一个由LiAlO2和固体电解质和导电碳单独修改的双层分离器,用于高性能硫电池
Jie Song1, Shuang Xia1, Nan Wang1
1State Key Laboratory of Materials-oriented Chemical Engineering, School of Energy Science and Engineering, Nanjing Tech University, Nanjing, Jiangsu, 211816, China.
Advanced materials (Deerfield Beach, Fla.)
|February 19, 2025
概括
一种新型的双层分离器 (SPLAOMS) 有效地抑制了硫 (Li-S) 电池中的穿效应和树突. 这一进步使得在苛刻的条件下能够生产稳定的高性能Li-S电池.
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:
- 硫 (Li-S) 电池面临着诸如聚硫化物穿效应和树生长等挑战,阻碍了实际应用.
- 在高电流密度和硫载荷的高性能对于Li-S电池的商业化至关重要.
研究的目的:
- 开发一个修改后的分离器,减轻Li-S电池的关键问题.
- 在苛刻的操作条件下提高Li-S电池的电化学性能和稳定性.
主要方法:
- 用纳米LiAlO2 (LAO) 固体电解质和超P导电碳修改商业分离器,以创建双层分离器 (SPLAOMS).
- 使用SPLAOMS在高硫载荷和高电流密度下对Li-S电池进行电化学测试.
主要成果:
- 该SPLAOMS分离器有效地抑制了聚硫化物迁移,并促进了均的沉积.
- 带有SPLAOMS的Li-S电池表现出极好的循环稳定性,在5°C的500个循环后保持733mAhg-1,容量减弱最小 (0.03%每循环).
- 在超高硫负载下 (8.2 mg cm-2) 保持了800 mAh g-1的容量.
结论:
- 开发的SPLAOMS分离器显著提高了Li-S电池的性能和稳定性.
- 这种方法为高性能Li-S电池的商业化提供了可行的途径.
- 这项研究为推进Li-S电池技术提供了关键的参考.
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