一种基于双离子化学的超离子玻璃,使全固态离子电池能够长周期运行
Xiaoting Lin1, Yang Zhao1, Changhong Wang1,2
1Department of Mechanical and Materials Engineering, University of Western Ontario, 1151 Richmond St, London, Ontario, N6A 3K7, Canada.
Angewandte Chemie (International ed. in English)
|November 27, 2023
概括
研究人员开发了一种新的超离子玻璃电解质 (NTOC),用于固态离子电池. 这种材料具有超高的离子导电性和出色的稳定性,为更安全的高能电池铺平了道路.
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
- 固态化学 固态化学
背景情况:
- 玻璃离子固态电解质 (GNSSEs) 对于开发更安全,高能全固态离子电池 (ASSNIB) 至关重要.
- 目前的GNSSEs在室温下具有不足的离子导电性,阻碍了ASSNIB的性能.
- 开发具有增强导电性和稳定性的新型GNSSEs对于推进电池技术至关重要.
研究的目的:
- 发现和描述一种新的玻璃状Na-ion固态电解质,具有优越的离子导电性和电化学稳定性.
- 研究新电解质的结构性质及其与离子运输的相关性.
- 为了评估全固态离子电池中新电解质的性能.
主要方法:
- 合成一种新的超离子玻璃电解质,0.5Na2O2-TaCl5 (NTOC),使用氧化的双离子子子网.
- 描述NTOC电解质的局部结构,离子导电能力和电化学稳定性.
- 使用NTOC电解质评估循环稳定性和性能的ASSNIB的制造和测试.
主要成果:
- 该NTOC电解质在25°C时具有4.62mS/cm的超高离子导电性,比之前报告的GNSSEs高出20倍以上.
- 具有丰富的桥梁和非桥梁氧原子的独特局部结构促进了无序的离子分布和低迁移障碍.
- 使用NTOC的ASSNIB在室温下超过500个周期表现出卓越的循环稳定性,这是由于其优异的电解质可塑性和电化学氧化稳定性.
结论:
- 发现NTOC玻璃电解质代表了固态离子电池技术的重大进步.
- 双离子化学方法为设计高性能超离子玻璃电解质开辟了新的途径.
- 预计这一突破将刺激对下一代储能解决方案的多离子玻璃电解质的进一步研究.
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