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Open AccessReview

Yolk–Shell Nanostructures: Syntheses and Applications for Lithium-Ion Battery Anodes

Dongnam Regional Division, Korea Institute of Industrial Technology, Busan 46938, Korea
Nanomaterials 2020, 10(4), 675; https://doi.org/10.3390/nano10040675
Received: 6 March 2020 / Revised: 25 March 2020 / Accepted: 2 April 2020 / Published: 3 April 2020
(This article belongs to the Special Issue Novel Nanomaterials for Applications in Energy and Catalysis)
Yolk–shell nanostructures have attracted tremendous research interest due to their physicochemical properties and unique morphological features stemming from a movable core within a hollow shell. The structural potential for tuning inner space is the focal point of the yolk–shell nanostructures in a way that they can solve the long-lasted problem such as volume expansion and deterioration of lithium-ion battery electrodes. This review gives a comprehensive overview of the design, synthesis, and battery anode applications of yolk–shell nanostructures. The synthetic strategies for yolk–shell nanostructures consist of two categories: templating and self-templating methods. While the templating approach is straightforward in a way that the inner void is formed by removing the sacrificial layer, the self-templating methods cover various different strategies including galvanic replacement, Kirkendall effect, Ostwald ripening, partial removal of core, core injection, core contraction, and surface-protected etching. The battery anode applications of yolk–shell nanostructures are discussed by dividing into alloying and conversion types with details on the synthetic strategies. A successful design of yolk–shell nanostructures battery anodes achieved the improved reversible capacity compared to their bare morphologies (e.g., no capacity retention in 300 cycles for [email protected] yolk–shell vs. capacity fading in 10 cycles for [email protected] core–shell). This review ends with a summary and concluding remark yolk–shell nanostructures. View Full-Text
Keywords: yolk–shell; templating; self-templating; battery anode; nanomaterial yolk–shell; templating; self-templating; battery anode; nanomaterial
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Moon, G.D. Yolk–Shell Nanostructures: Syntheses and Applications for Lithium-Ion Battery Anodes. Nanomaterials 2020, 10, 675.

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