Effect of Acid Leaching on Silicon Nanoparticles and Their Electrochemical Performance in Lithium-Ion Batteries.

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ID: 41099
2020
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Abstract
In this work, crystalline Si nanoparticles are synthesized on a large scale via a low temperature molten salt method. The crystal morphologies and electrochemical properties of the samples after HCl and HF leaching are studied in detail. The electrochemical properties of the as-produced silicon samples, which are used as anode materials in lithium-ion batteries (LIBs), are evaluated. The final product, which contains more Si and less SiO², improves cyclic stability because it buffers the volumetric effect of Si during lithiation/delithiation. The HF acid leach removes the impurity of SiO². However, the prepared sample exhibits lower electrochemical properties. The sample with a low SiO² content can deliver a capacity of 1503 mAh g after 50 cycles at a higher current density of 1 A g, and the Coulombic efficiency is approximately 100%. However, the sample after HF acid leaching only delivers a discharge capacity of 389 mAh g at 1 A g after 50 cycles.
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sun2020effectjournal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Sun, Rui;Xu, Hui;Hang, Shuijin;Yang, Yang;Li, Weili;Yang, Liuqing;Yang, Gang;
Journal Journal of nanoscience and nanotechnology
Year 2020
DOI
10.1166/jnn.2020.17378
URL
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