先进的多孔SiOx/PAA微架构:对高容量和超稳定阳极的可持续方法
Jiahong Fan1,2, Siwei Jiang1,2, Yazecheng Liu1,2
1National and Local Joint Engineering Research Center for Lithium-ion Batteries and Materials Preparation Technology, Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China.
ACS applied materials & interfaces
|May 12, 2025
概括
回收的子氧化物 (SiOx) 废物被转化为球形多孔SiOx/多烯酸 (PAA) 微粒. 这些新的阳极材料为下一代电池提供了增强的稳定性和高容量.
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
- 纳米技术纳米技术
背景情况:
- 子氧化物 (SiOx) 是电池的一个有前途的阳极材料,因为它具有较高的理论容量和较低的体积膨胀,与相比.
- 的工业生产产生了大量的亚微废物,需要可持续的再利用策略.
- 现有的SiOx阳极在电化学循环过程中面临粉碎和容量色的挑战.
研究的目的:
- 开发一种经济,高效和可持续的方法,用于再利用亚微SiO废物.
- 为提高电池阳极性能设计球形多孔SiOx/多烯酸 (PAA) 微粒.
- 为了提高基于SiOx的阳极材料的弹性和电化学稳定性.
主要方法:
- 使用喷雾干燥工艺从亚微小SiO废物中合成球形多孔SiOx/PAA微粒.
- 研究了聚烯酸 (PAA) 涂层在通过结合提供机械强度和粘合力的作用.
- 进行半细胞和全细胞电化学测试,以评估性能指标,包括容量,效率和循环稳定性.
主要成果:
- 合成的SiOx/PAA微粒与微微SiOx相比,显示出更高的初始容量效率 (68%).
- 在半细胞测试中,在200个循环中,在半细胞测试中实现了高可逆容量1102 mAh g-1的最小色 (0.036%每周期).
- 证明了令人印象深刻的超长循环稳定性,在1000个循环后保持超过200mAhg-1的容量,并在完整的电池中 (1600个循环内160.25mAhg-1) 提供实用的性能.
结论:
- 喷雾干燥方法有效地将SiO废物转化为高性能阳极材料.
- PAA涂层显著提高SiOx阳极的机械完整性和电化学稳定性,减轻粉碎.
- 开发的微型SiOx/PAA阳极由于其卓越的性能和可持续性,显示了工业应用的巨大潜力.
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