Review Article


2019, 12(8): 1739–1749


Strategies for improving the storage performance of silicon-based anodes in lithium-ion batteries

Wei Tao1, Ping Wang1, Ya You2, Kyusung Park2, Cao-Yu Wang1, Yong-Ke Li1, Fei-Fei Cao1 (*), and Sen Xin2 (*)

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1 College of Science, Huazhong Agricultural University, Wuhan 430070, China
2 Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712, USA

Keywords: silicon anode, lithium-ion battery, silicon/carbon composites, silicon/non-carbon composites, silicon oxide
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  • Abstract
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Silicon has attracted much attention as a promising anode material for lithium-ion batteries (LIBs) due to its high theoretical capacity and rich resource abundance. However, the practical battery use of Si is challenged by its low conductivity and drastic volume variation during the Li uptake/release process. Tremendous efforts have been made on shrinking the particle size of Si into nanoscale so that the volume variation could be accommodated. However, the bare nano-Si material would still pulverize upon (de)lithiation. Moreover, it shows an excessive surface area to invite unlimited growth of solid electrolyte interface that hinders the transportation of charge carriers, and an increased interparticle resistance. As a result, the Si nanoparticles gradually lose their electrical contact during the cycling process, which accounts for poor thermodynamic stability and sluggish kinetics of the anode reaction versus Li. To address these problems and improve the Li storage performance of nano-Si anode, proper structural design should be applied on the Si anode. In this perspective, we will briefly review some strategies for improving the electrochemistry versus Li of nano-Si materials and their derivatives, and show opinions on the optimal design of nanostructured Si anode for advanced LIBs.
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Strategies for improving the storage performance of silicon-based anodes in lithium-ion batteries. Nano Res. 2019, 12(8): 1739–1749

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