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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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没有添加电解质的纳米阳极,用于硫化物为基础的全固态离子电池.

Xiao Xu1, Qing Sun1,2, Yuanyuan Li1

  • 1State Key Laboratory of Advanced Welding and Joining, School of Materials Science and Engineering, Harbin Institute of Technology (Shenzhen), Shenzhen, 518055, China.

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概括

研究人员开发了一种用LiAlO2涂层的新阳极,用于全固态离子电池 (ASSLB). 这项创新提高了电池的性能和寿命,为更安全,高能量密度的储能解决方案铺平了道路.

关键词:
所有固态电池都是固态电池.离子导电涂层层的离子导电涂层阳极是一种阳极.硫化物电解质 硫化物电解质

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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:

  • 全固态离子电池 (ASSLB) 对于高能量密度和安全至关重要.
  • 阳极提供高容量,但受到体积扩张问题的困扰.
  • 对于大规模的ASSLB应用,板式阳极是首选的.

研究的目的:

  • 为ASSLBs开发一种稳定且高性能的板式阳极.
  • 研究LiAlO2涂层对阳极性能的影响.
  • 展示一种可扩展的方法来准备先进的ASSLB电极.

主要方法:

  • 用LiAlO2层涂覆 (Si),以创建Si@LiAlO2电极.
  • 使用没有硫化物电解质的传统泥涂层技术.
  • 对Si@LiAlO2电极和全电池的电化学性能测试.

主要成果:

  • Si@LiAlO2 电极表现出由于保护层和离子导电层 LiAlO2 的增强电化学性能.
  • 在150个循环中实现了高库伦比效率 (>80%) 和特定容量 (1205 mAh g-1).
  • 全电池显示可逆容量为147 mAh g-1 ,在62个循环后保持80.2%的容量.

结论:

  • AlO2涂层有效地减轻了的体积膨胀,并改善了+扩散.
  • Si@LiAlO2电极为ASSLB制造提供了一种实用且可扩展的方法.
  • 这项工作为开发持久,高绩效的ASSLB提供了一个有前途的途径.