一种丰富的化,化和化固体电解质,用于4.8V级全固态电池
Yini Zhang1, Zhenyou Song1, Likuo Wang1
1Institute of New Energy for Vehicles, School of Materials Science and Engineering, Tongji University, Shanghai, 201804, China.
Small (Weinheim an der Bergstrasse, Germany)
|November 5, 2024
概括
研究人员开发了一种富含的化化固体电解质 (SE),可使离子导电率翻倍,并提高全固态电池 (ASSB) 的稳定性. 这一突破解决了当前电池技术的关键局限性.
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
- 固态化学 固态化学
背景情况:
- 固态电解质 (SE) 对于全固态电池 (ASSB) 来说至关重要.
- 二化 (Li2ZrCl6) 由于Zr丰富而具有前景,但其离子导电性较低,高压稳定性较差.
- 现有的方法无法同时提高离子导电性和结构完整性.
研究的目的:
- 为ASSBs开发一种新的化物固体电解质,具有增强的离子导电性和高压稳定性.
- 克服离子流动性和现有材料的结构稳定性之间的权衡.
- 创建一种适用于高性能ASSB的实际应用的材料.
主要方法:
- 采用了一种涉及部分化和多余离子结合的双重策略.
- 一种富含的化化物SE (Li2.3ZrCl6.1F0.2) 的合成.
- 使用Li2.3ZrCl6.1F0.2,LiCoO2阴极和Li-In阳极制造和测试一个完全固态电池.
主要成果:
- 与原始的Li2ZrCl6.6.2相比,新型富化化SE (Li2.3ZrCl6.1F0.2) 的离子导电率翻了一番.
- 显著改善了高压稳定性.
- 全固态电池提供了高的初始特异容量 (198.0mAhg-1在0.1°C) 和优异的容量保留 (78.5%在150次循环后) 在3.0-4.8V的范围内.
结论:
- 开发的丰富化化SE为提高ASSB性能提供了可行的解决方案.
- 这种材料克服了以前的化物SE的关键限制,使得能量密度更高,周期寿命更长.
- 这些发现为先进,更安全,更高效的全固态电池铺平了道路.
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