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Rational Design of MnCo2O4@NC@MnO2 Three-Layered Core-Shell Octahedron for High-Rate and Long-Life Lithium Storage

Abstract

With the depletion of fossil energy and rapid development of electronic equipment, the commercial lithium-ion batteries (LIBs) do not meet the current energy demand. It is urgent to develop novel LIBs with high capacity, long life, and low cost. In this work, we design and synthesize MnCo2O4@NC@MnO2 three-layered core-shell octahedron with good electrochemical performance by binary transition metal oxide (MnCo2O4), N-doped carbon (NC), and high-capacity manganese oxide (MnO2). At the same time, the three-layered structure is effective to relieve the volume expansion, improve the electronic conductivity, and strengthen the structural stability. MnCo2O4@NC@MnO2 three-layered core-shell octahedron displays a high discharge capacity of 894 mAh g–1 at a current density of 500 mA g–1 after 120 cycles. Even at a high current density of 1000 mA g–1, the discharge capacity also remains at 839 mAh g–1 after 600 cycles. As well as, this material possesses pretty good rate performance. All the results show that this ternary composite is a kind of good anode alternate for lithium storage.

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Publication details

The article was received on 02 Aug 2018, accepted on 11 Sep 2018 and first published on 13 Sep 2018


Article type: Paper
DOI: 10.1039/C8DT03148G
Citation: Dalton Trans., 2018, Accepted Manuscript
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    Rational Design of MnCo2O4@NC@MnO2 Three-Layered Core-Shell Octahedron for High-Rate and Long-Life Lithium Storage

    P. Huang, M. Zhao, B. Jin, H. Li, Z. Zhu, L. Jiang and Q. Jiang, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT03148G

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