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对于在超宽温度范围内工作的硫电池,加快硫转化反应的速率决定步骤

Ding-Rong Deng¹, Hai-Ji Xiong¹, Yu-Lin Luo¹

¹College of Marine Equipment and Mechanical Engineering, Key Laboratory of Energy Cleaning Utilization, Development, Cleaning Combustion and Energy Utilization Research Center of Fujian Province, Xiamen Key Laboratory of Marine Corrosion and Smart Protective Materials, Jimei University, Xiamen, Fujian, 361021, China.

Advanced materials (Deerfield Beach, Fla.)

|June 13, 2024

概括

研究人员为硫电池开发了多孔木瓦纳酸盐球体,通过抑制聚硫化物穿和改善低温动力学,提高了在广泛温度下的性能.

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
储能储能储能储能储能储能

背景情况:

对于恶劣环境中的储能系统来说,广泛的操作温度至关重要.
硫电池面临的挑战是高温时的聚硫化物穿和低温时的慢动力学.
硫反应机制在室温和冷温度之间存在显著差异.

研究的目的:

在冷温度下研究硫反应机制.
开发用于硫电池的宿主材料,在广泛的温度范围内有效运行.
为了减轻穿效应并改善低温反应动力学.

主要方法:

在现场拉曼光谱学.
电化学阻抗光谱学电化学阻抗光谱学
设计和合成多孔木瓦纳酸盐 (BiVO4) 球体作为硫宿主材料.

主要成果:

在冷温度下确定了一个新的速度决定的步骤,涉及Li2S8到Li2S4的减少.
多孔的BiVO4球体促进了快速的离子运输,并催化了关键的速度决定的步骤.
证明在高温下抑制了穿效应,在低温下提高了效率.

结论:

多孔BiVO4球有效地提高硫电池在广泛的温度条件下的性能.
材料设计解决了高温穿效应和低温运动限制.
开发的硫电池在不同温度下显示出优异的速度能力和周期稳定性.

关键词:

维斯穆特瓦纳达特 (VANADATE) 是一种 -硫电池的使用情况.速度-确定步骤.反应机制的反应机制.温度范围广泛的温度范围.

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