1. Design of Boron Carbonitrides-Polyaniline (BCN-PANI) assembled supercapacitor with high voltage window.
- Author
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Shi, Dong, Yang, Mingzhi, Zhang, Baoguo, Hu, Haixiao, Ai, Zizheng, Shao, Yongliang, Shen, Jianxing, Wu, Yongzhong, and Hao, Xiaopeng
- Subjects
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ENERGY storage , *SUPERCAPACITORS , *ENERGY density , *ENERGY conversion , *BORON , *ENERGY development , *HIGH voltages - Abstract
Exfoliation process, PANI modification, and utilization of Et4N·BF4 electrolyte help construct a superior BCN-PANI-based supercapacitor device with a wide working voltage that is 3 times that of a pure PANI device. [Display omitted] • Efficient exfoliation improves the electrochemical performance. • PANI modification effectively boosts the capacitive reaction. • BCN help increase the voltage widow 3 times that of PANI device in Et 4 N·BF 4 electrolyte. Boron carbonitrides (BCN) have been widely concerned in the field of energy storage and conversion. However, the energy storage mechanism of electrical double-layer behavior and their stacked-layer structure severely limit the improvement of capacitance, thereby hindering their further development in energy storage. Therefore, an ultrasonic-ball milling method was first chosen to obtain BCN nanosheets, together with a feasible way of polyaniline (PANI) modification performed to boost the capacitive reaction of BCN nanosheets. For the first time, a BCN-PANI-based symmetric supercapacitor device can reach a high voltage window of 3.0 V when 1 M Et 4 N·BF 4 was chosen as the electrolyte. The working voltage of 3.0 V is three times that of a device with pure PANI with the ultrahigh energy density of 67.1 W h kg−1, superior to most of the reported PANI-based devices. The eminent electrochemical performance provides a promising strategy to pave the way for configuring carbon-based multiple composite electrodes for other energy storage devices. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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