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Multi-shelled LiMn1.95Co0.05O4 cages with a tunable Mn oxidation state for ultra-high lithium storage

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Abstract

Superior electrochemical performance of LiMn2O4 is considered to be one of the most important properties for lithium-ion batteries (LIBs). This paper presents an extremely high performance cathode material, multi-shelled LiMn1.95Co0.05O4 cages, which are created using a sucrose template. A small amount of Co substitution uniformly in a bulk material not only tunes Mn3+ in the minority with bulk stability improving, but can also accommodate specific capacity. In addition, the unique caged structure enhances Li+ diffusion and electrolyte penetration, leading to an outstanding rate capability. The as-synthesized cathode material exhibits a very high capacity of 154.4 mA h gāˆ’1, and retains a high value of 136.7 mA h gāˆ’1 after 500 cycles. The present work investigated the combined effect of a tunable average Mn oxidation state and unique multi-shelled cages in a controllable aerosol process.

Graphical abstract: Multi-shelled LiMn1.95Co0.05O4 cages with a tunable Mn oxidation state for ultra-high lithium storage

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Publication details

The article was received on 16 Nov 2017, accepted on 26 Jan 2018 and first published on 26 Jan 2018


Article type: Paper
DOI: 10.1039/C7NJ04457G
Citation: New J. Chem., 2018, Advance Article
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    Multi-shelled LiMn1.95Co0.05O4 cages with a tunable Mn oxidation state for ultra-high lithium storage

    L. Lu, Y. Hu, H. Jiang, Y. Wang, Y. Jiang, S. Huang, X. Niu, P. Biswas and C. Li, New J. Chem., 2018, Advance Article , DOI: 10.1039/C7NJ04457G

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