一种具有成本效益,离子导电性和可压缩的氧化固态电解质,用于稳定的全固态基电池
Lv Hu1, Jinzhu Wang1, Kai Wang1
1Hefei National Research Center for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, Anhui, China.
Nature communications
|June 27, 2023
概括
一种新的Li-Zr-O-Cl固态电解质为所有固态电池提供了高离子导电性和可压缩性. 这种具有成本效益的材料可以使电池在2000个周期内保持稳定的性能.
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
- 固态化学 固态化学
背景情况:
- 全固态电池 (ASSB) 需要有机固态电解质,具有高离子导电性 (>1 mS cm-1 在25°C),优异的压缩性 (>90%密度在250-350 MPa以下),和成本效益 (<$50/kg).
- 当前的固态电解质在满足这些综合要求方面经常面临挑战,这阻碍了ASSBs的商业化.
研究的目的:
- 开发一种新的无机固态电解质,满足ASSB的关键性能和成本目标.
- 为了证明这个新的电解质在一个功能齐全的固态电池电池中的潜力.
主要方法:
- 1·75ZrCl4·75O0·5氧化固态电解质的合成和表征.
- 测量离子导电性,可压缩性和原材料成本.
- 使用开发的电解质,LiNi0·8Mn0·1Co0·1O2阴极和Li6PS5Cl涂层Li-In阳极,制造和测试实验室规模的ASSB.
主要成果:
- 合成的Li1·75ZrCl4·75O0·5电解质在25°C时具有2.42 mS cm−1的离子导电性.
- 它在300MPa以下达到94.2%的密度,显示出高压缩性.
- 估计的原材料成本为11.60美元/公斤,远低于目标.
- 在1.5堆叠压力下,ASSB电池在1Ag-1和25°C下2082个循环后显示出70.34% (70.2mAhg-1) 的放电容量保留.
结论:
- 开发的Li-Zr-O-Cl氧化固态电解质成功满足了离子导电性,可压缩性和成本效益的关键性能指标.
- 概念验证的ASSB电池显示出有希望的长期循环稳定性,验证了这种材料在下一代能源存储方面的潜力.
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