通过长寿命硫电池的无粘合剂分离器中的金属绝缘体接口加速聚硫化物氧化还原动力学
Jin Luo1, Moon Young Yang2, Yuhe Mu1
1Department of Mechanical Engineering, The University of Texas at Dallas, Richardson, Texas 75080, United States.
ACS nano
|December 16, 2025
概括
在无粘合剂分离器上的新W2N-WO3金属绝缘体接口通过加速反应动力学和抑制穿效应以提高稳定性来提高硫 (Li-S) 电池性能.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 硫 (Li-S) 电池具有较高的理论能量密度,但由于多硫化物 (LiPS) 反应动力学缓慢以及穿效应,它们面临着挑战.
- 由于这些问题,Li-S电池的商业化受到循环寿命和速率能力不佳的阻碍.
研究的目的:
- 开发一种无粘合剂分离器,采用现场形成的W2N-WO3金属绝缘体接口,以提高Li-S电池的性能.
- 通过异质连接工程来解决Li-S电池中的缓慢反应动力学和穿效应.
主要方法:
- 在碳涂层玻璃纤维 (C/GF) 基板上制造W2N-WO3薄膜,采用受控的编解.
- 使用理论计算来研究电子结构和LiPS与W2N-WO3异构结构的相互作用.
- 使用开发的无粘合剂分离器对Li-S电池进行电化学测试,包括速率能力和循环稳定性评估.
主要成果:
- W2N-WO3异质连接产生内部电场,加速硫氧化还原反应并改善LiPS吸附.
- 理论计算证实了W2N-WO3异构结构增强的氧化还原动力学和LiPS吸收.
- 带有W2N-WO3/C/GF分离器的Li-S电池表现出极好的速度能力,循环稳定性和在曲下机械完整性.
结论:
- W2N-WO3金属绝缘体接口有效调节无粘合剂分离器中的LiPS吸附和催化.
- 异质连接工程为开发高性能Li-S电池提供了一个有前途的战略.
- 开发的无粘合剂分离器显示出在先进的储能系统中实际应用的潜力.
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