合理调节高压稳定性在层氧化物阴极中的高压稳定性
Lichen Wu1,2, Hongwei Fu1,2, Wang Lyu1,2
1School of Physics and Electronics, Hunan University, Changsha 410082, China.
ACS nano
|May 10, 2024
概括
协同兴奋剂和现场扩散增强了分层的氧化物阴极. 这一策略抑制了溶解和氧气损失,改善了可充电电池的电池性能和循环寿命.
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:
- 层状氧化物阴极在高压循环过程中面临氧气损失,相位过渡和金属溶解等挑战.
- 这些问题大大降低了可充电电池的电化学性能.
研究的目的:
- 通过提出协同作用的兴奋剂和现场电化学扩散策略来应对分层氧化物阴极的挑战.
- 提高离子层氧化物阴极的稳定性和电化学性能.
主要方法:
- 与非金属元素,特别是和的协同兴奋剂.
- 在充电后在现场电化学扩散到散装材料中.
- 修改后的K0.5Mn0.83Mg0.1Ti0.05B0.02F0.1O1.9分层氧化物阴极的特性.
主要成果:
- 兴奋剂调节了的分布,丰富了表面,抑制了的溶解.
- 在现场扩散减少了离子扩散能量障碍,并抑制了氧气损失.
- 修改后的阴极在50 mA g-1下达到147 mAh g-1的容量,在500 mA g-1.1下达到2200个周期.
结论:
- 协同兴奋剂和现场电化学扩散是优化分层氧化物阴极材料的有效策略.
- 这些发现为设计具有增强稳定性和性能的先进可充电电池材料提供了宝贵的见解.
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