通过LiB2O4涂层和同步B兴奋剂来增强LiMn2O4阴极材料稳定性
Rui Wu1,2, Xiangyun Qiu1,2, Jilei Du3
1Power & Energy Storage System Research Center, Qingdao University, No. 308 Ningxia Road, Qingdao 266071, China.
Langmuir : the ACS journal of surfaces and colloids
|April 29, 2025
概括
将氧化 (LMO) 涂上酸 (LiB3O5),显著提高了电池的性能. 2%的LiB3O5涂层增强容量保留和循环稳定性,特别是在更高的温度下.
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:
- 脊柱氧化 (LMO) 是离子电池的成本效益高的阴极材料.
- 由于LMO的容量减弱,特别是在高温下,这限制了其实际使用.
研究的目的:
- 为了提高LMO阴极材料的循环稳定性和高温性能.
- 调查酸 (LiB3O5) 作为LMO表面涂层的有效性.
主要方法:
- 使用一种简单的表面涂层方法,将LiB3O5涂在LMO颗粒上.
- 通过在不同温度 (25°C和55°C) 和速度 (1°C) 的循环测试来评估电化学性能.
- 进行了材料表征,以了解性能增强的潜在机制.
主要成果:
- 2%的LiB3O5涂层LMO (2%LBO@LMO) 与未涂层LMO相比,表现出更好的容量保留.
- 在300个循环后的25°C时,2%的LBO@LMO保持了88.55%的容量,而LMO的容量为58.47%.
- 在100个循环后的55°C时,2%的LBO@LMO保持了77.38%的容量,而LMO的容量为58.37%.
结论:
- LiB3O5涂层有效地提高了LMO阴极的循环稳定性和热性能.
- 涂层诱导有益的表面变化,包括兴奋剂和减轻颗粒裂变和溶解.
- 这项工作突出了酸在增强LMO电池应用中的潜力.
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