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Enhanced reversible capability of a macroporous ZnMn2O4/C microsphere anode with a water-soluble binder for long-life and high-rate lithium-ion storage

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Abstract

Among the many transition metal oxides, ZnMn2O4 provides relatively high theoretical capacity, low cost, low toxicity, and environmental friendliness for high-performance lithium-ion batteries. However, ZnMn2O4 suffers from limited cycle life, originating from poor electronic conductivity and huge volume change. In this work, ZnMn2O4/C consisting of many carbon layer-coated tiny nanoparticles, forming rough and macroporous microspheres, and microsphere anodes, with water-soluble sodium carboxymethyl cellulose or non-water-soluble poly(vinylidene fluoride), are characterized by electrochemical testing. As a result, the cell with water-soluble sodium carboxymethyl cellulose was shown to exhibit a high reversible capacity of 1249 mA h g−1 after 100 cycles at a low current density of 200 mA g−1. Even at a high current density of 500 mA g−1, it still retains a reversible capacity of 820 mA h g−1 after 500 cycles with a high coulombic efficiency, thus indicating its long life and high rate.

Graphical abstract: Enhanced reversible capability of a macroporous ZnMn2O4/C microsphere anode with a water-soluble binder for long-life and high-rate lithium-ion storage

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Publication details

The article was received on 22 Jan 2019, accepted on 23 Apr 2019 and first published on 23 Apr 2019


Article type: Research Article
DOI: 10.1039/C9QI00091G
Inorg. Chem. Front., 2019, Advance Article

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    Enhanced reversible capability of a macroporous ZnMn2O4/C microsphere anode with a water-soluble binder for long-life and high-rate lithium-ion storage

    H. Li, T. Yang, B. Jin, M. Zhao, E. Jin, S. Jeong and Q. Jiang, Inorg. Chem. Front., 2019, Advance Article , DOI: 10.1039/C9QI00091G

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