在丰富的阴极上表面涂层 离子电池离子电池的材料
Yun Seong Byeon1, Hyo Bin Lee1, Yoojin Hong1
1Department of Advanced Materials Engineering for Information and Electronics, Integrated Education Institute for Frontier Science & Technology (BK21 Four), Kyung Hee University, 1732 Deogyeong-daero, Giheung-gu, Yongin 17104, Republic of Korea.
ACS applied materials & interfaces
|February 4, 2025
概括
用黄铜涂覆富含的阴极材料可以提高离子电池循环性能. 这种表面工程增强了稳定性,并减少了对更好的能量密度的阻力.
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:
- 提高离子电池 (LIB) 的能量密度需要高容量的正极材料.
- 富含的分层阴极材料提供了商业可行性,但需要表面工程来提高循环性能.
- 表面修改对于稳定富含Ni的阴极和降低界面电阻至关重要.
研究的目的:
- 为了研究非固态度的六角青铜 (LiWO3) 作为丰富的正极材料的表面涂层的有效性.
- 通过表面修改,提高丰富的阴极的循环性能和结构稳定性.
- 探索LiWO3的物理化学特性对LIBs界面反应的影响.
主要方法:
- 使用简单的湿涂法,将LiWO3涂在富含Ni的阴极材料上.
- 描述了LiWO3的物理化学特性,包括离子导电性和机械强度.
- 涂层阴极材料的电化学性能,界面电阻和结构稳定性在充电-放电周期期间进行了评估.
主要成果:
- WO3涂层表现出高离子导电性 (约. 10^-6 S cm^-1) 和机械强度 (大约. 236.0 MPa) 的情况.
- LiWO3表面层显著降低了界面阻力,并在离子循环过程中促进了应变放松.
- 涂层丰富的阴极材料表现出增强的循环性能,而没有大幅损失可逆容量.
结论:
- 非固态立体LiWO3是一种有效的表面涂层,用于提高LIBs中的Ni丰富的阴极材料的循环性能.
- LiWO3的独特特性调节界面反应,改善结构完整性和降低阻力.
- 这种方法为开发使用先进的阴极材料的可靠高能LIB提供了一条途径.
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