超稳定的离子电池由全固态铁电工程复合电解质实现.
Yumei Wang1,2, Zhongting Wang3, Xiaoyu Xu4,5
1College of Aerospace Engineering, Chongqing University, Chongqing, 400044, People's Republic of China. yumei_emma@qq.com.
Nano-micro letters
|July 25, 2024
概括
研究人员使用一种新的固态电解质开发出了一种稳定的离子电池. 这项创新克服了传统电池中的副作用,提高了静态储能应用的长期性能.
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:
- 有NASICON结构电极的对称离子电池为静止能量存储提供了制造和成本优势.
- 由于Na3V2(PO4) 3 (NVP) 阳极和液体电解质之间的副作用导致长期循环性能差,阻碍了它们的实际应用.
研究的目的:
- 为了解决电解质副作用引起的对称NVP//NVP细胞的容量衰减.
- 为了提高阳极/电解质接口的稳定性和提高离子电池的循环性能.
主要方法:
- 使用全固态复合电解质来取代传统的液体电解质.
- 应用于复合电解质的铁电工程,以改善界面离子导电性和减少界面电阻.
- 用工程电解质测试了对称的NVP//NVP细胞和NVP//NFFCN (普鲁士蓝色阴极) 细胞.
主要成果:
- 带有铁电工程复合电解质的NVP//NVP电池在650个循环后保持了86.4%的容量.
- 全固态NVP//NFFCN细胞表现出异常的循环稳定性,超过9000个循环,每个循环的低色率为0.005%,在500 mA g-1.
- 设计的电解质有效抑制了副作用,并改善了接口稳定性.
结论:
- 一种全固态复合电解质,通过铁电工程增强,显著提高了离子电池的循环稳定性.
- 这种方法解决了对称NVP//NVP电池的接口问题,并使高性能NVP//NFFCN电池适合大规模静态能量存储.
- 开发的电解质对下一代离子电池技术有很大的前景.
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