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Issue 40, 2018
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Design and preparation of three-dimensional MnO/N-doped carbon nanocomposites based on waste biomass for high storage and ultra-fast transfer of lithium ions

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Abstract

Batteries with fast charging capability are urgently needed to meet the rapidly increasing demand for energy storage devices. For a lithium-ion battery (LIB), the anode materials hinder the realization of fast charging. Herein, we report a three-dimensional (3D) MnO nanoparticle (NP) N-doped lychee exocarp flaky carbon (MnO@NLEFC) based on biomass waste lychee exocarp for ultra-fast chargeable LIB anode materials. The rational design of using the redox reaction of lychee exocarp (cellulose, hemicellulose, lignin, etc.) and KMnO4 to generate a large number of MnOx nanoparticles on the surface of the lychee exocarp and then pyrolysis with the supplemented nitrogen source melamine can successfully realize the preparation of three-dimensional MnO@NLEFC. MnO nanoparticles inlaid in the carbon-based material not only improve the storage capacity of Li+, but also significantly increase the spacing of carbon layers and the disordered degree of carbon, which largely reduces the resistance for Li+ migration and thereby accelerates the rates of insertion and extraction of Li+. Due to these factors, MnO@NLEFC exhibits a high reversible capacity of 515.5 mA h g−1 after 1000 cycles at 2 A g−1 as the anode for a Li-ion battery. Even at an ultra-high current density of 20 A g−1, it can still deliver a high reversible capacity of 309.2 mA h g−1 after 1000 cycles with an efficiency over 95%, showing superior fast-charging capability.

Graphical abstract: Design and preparation of three-dimensional MnO/N-doped carbon nanocomposites based on waste biomass for high storage and ultra-fast transfer of lithium ions

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Publication details

The article was received on 23 Jul 2018, accepted on 18 Sep 2018 and first published on 18 Sep 2018


Article type: Paper
DOI: 10.1039/C8TA07096B
Citation: J. Mater. Chem. A, 2018,6, 19479-19487

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    Design and preparation of three-dimensional MnO/N-doped carbon nanocomposites based on waste biomass for high storage and ultra-fast transfer of lithium ions

    Q. Feng, H. Li, Z. Tan, Z. Huang, L. Jiang, H. Zhou, H. Pan, Q. Zhou, S. Ma and Y. Kuang, J. Mater. Chem. A, 2018, 6, 19479
    DOI: 10.1039/C8TA07096B

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