在Li-S电池中抑制聚硫化物穿,使用AlPC12复合材料提高稳定性和性能
Ka Chun Li1, Yaoqi Wei1, Xuanming Chen1
1Department of Chemical and Biological Engineering, The Hong Kong University of Science and Technology, Kowloon 999077, Hong Kong, China.
ACS applied materials & interfaces
|May 21, 2025
概括
一种新的酸复合物 (AlPC12) 有效地抑制了硫电池中的多硫化物穿. 这种正极材料提高了电池的稳定性和寿命,推进了高能量密度存储解决方案.
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) 电池在理论上具有很高的能量密度,但受到聚硫化物穿效应的影响,限制了其实际应用.
- 开发稳定的阴极材料对于克服Li-S电池的性能限制至关重要.
研究的目的:
- 引入酸复合材料 (AlPC12) 作为Li-S电池的新型阴极材料.
- 为了解决和减轻聚硫化物穿效应.
- 为了提高电化学性能和Li-S电池的循环寿命.
主要方法:
- 通过水解凝结和低温化合成AlPC12.
- 使用吸附试验和电化学测量进行表征.
- 密度函数理论 (DFT) 计算以了解LiPS相互作用.
主要成果:
- AlPC12有效地固定了多硫化物 (LiPS),减少了穿效应.
- 与传统的阴极相比,AlPC12/S电池具有更高的放电能力和稳定性.
- 观察到极好的循环稳定性,即使在高硫负载和高C率下,衰变率也很低 (例如,在0.5C时837 mAh/g,在3C时529 mAh/g).
结论:
- AlPC12是高性能Li-S电池的一个有前途的阴极材料.
- 材料的3D结构和强大的LiPS相互作用是其有效性的关键.
- 可扩展和环保的合成过程支持可持续的电池技术开发.
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