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Paredes Camacho, Ramon A.; Wu, Ai-Min; Jin, Xiao-Zhe; Dong, Xu-Feng; Li, Xiao-Na; Huang, Hao
Journal of power sources, 10/2019, Letnik: 437Journal Article
Despite possessing a high theoretical capacity, MnS has a rather complex lithium kinetic diffusion and poor mechanical stability that hinders its application in energy storage devices like lithium-ion batteries. This study is focused on overcoming the drawbacks of MnS anode material by assembling a carbon-constraint MnS nanocomposite in a core-shell configuration. This structure is obtained by a simple route involving DC plasma evaporation of Mn@C nanoparticles and posterior thermal sulfurization process. As anode material in a Li-ion battery, MnS@C-300 attains high specific capacity of 890 mAh g−1 after 500 cycles at 500 mA g−1. It also shows remarkable high rate capability with capacity values of 705, 684, 643, 578, and 495 mAh g−1 at current densities of 100, 200, 500, 1000, and 2000 mA g−1, respectively. This exceptional electrochemical response is endorsed to the synergetic effect of the smart design of a core-shell architecture. The carbonaceous shell enhances the lithium-ion diffusion towards the active MnS core and preserves structural stability during the long cycling process. Display omitted •Simple plasma evaporation and sulfuration are used to produce MnS@C nanocomposites.•Carbon constraint avoids the sintering of MnS nanoparticles during synthesis.•Core-shell structure provides outstanding stability and lithium storage properties.•High capacitive contribution generates excellent high-rate capability results.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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