高性能近固态金属电池:使用固体液体双疗法通过溶解离子液体和NiO进行接口工程
Kuntal Ghosh1, Mononita Das1, Alok Kumar Chaudhary1,2
1Energy Materials and Devices Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata 700032, India.
ACS applied materials & interfaces
|December 2, 2025
概括
这项研究引入了固态金属电池的双疗法方法,提高了性能和稳定性. 该方法结合了固体和液体处理,以克服电池的界面挑战和状物生长.
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:
- 固态金属电池 (SSLMBs) 面临的挑战是接口不兼容性和树的生长.
- 现有的电解质往往由于导电性差和电化学稳定性有限而受到影响.
- 开发强大的接口对于安全高效的SSLMB至关重要.
研究的目的:
- 开发一种双疗法策略,以提高SSLMB的性能.
- 用结合的固体和液体处理来解决接口问题和树突形成.
- 改善固体电解质的离子导电性和电化学稳定性.
主要方法:
- 固体治疗:将NiO作为烧结辅助剂纳入Ga化LLZO (GN050) 中,以改善密度和导电性.
- 液体治疗:将溶解离子液体 (SIL) 输入受处理的LLZO (GN050-SIL).
- 电化学表征,包括离子导电性,接口电阻,涂层/剥离试验,以及全细胞性能评估.
主要成果:
- 添加NiO提高了LLZO粒边导率约7倍,并改善了密度.
- GN050-SIL实现了高离子导电率 (0.252 mS·cm-1),低界面电阻 (87.4 Ω) 和广泛的电位窗口 (>5.5 V).
- 稳定的涂/剥离>1000小时,临界电流密度为0.55 mA·cm-2和优越的全电池性能被证明.
结论:
- 双疗法方法有效地缓解了SSLMBs的接口问题和树生长.
- 这种方法为可扩展和稳定的固态金属电池提供了有希望的途径.
- 工程电解质表现出卓越的电化学性能和长期循环稳定性.
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