doped holey graphene aerogels (BN-HGA) are fabricated using ammonia borane as triple-functional precursor. The as-prepared BN-HGA possesses high specific surface area (249 m(2) g(-1)) and rich B-N motifs with high surface polarity, which contributes to the rich and stable redox sites for the enhanced pseudo-capacitance. Moreover, the high hydrogen content in the ammonia borane cultures a reducing environment to preserve the integrity of carbon matrix, which gives rise to the high electronic conductivity. In addition, the well-developed hierarchically porous structure facilitates the ion diffusion in the electrode. Thanks to these structural merits, the BN-HGA electrode furnishes good specific capacitance of 456 F g(-1) at 1 A g(-1) in three-electrode systems using sulfuric acid as electrolyte. Meanwhile, the all-solid-state flexible supercapacitors based on the symmetric BN-HGA electrodes demonstrate high specific capacitance (345 mF cm(-2) at 1 mA cm(-2)) and outstanding rate performance (80% retention at 20 mA cm(-2)). Furthermore, the flexible supercapacitor exhibits pleasant flexibility with marginable capacity loss as bent to arbitrary angles, which endows it a promising device for wearable energy storage. (C) 2019 Elsevier Ltd. All rights reserved.