Achieving Cycling Stability in Anode of Lithium-Ion Batteries with Silicon-Embedded Titanium Oxynitride Microsphere

Author:

Wang Sung EunORCID,Kim DoHoon,Kim Min Ji,Kim Jung Hyun,Kang Yun Chan,Roh Kwang Chul,Choi JunghyunORCID,Lee Hyung WooORCID,Jung Dae Soo

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.

Funder

National R&D Program through the National Research Foundation of Korea funded by the Ministry of Science and ICT

Ministry of Trade, Industry and Energy

Publisher

MDPI AG

Subject

General Materials Science,General Chemical Engineering

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