Hydrothermal regulation of MnO2 on a wood-based RGO composite for achieving wide voltage windows and high energy density supercapacitors
Xiaofei Shan,
Li Wang,
Lili Li,
Ya Zuo,
Zhenghua Fu,
Jing Wu,
Zhe Wang,
Xiaotao Zhang,
Ximing Wang
Affiliations
Xiaofei Shan
School of Materials Science and Art Design, Inner Mongolia Agricultural University, Saihan District, Hohhot City, Inner Mongolia Autonomous Region 010010, China
Li Wang
Inner Mongolia University of Science and Technology, Kundulun District, Baotou City, Inner Mongolia Autonomous Region 014017, China
Lili Li
School of Materials Science and Art Design, Inner Mongolia Agricultural University, Saihan District, Hohhot City, Inner Mongolia Autonomous Region 010010, China
Ya Zuo
College of Science, Inner Mongolia Agricultural University, Saihan District, Hohhot City, Inner Mongolia Autonomous Region 010010, China
Zhenghua Fu
Lufumei Furniture Co., Ltd, Baotou City, Inner Mongolia Autonomous Region 014017, China
Jing Wu
School of Materials Science and Art Design, Inner Mongolia Agricultural University, Saihan District, Hohhot City, Inner Mongolia Autonomous Region 010010, China
Zhe Wang
School of Materials Science and Art Design, Inner Mongolia Agricultural University, Saihan District, Hohhot City, Inner Mongolia Autonomous Region 010010, China; Corresponding author
Xiaotao Zhang
College of Science, Inner Mongolia Agricultural University, Saihan District, Hohhot City, Inner Mongolia Autonomous Region 010010, China; Corresponding author
Ximing Wang
School of Materials Science and Art Design, Inner Mongolia Agricultural University, Saihan District, Hohhot City, Inner Mongolia Autonomous Region 010010, China; Corresponding author
Summary: The increasing need for improved energy storage devices renders it particularly important that inexpensive electrodes with high capacitance, excellent cycling stability, and environment-friendly characteristics are developed. In this study, a wood-derived carbon@reduced graphene (WRG) conductive precursor with an average conductivity of 15.38 S/m was firstly synthesized. The binder-free WRG-MnO2 electrode was successfully constructed by growing MnO2 onto a WRG under hydrothermal conditions. The asymmetric supercapacitor assembled with the WRG-20MnO2 cathode exhibited excellent electrochemical capacitive behavior with a voltage window of 0–2 V, maximum energy density of 52.3 Wh kg−1, and maximum power density of 1642.7 W kg−1, which is mainly due to the distinctive icicle-shaped structure of the MnO2. Thus, a facile strategy for developing high-performance hierarchical porous carbon electrodes that can be used in supercapacitors was developed herein, which may provide new opportunities to improve the high added value of poplar wood.
