期刊
CERAMICS INTERNATIONAL
卷 48, 期 8, 页码 11772-11778出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2022.01.036
关键词
Supercapattery; Carbon nanofibers; poly(3,4-ethylenedioxythiophene); Cobalt oxide
资金
- Universiti Putra Malaysia [GP-IPS/2018/9619300]
This research presents a new supercapattery technology with a positive electrode composed of porous functionalized carbon nanofibers (pfCNFs), poly(3,4-ethylenedioxythiophene) (PEDOT), and cobalt oxide (Co3O4). The composite exhibits a flower-like structure and demonstrates high specific capacity and cycling stability, showing great potential as an electrode for supercapattery.
Supercapattery epitomizes the next level of energy storage technology which demonstrates the pros of a supercapacitor and a battery. In this work, we developed a positive electrode of supercapattery comprised of porous functionalized carbon nanofibers (pfCNFs) as a template for the electrodeposition of poly(3,4-ethylenedioxythiophene) (PEDOT) and incorporation of cobalt oxide (Co3O4) through hydrothermal and annealing. Interestingly, the composite displays a flower-like structure observed on the fibers. The functionalized carbon nanofibers/poly(3,4-ethylenedioxythiophene)/cobalt oxide (pfCNFs/PEDOT/Co3O4) exhibited obvious redox peaks demonstrating its battery type property with high specific capacity (C-sp) and specific capacity (Cs) of 849.65 F g(-1) and 679.72 C g(-1), respectively. As for the real application, the positive electrode of pfCNFs/PEDOT/ Co3O4 and nitrogen-doped graphene as a negative electrode was assembled with a polyvinyl alcohol/potassium hydroxide gel used as a separator. The pfCNFs/PEDOT/Co3O4//NDG displayed specific energy of 14.54 Wh kg(-1) and specific power of 1726.96 W kg(-1) at 2 A g(-1). In addition, the device also exhibited remarkable cycling stability with 106.26% capacitance retention over 2000 cycles revealing its prospect as an electrode for supercapattery.
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