Synthesis and Electrochemical Properties of Zn(Mn2-xFex)O4 Cathode Materials for Hybrid Supercapacitors

Hyeon-Uk Ko; Sang-Shik Park

doi:10.3740/MRSK.2026.36.3.85

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2026 Vol.36, Issue 3 Preview Page Next Page

Research Paper

Synthesis and Electrochemical Properties of Zn(Mn_2-xFe_x)O₄ Cathode Materials for Hybrid Supercapacitors

27 March 2026. pp. 85-95

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Abstract

Spinel-structured ZnMn₂O₄ has attracted considerable attention as a promising material for supercapacitors and other secondary energy storage devices due to its environmental friendliness, low toxicity, and decent electrochemical performance. However, its practical application is hindered by intrinsic drawbacks such as low electrical conductivity and manganese dissolution from the crystal lattice. In the present study, these limitations are addressed by partially substituting Mn with Fe to form Zn(Mn_2-xFe_x)O₄ (where x = 0.4, 0.8, 1.2, or 1.6). This material was synthesized via a hydrothermal method and subsequently fabricated into electrodes for use in hybrid supercapacitor devices. Electrochemical analysis using a three-electrode system revealed that Zn(Mn_1.2Fe_0.8)O₄ has the highest specific capacitance of 374 F/g at a current density of 0.1 A/g, with a b-value of 0.811, thereby indicating a highly capacitive-dominant energy storage mechanism. When applied in a full hybrid supercapacitor device, the system achieved a specific capacitance of 121.44 F/g at 0.1 A/g, and retained 70 % of its capacitance after 1,000 charge-discharge cycles at 1 A/g. These results demonstrate the potential of Zn(Mn_2-xFe_x)O₄ as a viable electrode material for high-performance hybrid supercapacitors.

Keywords

hybrid supercapacitors

Zn(Mn_2-xFe_x)O₄

hydrothermal method

cyclic voltammetry

specific capacitance.

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Information

Publisher :Materials Research Society of Korea
Publisher(Ko) :한국재료학회
Journal Title :Korean Journal of Materials Research
Journal Title(Ko) :한국재료학회지
Volume : 36
No :3
Pages :85-95
Received Date : 2026-01-13
Revised Date : 2026-02-12
Accepted Date : 2026-02-14
DOI :https://doi.org/10.3740/MRSK.2026.36.3.85

Korean Journal of Materials Research ISSN:1225-0562(Print) 2287-7258(Online) 한국재료학회지

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