Abstract
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.
Original language | English |
---|---|
Pages (from-to) | 478-482 |
Number of pages | 5 |
Journal | Journal of Alloys and Compounds |
Volume | 800 |
DOIs | |
Publication status | Published - 2019 Sep 5 |
Keywords
- Aqueous Zn-ion batteries
- Cathode materials
- Microspheres
- Spinel structures
- Zinc manganese oxides
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry