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Free-standing Li1.2Mn0.54Ni0.13Co0.13O2/MWCNTs framework for high-energy lithium-ion batteries

Abstract

Free-standing Li1.2Mn0.54Ni0.13Co0.13O2/MWCNTs (LLO/MWCNTs) framework electrodes have been successfully fabricated for high energy density lithium-ion batteries. By constructing 3D conductive network, the LLO/MWCNTs cells exhibit superior electrochemical performances. Specifically, LLO/MWCNTs cells achieve a high initial discharge capacity of 318.2 mAh g-1 at 0.1 C (1 C=250 mA g-1) with a coulombic efficiency of 91.1%. After 200 cycles at 1 C, LLO/MWCNTs cells can still deliver 209.2 mAh g-1, corresponding to a capacity retention of 95.9%. Furthermore, LLO/MWCNTs electrode can still deliver high discharge capacity of 121.6 mAh g-1 after 500 cycles at 10 C. Compared with conventional electrodes, the free-standing LLO/MWCNTs electrodes can yield up 47% reduction in total weight while the active materials have been raised 2 times. By combining the high capacity Li1.2Mn0.54Ni0.13Co0.13O2 cathodes and the superiority of the free-standing structure, the energy density of lithium-ion batteries can be highly enhanced and this design holds great potential to be used with future electronic devices.

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Publication details

The article was received on 31 Aug 2018, accepted on 05 Oct 2018 and first published on 05 Oct 2018


Article type: Research Article
DOI: 10.1039/C8QI00926K
Citation: Inorg. Chem. Front., 2018, Accepted Manuscript
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    Free-standing Li1.2Mn0.54Ni0.13Co0.13O2/MWCNTs framework for high-energy lithium-ion batteries

    C. Lv, Y. Peng, J. Yang, C. Liu, X. Duan, J. Ma and T. Wang, Inorg. Chem. Front., 2018, Accepted Manuscript , DOI: 10.1039/C8QI00926K

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