Freestanding RGO—Co3O4—PPy Composite Films as Electrodes for Supercapacitors

Jiang, Lili; Li, Youjian; Luo, Dan; Zhang, Qinyong; Cai, Fanggong; Wan, Guojiang; Xiong, Lu; Ren, Zhifeng

doi:10.1002/ente.201800606

Title: Freestanding RGO—Co₃O₄—PPy Composite Films as Electrodes for Supercapacitors

Journal Article · 30 October 2018 · Energy Technology

DOI: https://doi.org/10.1002/ente.201800606 · OSTI ID:1611547

Jiang, Lili ^[1]; Li, Youjian ^[2]; Luo, Dan ^[3]; Zhang, Qinyong ^[2]; Cai, Fanggong ^[2]; Wan, Guojiang ^[4]; Xiong, Lu ^[4];

^[3]

Xihua University, Chengdu (China); Univ. of Houston, TX (United States); DOE/OSTI
Xihua University, Chengdu (China)
Univ. of Houston, TX (United States)
Southwest Jiaotong University, Chengdu (China)

Supercapacitors are of great importance for energy storage and have been the subject of intensive research in recent years, in which conductive polymers are used to make flexible and freestanding electrodes. However, their insufficient access to the electrolytes and the low chemical stability of these conductive polymers lead to their poor performance. To solve these issues, a facile method that can be used to synthesize freestanding composite film electrodes of reduced graphene oxide–cobalt oxide–polypyrrole (RGO—Co₃O₄—PPy) as supercapacitors is demonstrated. They exhibit a high specific capacitance of 532.8 F g^-1 and nearly no degradation after 700 cycles of charging and discharging. The synergistic effect of Co₃O₄, RGO, and PPy is responsible for the superior property. The three-phase composite electrode utilizes the RGO nanosheet as a substrate to provide a large surface area for loading Co₃O₄ nanoparticles and also to enhance the electron transfer. Further, the deposition of PPy largely reduces the resistivity of RGO—Co₃O₄—PPy, and the introduction of Co₃O₄ nanoparticles significantly improves cycle stability.

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Research Organization:: University of Houston, TX (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: SC0010831

OSTI ID:: 1611547

Journal Information:: Energy Technology, Journal Name: Energy Technology Journal Issue: 3 Vol. 7; ISSN 2194-4288

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Electrochemical Performance of Free‐Standing and Flexible Graphene and TiO ₂ Composites with Different Conductive Polymers as Electrodes for Supercapacitors Jiang, Lili; Luo, Dan; Zhang, Qinyong Chemistry – A European Journal, Vol. 25, Issue 33 https://doi.org/10.1002/chem.201900399	journal	April 2019
Recent Advance in Co3O4 and Co3O4-Containing Electrode Materials for High-Performance Supercapacitors Wang, Xuelei; Hu, Anyu; Meng, Chao Molecules, Vol. 25, Issue 2 https://doi.org/10.3390/molecules25020269	journal	January 2020

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Title: Freestanding RGO—Co₃O₄—PPy Composite Films as Electrodes for Supercapacitors