一步烧结涂层,用于用于离子电池的空气稳定的O3型分层氧化物阴极
Yibo Pan1, Xing Zhou1, Deda Peng1
1State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Hubei, Wuhan 430070, People's Republic of China.
ACS applied materials & interfaces
|April 22, 2025
概括
一种新的涂层方法提高了离子电池阴极材料的空气稳定性. 这提高了实际应用的性能和耐用性.
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:
- 层状氧化物是对离子电池 (SIB) 的有希望的阴极材料,因为其容量高,成本低.
- O3型分层氧化物,如Na,Ni1/3Fe1/3Mn1/3) O2 (NFM333) 的空气稳定性较差,妨碍了它们的实际使用.
- 大气水分和CO2的降解是SIB阴极材料面临的重大挑战.
研究的目的:
- 开发一种简单的方法来提高O3型层叠氧化物阴极材料的空气稳定性.
- 为了研究重金属氧化物涂层在保护NFM333免受空气降解方面的有效性.
- 为了评估涂层NFM333在暴露于空气后的电化学性能.
主要方法:
- 采用一阶段烧结涂层方法,在NFM333.3上应用统一的Sb2O3层.
- 涂层和未涂层的NFM333样本被暴露在空气中,湿度为60%的空气中,持续2天.
- 电化学性能,包括特定容量和容量保持,在暴露后进行了测试.
主要成果:
- 该Sb2O3涂层通过减轻H2O和CO2接触,有效地保护NFM333免受空气降解.
- 使用0.5%重量的Sb2O3涂层的NFM333在暴露后1C的200个周期后保持了84.6%的容量.
- 在相同的条件下,未涂层的NFM333显示出显著较低的容量保留率 (65.3%).
结论:
- 一个简单的Sb2O3涂层策略可以提高O3型NFM333用于离子电池的空气稳定性.
- 涂层材料在暴露于空气后表现出更好的电化学性能和耐用性.
- 这种方法为开发用于实际SIB应用的空气稳定阴极材料提供了宝贵的见解.
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