富含,无的P2层氧化物阴极用于离子电池
Zulkifli1, Balaji Sambandam1, Ahmad Nurul Fahri1
1Department of Materials Science and Engineering, Chonnam National University, Gwangju, 61186, Republic of Korea.
Small (Weinheim an der Bergstrasse, Germany)
|November 6, 2024
概括
这项研究引入了一种用于离子电池的新型,可持续的阴极材料,该材料使用在基于的分层氧化物中使用多元元素兴奋剂 (,,). 新材料具有很高的容量和稳定性,在循环过程中避免相位过渡.
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:
- 离子电池的P2层阴极材料由于相位反应和结构不稳定而遭受容量损失.
- 现有的兴奋剂策略往往涉及昂贵的元素,并且未能解决可持续性问题.
- 开发一种最佳,经济有效和稳定的基于Mn的分层氧化物阴极仍然是一个挑战.
研究的目的:
- 开发一种可持续的,无Co-Ni,多元元素合的基于Mn的P2层阴极,用于离子储存.
- 为了增强结构稳定性和抑制循环过程中不良的相位过渡.
- 为了实现高可逆容量和长期循环性能.
主要方法:
- 合成高含量的多元元素合的基于Mn的P2层氧化物 (NLMMC87和NLMMMC77).
- 在现场进行X射线衍射分析,以研究循环过程中的相位过渡.
- 电化学性能测试,包括容量,库伦比效率和速率能力.
主要成果:
- 开发的材料 (NLMMC87和NLMMMC77) 在循环过程中没有P2-O2相位过渡.
- 同时替代Cu和稳定剂 (Li,Mg) 抑制了氧的演变.
- NLMMC87在0.1°C的温度下实现了167.9mAhg-1的可逆容量,97%的库伦比效率和出色的速率稳定性.
结论:
- 拟议的多元元素兴奋剂策略和高含量有效地提高了基于Mn的P2层阴极的稳定性和性能.
- 这种方法为开发先进的离子电池阴极提供了可持续和有前途的途径.
- 为了实际实施,对全细胞应用的进一步研究至关重要.
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