释放丰富的基氧化物的潜力,用于高速可充电离子电池
Yali Yang1, Chuan Gao1, Tie Luo1
1Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials, School of Materials Science and Engineering, Peking University, Beijing, 100871, P. R. China.
Advanced materials (Deerfield Beach, Fla.)
|September 10, 2023
概括
研究人员开发了一种新的丰富的基氧化物阴极材料,用于高能量密度的离子电池. 这种材料具有准三维的离子扩散通道,增强速率能力和结构稳定性,以提高电池性能.
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:
- 富含的基于的氧化物对高能量密度的离子电池具有前景.
- 关键的挑战包括低速率能力和电压衰减.
研究的目的:
- 为了合成具有增强的离子扩散通路的丰富材料.
- 为了提高丰富的正极材料的速率能力和循环稳定性.
主要方法:
- 引入双胞胎结构以创建准三维的离子扩散通道.
- 合成单分散的微米大小的初级粒子.
主要成果:
- 在0.1°C时达到303 mAh g-1的特定容量,在1°C时达到253 mAh g-1的特定容量.
- 在1°C的200个循环后,由于抑制了离子迁移,证明了85%的容量保留.
- 双胞胎结构作为一个"断水",增强了结构稳定性.
结论:
- 准3D通道策略有效地改善了离子扩散和结构完整性.
- 这种方法为开发先进的分层氧化物阴极提供了新的方向.
- 下一代电池的工业应用潜力.
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