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| High-capacity and long-cycle carbon-coated SiO anode materials for high-performance lithium-ion batteries |
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Received:August 08, 2025
Revised:September 16, 2025
Accepted:October 24, 2025
Published Online:April 30, 2026
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| DOI：10.3969/j.issn.1005-7854.2026.02.018 |
| KeyWord:lithium-ion battery;SiO anode;carbon coating;chemical vapor deposition;long-cycle |
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1.Minmetals Exploration and Development Co., Ltd., Beijing 100010, China;2.China Minmetals (Heilongjiang)
Graphite Industry Co., Ltd., Hegang 154101, Heilongjiang, China |
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| Abstract: |
| Lithium-ion batteries have become an important energy storage method in the new energy industry due to their high efficiency and sustainability. Despite their advantages, the theoretical specific capacity of the commonly used graphite anode is only 372 mAh·g?1. Silicon oxide (SiO) with a higher theoretical specific capacity has emerged as a promising candidate. However, challenges such as poor electrical conductivity and significant volume expansion hinder its practical application. This study addresses these challenges by applying surface carbon coating modification by chemical vapor deposition (CVD). This method significantly enhances the electrochemical properties of SiO material by optimizing key process parameters. Detailed analysis reveals that the carbon-coated SiO exhibits remarkable electrochemical performance, achieving a specific charge-discharge capacity of 1 437.1/1 894.2 mAh·g?1, an initial coulombic efficiency of 75.87%, and a stable reversible capacity of 1 096.2 mAh·g?1 over 130 cycles. This study not only demonstrates the effectiveness of CVD in improving SiO-based anodes but also offers comprehensive insights into the optimization of process parameters and their impact on material properties. These findings pave the way for further advancements in lithium-ion battery technology, highlighting the potential of SiO as a key material in meeting the future demands of the energy sector. |
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