Comparative study on ternary spinel cathode Zn–Mn–O microspheres for aqueous rechargeable zinc-ion batteries

• Published in: Journal of alloys and compounds Vol. 800; pp. 478 - 482
• Main Authors: Lee, Jae-Wan, Seo, Seung-Deok, Kim, Dong-Wan
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 05.09.2019; Elsevier BV
• Subjects: Aqueous Zn-ion batteries; Cathode materials; Cathodes; Cations; Comparative studies; Electrochemical analysis; Microspheres; Morphology; Nanoparticles; Rechargeable batteries; Size distribution; Spinel structures; Storage batteries; Zinc compounds; Zinc manganese oxides; Microspheres; Aqueous Zn-ion batteries; Cathode materials; Spinel structures; Zinc manganese oxides
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2019.06.051

We demonstrate the cation ratio-controlled synthesis of ZnMn2O4 and Zn1.67Mn1.33O4 aggregated microspheres. The carbonate precursor was synthesized by a solvothermal reaction, and then completely converted to oxide by calcination at 600 °C with a controlled cationic ratio. The prepared ternary oxide has a nanoparticle-aggregated morphology and uniform size distribution. The electrochemical properties were investigated by cyclic voltammetry and constant current charge-discharge measurements. The Zn1.67Mn1.33O4 electrode reveals better performance for Zn2+ storage than the other, delivering 175 mA h g−1 after 40 cycles. After the electrochemical test, ex situ analysis was conducted to identify the Zn2+ storage mechanisms. From these results, we confirm that the Zn1.67Mn1.33O4 cathode is a promising Zn2+ storage material for environmental friendly aqueous rechargeable Zn-ion batteries. [Display omitted] •Facile preparation of Zn–Mn–O based spinel nanostructures with different cation ratios.•Fabrication of nanoparticle-aggregated microspheres by a solvothermal reaction.•Highly reversible Zn storage capability in Zn1.67Mn1.33O4 microspheres for aqueous batteries.