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一个提升的高实际容量的硫电池
Yue Zhang1,2, Amardeep Amardeep1,2, Zhenrui Wu1,2
1School of Engineering, Faculty of Applied Science, University of British Columbia, Kelowna, BC, V1V 1V7, Canada.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|April 3, 2024
概括
研究人员开发了高容量的水性可充电硫电池,通过将硫阴极化. 这一策略提高了硫的利用率和电池的性能,实现了超过5.6 mAh的cm−2面积容量,用于先进的能量存储.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性可充电的硫 (Zn-S) 电池提供了一个具有成本效益的,高容量的储能解决方案.
- 关键的挑战包括低硫阴极可逆性,低氧化还原动力学,低硫利用率和不足的面积容量.
研究的目的:
- 开发一个大面积容量的Zn-S电池,其容量超过5 mAh cm−2.2.
- 通过分子级调节硫和来提高 Zn-S 电池的性能.
主要方法:
- 在硫 (S) 阴极中加入 (Te) 作为剂.
- 使用碳封闭的TeS阴极 (Te1S7/C) 具有高质量负载 (4.22 mg cm−2).
- 使用混合电解质设计.
主要成果:
- 通过Te1S7/C阴极实现了5.64 mAh cm-2的显著面积容量.
- 在0.1 A g-1.1下提供1335.0 mAh g-1的高可逆容量.
- 证明了加速的氧化还原转换,增强的硫利用,以及由Te转化为 Telluride的额外的氧化还原贡献.
结论:
- 在阴极中S和Te的分子水平调节使高性能Zn-S电池成为可能.
- 开发的正极结构和混合电解质显著提高了容量,稳定性和寿命.
- 这种方法为高容量水性Zn-S电池提供了合理的设计,用于实际应用.
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