一个积极的战略,以减少的残留高性能分层氧化物阴极材料的离子电池的
Lihua Feng1,2, Jinze Guo1,2, Chujun Sun3
1School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, China.
Small (Weinheim an der Bergstrasse, Germany)
|July 3, 2024
概括
在合成过程中减缓冷却速度,可显著降低基于的分层过渡金属氧化物阴极材料中的剩余. 这一战略增强了材料的统一性和结构稳定性,改善了实际应用的容量保留.
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
- 固态化学 固态化学
背景情况:
- 剩余对基于的分层过渡金属氧化物阴极材料的商业化构成了重大挑战.
- 这种杂质可以在材料的生产过程中形成,对性能产生负面影响.
研究的目的:
- 提出和研究一种积极的战略,以减少O3型Na0.9Ni0.25Mn0.4Fe0.2Mg0.1Ti0.05O2阴极材料中的剩余.
- 为了证明在单步制备方法中缓慢冷却速度的有效性.
主要方法:
- 对于O3类型的Na0.9Ni0.25Mn0.4Fe0.2Mg0.1Ti0.05O2.2,使用了一步合成方法.
- 在化阶段的冷却速度有系统地变化,重点是缓慢冷却策略.
- 在自然冷却和缓慢冷却的样品上进行了材料特性和电化学性能测试.
主要成果:
- 缓慢冷却显著提高了阴极材料的内部均性.
- 这种改进的均性促进了冷却过程中Na+的重新融合,大大减少了剩余的.
- 缓慢冷却策略抑制了泥凝和气体演变,从而提高了结构稳定性.
- 在1°C的300个循环后,容量保留从自然冷却材料的76.2%提高到慢冷却材料的85.7%.
结论:
- 减缓冷却速率是一种多功能且有效的策略,可以最大限度地减少基于的分层过渡金属氧化物阴极材料中的剩余.
- 这种方法提高了材料性能和电化学性能,为实际应用铺平了道路.
- 这些发现为开发用于离子电池的先进阴极材料提供了有价值的方法.
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