Volume 8, Issue 1 1900923
Full Paper

A Simple Glucose-Blowing Approach to Graphene-Like Foam/NiO Composites for Asymmetric Supercapacitors

Chengen He

Chengen He

Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central University for Nationalities, Wuhan, 430074 China

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Yulin Jiang

Yulin Jiang

Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central University for Nationalities, Wuhan, 430074 China

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Xiaofang Zhang

Xiaofang Zhang

Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central University for Nationalities, Wuhan, 430074 China

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Xun Cui

Xun Cui

Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central University for Nationalities, Wuhan, 430074 China

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Yingkui Yang

Corresponding Author

Yingkui Yang

Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education & Hubei Key Laboratory of Catalysis and Materials Science, South-Central University for Nationalities, Wuhan, 430074 China

Hubei Engineering Technology Research Centre of Energy Polymer Materials, School of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan, 430074 China

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First published: 14 September 2019
Citations: 14

Abstract

The glucose-blowing approach is facile and efficient in producing graphene-like materials with large specific surface area, good conductivity, and yet low cost. Herein, a graphene-like foam/NiO (GLF/NiO) composite is synthesized by a one-step glucose-blowing method at a relatively low carbonization temperature of 650 °C with the assistance of Ni(NO3)2. Especially, Ni(NO3)2 is used as a blowing agent of glucose and also a precursor of NiO. The resulting GLF/NiO composite exhibits an interconnected foam-like structure with a large specific surface area (323 m2 g−1). The as-fabricated supercapacitor electrode delivers a specific capacitance as high as 539 F g−1 at 1 A g−1, which is much higher than that of neat GLF (147 F g−1) using NH4Cl as the blow agent in the absence of Ni(NO3)2. The asymmetric supercapacitor is further assembled using GLF/NiO as the positive electrode and GLF as the negative electrode, respectively. The cell shows a high specific capacitance up to 152 F g−1 and an energy density of 47.6 W h kg−1 at the power density of 750 W kg−1. Herein, an appealing approach to the facile fabrication of carbon-based oxide nanocomposites for high-performance electrochemical energy storage is proposed.

Conflict of Interest

The authors declare no conflict of interest.

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