/双柱LiNiO2作为一个Co-免费的三极阴极材料,确保在4.6V稳定循环
Jinwei Zhou1, Yuhang Chu2, Wenxin Liu2
1School of Metallurgy and Environment, Engineering Research Center of the Ministry of Education for Advanced Battery Materials, Hunan Provincial Key Laboratory of Nonferrous Value-added Metallurgy, Central South University, Changsha 410083, P. R. China.
ACS applied materials & interfaces
|March 5, 2024
概括
离子电池的无正极材料使用Mg/Al双柱结构得到了改进. 这种NMA材料增强了稳定性和电化学性能,提供了具有成本效益的高能耗解决方案.
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:
- 无,富含的阴极为离子电池提供了成本和能源优势.
- 商业化受限于阴离子乱,相位不稳定,高压性能差.
- 开发稳定,高性能的无C0阴极对于下一代能源存储至关重要.
研究的目的:
- 为了合成和表征一种新的无三元阴极材料,Mg/Al双柱LiNiO2 (NMA).
- 研究Mg/Al兴奋剂在增强阴极稳定性和性能方面的结构和电化学益处.
- 为具有成本效益,高能量密度的离子电池阴极提供可行的解决方案.
主要方法:
- 通过湿涂和化-化技术合成NMA.
- 结构分析以确认Mg/Al双柱形成和离子分布.
- 电化学测试,包括循环电压测量,速率能力和长期高压循环性能.
主要成果:
- /双支柱结构有效地抑制了阴离子乱 (Li+/Ni2+) 和不可逆转的相位过渡.
- NMA表现出增强的结构完整性,减少循环过程中的裂和电解质侵蚀.
- 特殊的电化学性能:在1°C的500个周期后保持70%的容量,高速率能力 (162mAhg-1在5°C).
结论:
- /双支柱结构显著提高了无阴极的结构稳定性和电化学性能.
- NMA表现出强大的高压性能和出色的循环稳定性,解决了当前无C0材料的关键局限性.
- 这项工作为开发高能离子电池的先进,可持续的阴极材料提供了有前途的途径.
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