固态金属电池的复合固体电解质,具有改进的电化学性能
Xiaobao Zhang1, Huan Zhao1, Ning Wang1
1National Engineering Research Center for Rare Earth, Grirem Advanced Materials Co., Ltd., Beijing 100088, China; Rare Earth Functional Materials (Xiong'an) Innovation Center Co., Ltd., Xiong'an 071700, China; General Research Institute for Nonferrous Metals, Beijing 100088, China.
Journal of colloid and interface science
|December 28, 2023
概括
渐变复合体固体电解质 (GCSEs) 提高金属电池的安全性和性能. 这种新的结构增强了离子导电性,并抑制了用于稳定,高能电池的树石的生长.
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:
- 复合固体电解质 (CSEs) 是更安全,高能金属电池的关键.
- 挑战包括低离子导电性和树形成.
研究的目的:
- 开发具有梯度结构的新型CSEs,以增强离子导电性和抑制树突.
- 为了提高电极兼容性和电池的整体性能.
主要方法:
- 制造具有Li6.4La3Zr1.4Ta0.6O12 (LLZTO) 陶和聚合物的梯度分布的CSE.
- 离子导电性和电化学稳定性的表征.
- 测试LiFePO4 (LFP) 的电池.
主要成果:
- 梯度复合固体电解质 (GCSE) 在室温下达到1.5 × 10-4 S cm-1的离子导电率.
- 观察到稳定的循环超过1200小时.
- 电池表现出色,在60°C的200个循环后保持了90%的容量.
结论:
- 梯度结构固体电解质在离子运输和树突抑制方面具有显著的优势.
- 这些发现预计将加速金属电池的实际应用.
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