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相关概念视频

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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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Controlled current coulometry, also known as amperostatic coulometry, is a technique used in electrochemical analysis to measure the quantity of a substance through the controlled passage of current. It involves the application of a constant current to an electrochemical cell containing the analyte of interest. As the current flows through the cell, the analyte undergoes a redox reaction at the electrode surface, resulting in a charge transfer. By monitoring the time required for a certain...
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阴极化学力学控制低堆压力下的金属固态电池性能.

Saeed Moradi1,2,3, Beniamin Zahiri4,5, Paul V Braun6,7,8,9,10

  • 1Department of Materials Science and Engineering, University of Illinois Urbana-Champaign, Urbana, IL, USA.

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概括

控制阴极应力是实用的固态电池 (SSB) 的关键. 这项研究表明,阴极化学力学显著影响金属和剥离,使SSB在低压下具有较长周期寿命.

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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:

  • 固态电池 (SSB) 由于电极材料化学力学而面临接口故障.
  • 阳极应力一直是焦点,但阴极应力也严重影响SSB性能.
  • 实现实用的金属SSB需要理解和减轻这些压力.

研究的目的:

  • 为了研究正电极 (阴极) 化学力学应力在金属固态电池中的作用.
  • 为了证明阴极格子应变异性对电池性能的影响.
  • 为在低堆压力下运行的长周期SSB制定战略.

主要方法:

  • 使用模拟纹理正电极来研究化学力学应力.
  • 在受控的低堆压力 (<1 MPa) 下执行电化学循环.
  • 分析了阴极网格应变异性和金属/剥离行为之间的关系.

主要成果:

  • 阳性电极化学力学应力显著影响金属和剥离在低堆压力.
  • 在正电极化学力学中,阴极格子应变异性起着至关重要的作用.
  • 在1MPa堆压力和室温下,具有实际面积容量 (5mAh/cm2) 的经过长周期寿命的SSB.

结论:

  • 阴极化学力学对于金属固态电池的性能和稳定性至关重要.
  • 控制正极电应变对于减轻接口故障至关重要.
  • 这项研究为开发实用的低压固态电池铺平了道路.