Engineering of Silicon Core-Shell Structures for Li-ion Anodes |
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Authors: | Bastien Rage Dr Diane Delbegue Dr Nicolas Louvain Dr Pierre-Emmanuel Lippens |
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Institution: | 1. ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France;2. Centre National d'Etudes Spatiales (CNES), Toulouse, France;3. ICGM, Univ Montpellier, CNRS, ENSCM, Montpellier, France
Réseau sur le Stockage Electrochimique de l'Energie (RS2E), FR CNRS 3459, Hub de l'Energie, Amiens, France |
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Abstract: | The amount of silicon in anode materials for Li-ion batteries is still limited by the huge volume changes during charge-discharge cycles. Such changes lead to the loss of electrical contacts, as well as mechanical and surface electrolyte interphase (SEI) instabilities, strongly reducing the cycle life. Core-shell structures have attracted a vast research interest due to the possibility of modifying some properties with a judicious choice of the shell. It is, for example, possible to improve the electronic conductivity and ionic diffusion, or buffer volume variations. This review gives a comprehensive overview of the recent developments and the different strategies used for the design, synthesis and electrochemical performance of silicon-based core-shells. It is based on a selection of the main types of silicon coatings reported in the literature, including carbon, inorganic, organic and double-layer coatings, Finally, a summary of the advantages and drawbacks of these different types of core-shells as anode materials for Li-ion batteries and some insightful suggestions in regards to their use are provided. |
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Keywords: | coatings core-shell structures lithium-ion batteries Si anodes surface protection |
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