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A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
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阴极工程为高性能全硫化基Li-SeS2固态电池提供了强大的接口接触

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二硫化物 (SeS2) 通过提高导电性来增强全固态硫电池. 对于下一代储能,SeS2复合阴极具有很高的容量和稳定性.

关键词:
完全固态电池综合战略接口接触硫化硫化物固体电解质

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科学领域:

  • 材料科学
  • 电化学
  • 能量储存

背景情况:

  • 完全固态的硫电池提供高能量密度和更好的安全性,而不是基于液体的系统.
  • 硫的绝缘性和低反应性限制了这些电池的阴极性能.
  • 解决缓慢的动力学和低利用率对于推进电池技术至关重要.

研究的目的:

  • 研究二硫化物 (SeS2) 作为全固态硫电池的阴极活性物质.
  • 与纯硫相比,提高电子导电性和电化学性能.
  • 评估SeS2复合材料在高能量密度应用中的潜力.

主要方法:

  • 使用各种策略制造SeS2复合电极,包括用Li6PS5Cl和Ketjen Black (SeS2-BM@KB) 进行球磨.
  • 电池电化学特性,包括循环性能和容量保留.
  • 对高负载电池进行面积容量的评估.

主要成果:

  • 球磨SeS2/Li6PS5Cl/Ketjen Black复合阴极表现出极好的电化学性能.
  • 在1A g-1的300个循环后,细胞的可逆容量达到673. 5mAh g-1,保持80%.
  • 高负载电池的面积容量高达14.43 mAh cm-2.

结论:

  • 二硫化物 (SeS2) 是完全固态硫电池的一个有前途的阴极材料.
  • 在SeS2复合材料的三相接口上增强的相互作用提高了性能.
  • 开发的SeS2阴极显示出新一代高能量密度储能系统的潜力.