Cycling profile of layered MgAl2O4/reduced graphene oxide composite for asymmetrical supercapacitor

Yong-Ping Gao; Zi-Bo Zhai; Qian-Qian Wang; Zhi-Qiang Hou; Ke-Jing Huang

doi:10.1016/j.jcis.2018.12.045

Cycling profile of layered MgAl₂O₄/reduced graphene oxide composite for asymmetrical supercapacitor

J Colloid Interface Sci. 2019 Mar 15:539:38-44. doi: 10.1016/j.jcis.2018.12.045. Epub 2018 Dec 12.

Authors

Yong-Ping Gao¹, Zi-Bo Zhai², Qian-Qian Wang¹, Zhi-Qiang Hou³, Ke-Jing Huang⁴

Affiliations

¹ College of Science and Technology, Xinyang College, Xinyang 464000, China.
² College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China.
³ School of Chemistry and Chemical Engineering, Zhou Kou Normal University, Zhou Kou 466001, China.
⁴ College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China. Electronic address: kejinghuang@163.com.

PMID: 30572288
DOI: 10.1016/j.jcis.2018.12.045

Abstract

To improve the ineluctable agglomeration and weak inherent conductivity of MgAl₂O₄ electrode materials, MgAl₂O₄/rGO composite is synthesized by a facile method and it shows large specific surface area and enhanced conductivity. Its particular framework can availably hold back the aggregation of MgAl₂O₄ and restacking of rGO, and accelerate reversible redox reactions. The MgAl₂O₄/rGO composite shows a specific capacity of 536.6 F/g at 1 A/g (257.3 F/g at 40 A/g) and retains 96.9% after 10,000 cycles at 5 A/g. An asymmetric supercapacitor is developed with MgAl₂O₄/rGO composite and activated carbon. An energy density of 16.2 Wh/kg is obtained at a power density of 400 kW/kg. Additionally, this device has successfully lighted up a LED, demonstrating its promising application in energy storage.

Keywords: Long cyclic stability; MgAl(2)O(4); Reduced graphene oxide; Supercapacitor.