SiOx/C复合球作为高性能离子电池的阳极材料
Ho Jin Yoo1, Eun Mi Kim1,2, Sang Mun Jeong1,2
1Department of Chemical Engineering, Chungbuk National University, 1 Chungdae-ro, Seowon-Gu, Cheongju, Chungbuk 28644, Republic of Korea. jinenmei@chungbuk.ac.kr.
Nanoscale
|May 20, 2025
概括
子氧化 (SiOx) 和碳复合材料为离子电池提供高容量. 一种新的sol-gel方法确保了均的SiOx分布,提高了稳定性并减轻了用于实际储能量的体积膨胀.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 子氧化 (SiOx) 是离子电池的高容量阳极材料.
- 在循环时显著的体积膨胀限制SiOx实际应用.
- 在碳矩阵中实现均的SiOx分布是传统方法的挑战.
研究的目的:
- 开发一种制造均SiOx/C复合材料的方法.
- 提高SiOx基阳极的电化学性能和循环稳定性.
- 为了减轻SiOx阳极中的体积膨胀问题,用于先进的能量存储.
主要方法:
- 使用sol-gel方法制造SiOx/C复合材料.
- 使用了乙烯基三氧化和树脂/甲作为和碳前体.
- 合成的均球形多孔SiOx/C复合材料具有强大的Si-O-C键.
主要成果:
- 在碳矩阵内实现无形SiOx粒子的均分布.
- 显示出出色的缓冲性能和单分散球形结构.
- 在200个循环后,SiOx/C电极在2 A g-1下保持了660.2 mA hg-1的可逆容量.
- 在200个循环后,电极体积膨胀仅限于17.7%.
结论:
- 通过sol-gel合成的SiOx/C复合材料表现出优越的电化学性能和循环稳定性.
- 均的分布和强大的Si-O-C债券有效地减轻了体积膨胀.
- 这种方法显示出SiOx/C复合材料在下一代电池中的实际应用的巨大潜力.
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