Multi-Shelled LiMn₁.₉₅Co₀.₀₅O₄ Cages with a Tunable Mn Oxidation State for Ultra-High Lithium Storage
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 g-1, and retains a high value of 136.7 mA h g-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.
L. Lu et al., "Multi-Shelled LiMn₁.₉₅Co₀.₀₅O₄ Cages with a Tunable Mn Oxidation State for Ultra-High Lithium Storage," New Journal of Chemistry, vol. 42, no. 5, pp. 3953-3960, Royal Society of Chemistry, Mar 2018.
The definitive version is available at https://doi.org/10.1039/c7nj04457g
Civil, Architectural and Environmental Engineering
Keywords and Phrases
Cobalt; electrolyte solution; Lithium; Manganese; Nanocage; Oxygen; Sucrose; Adsorption; Article; Controlled study; Crystal structure; Desorption; Diffusion; Electric capacitance; Electrochemical analysis; Energy dispersive X ray spectroscopy; Field emission scanning electron microscopy; Molecular stability; Oxidation; Priority journal; Pyrolysis; Storage; Substitution reaction; Synthesis; Thermogravimetry; Transmission electron microscopy; X ray photoelectron spectroscopy; X ray powder diffraction
International Standard Serial Number (ISSN)
Article - Journal
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