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MnO−carbon-reduced graphene oxide composite with superior anode Li-ion storage performances

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Abstract

Manganous oxide (MnO)-based composites have motivated extensive researches as an anode electrode for lithium-ion storage due to the high theoretical capacity. Whereas, low cycling stability is the pivotal problem that retards the application of materials. Herein, a hydrothermal-annealing strategy is exploited to obtain the composite materials. The MnO nanoparticles (5–20 nm) wrapped by carbon shells to form core-shell structure are supported on the surface of reduced graphene oxide (rGO) sheets. The rGO flakes in electrode materials possess higher electrical conductivity, and improve the electro-conductibility and structural stability during charging-discharging process. Used as anode for lithium-ion batteries, the composite exhibits large reversible specific capacity (866 mA h g−1 at 0.2 C after 230 cycles) as well as a good cyclicity with a coulombic efficiency of 96%. The hydrothermal-annealing synthetic pathway opens up possibilities for designing and preparing novel electrode materials of lithium or other metallic ion batteries.

Manganous oxide (MnO)-based composites have motivated extensive researches as an anode electrode for lithium-ion storage due to the high theoretical capacity. Whereas, low cycling stability is the pivotal problem that retards the application of materials. Herein, a hydrothermal-annealing strategy is exploited to obtain the composite materials. The MnO nanoparticles (5–20 nm) wrapped by carbon shells to form core-shell structure are supported on the surface of reduced graphene oxide (rGO) sheets. The rGO flakes in electrode materials possess higher electrical conductivity, and improve the electro-conductibility and structural stability during charging-discharging process. Used as anode for lithium-ion batteries, the composite exhibits large reversible specific capacity (866 mA h g−1 at 0.2 C after 230 cycles) as well as a good cyclicity with a coulombic efficiency of 96%. The hydrothermal-annealing synthetic pathway opens up possibilities for designing and preparing novel electrode materials of lithium or other metallic ion batteries.

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Acknowledgments

Mrs. Fei Huang is appreciated for her assistance in the measurement process.

Funding

This study is financially supported by the National Natural Science Foundation of China (nos. 31530010, 21401168), the National Key Research and Development Program in the 13th Five-Year Projects of China (no. 2017YFD0601006), and the Special Project of Guangdong Province to Introduce Innovation and Entrepreneurship Team (no. 2016ZT06N467).

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Correspondence to Jianchun Jiang or Baojun Li.

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Liu, Y., Jiang, J., Sun, K. et al. MnO−carbon-reduced graphene oxide composite with superior anode Li-ion storage performances. J Nanopart Res 21, 109 (2019). https://doi.org/10.1007/s11051-019-4542-1

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  • DOI: https://doi.org/10.1007/s11051-019-4542-1

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