1. Achieving Cycling Stability in Anode of Lithium-Ion Batteries with Silicon-Embedded Titanium Oxynitride Microsphere
- Author
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Sung Eun Wang, DoHoon Kim, Min Ji Kim, Jung Hyun Kim, Yun Chan Kang, Kwang Chul Roh, Junghyun Choi, Hyung Woo Lee, and Dae Soo Jung
- Subjects
lithium-ion batteries ,silicon anodes ,titanium oxynitrides ,spray-drying ,Chemistry ,QD1-999 - Abstract
Surface coating approaches for silicon (Si) have demonstrated potential for use as anodes in lithium-ion batteries (LIBs) to address the large volume change and low conductivity of Si. However, the practical application of these approaches remains a challenge because they do not effectively accommodate the pulverization of Si during cycling or require complex processes. Herein, Si-embedded titanium oxynitride (Si-TiON) was proposed and successfully fabricated using a spray-drying process. TiON can be uniformly coated on the Si surface via self-assembly, which can enhance the Si utilization and electrode stability. This is because TiON exhibits high mechanical strength and electrical conductivity, allowing it to act as a rigid and electrically conductive matrix. As a result, the Si-TiON electrodes delivered an initial reversible capacity of 1663 mA h g−1 with remarkably enhanced capacity retention and rate performance.
- Published
- 2022
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