一个有活力的S0/S+ 氧化还原化学用于水性和非水性硫电池
Jinye Li1, Xueke Lin1, Chengjun Lei1
1State Key Laboratory of Chem/Bio-Sensing and Chemometrics, Joint International Research Laboratory of Energy Electrochemistry, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082, China.
Angewandte Chemie (International ed. in English)
|December 31, 2025
概括
研究人员使用S2Br2开发了一种新的基于硫的电池化学 (S0/S+). 这种新的方法克服了传统硫电池的局限性,使得水和非水系统的能量密度更高,性能更好.
科学领域:
- 电化学和材料科学 材料科学
- 先进的电池技术 电池技术
背景情况:
- 目前的硫基电池 (S0/S2-) 面临着缓慢的动力学和低能量密度等挑战.
- 水态系统由于缓慢的固体-固体转换而遭受高过量的潜力.
- 非水性系统表现出由可溶性聚硫化物中间体产生的穿效应和容量损失.
研究的目的:
- 引入一种新的S0/S+氧化还原对,以提高电池性能.
- 探索液相S2Br2在水性和非水性电解质中的潜力.
主要方法:
- 在量身定制的水性和有机电解质中研究了S0/S+氧化还原化学.
- 配对新的化学与 (Zn) 和 (Li) 阳极.
- 电化学性能特征,包括氧化还原潜力和能量密度.
主要成果:
- 与S0/S+相比,S0/S+的氧化还原对表现出明显更高的平衡潜力 (1.68V与Zn2+/Zn相比;3.4V与Li+/Li相比) 与S0/S2-.
- 直接的一步转换途径避免了多硫化物中间体,从而完全利用硫 (837 mAh g-1).
- 使用 Zn 阳极达到 1406 Wh kg-1 (S 基) 和使用 Li 阳极达到 2689 Wh kg-1 (S 基) 的高能量密度.
结论:
- 由S2Br2启用的S0/S+氧化还原化学为传统的硫电池系统提供了一个有希望的替代方案.
- 这种新的化学反应证明了内在更快的动力学和直接的转化途径,克服了关键的限制.
- 实现的高能量密度凸显了开发高性能电池的巨大潜力.
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