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Weak Acid Solutions04:02

Weak Acid Solutions

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Few compounds act as strong acids. A far greater number of compounds behave as weak acids and only partially react with water, leaving a large majority of dissolved molecules in their original form and generating a relatively small amount of hydronium ions. Weak acids are commonly encountered in nature, being the substances partly responsible for the tangy taste of citrus fruits, the stinging sensation of insect bites, and the unpleasant smells associated with body odor. A familiar example of a...
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In a galvanic cell, the electrical work is done by a redox system on its surroundings as electrons produced by the spontaneous redox reactions are transferred through an external circuit. Alternatively, an external circuit does work on a redox system by imposing a voltage sufficient to drive an otherwise nonspontaneous reaction in a process known as electrolysis. For instance, recharging a battery involves the use of an external power source to drive the spontaneous (discharge) cell reaction in...
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通过调节稳定的金属电池的阳离子分解反应来补贴固体电解质间相.

Jia-Lin Li1,2, Xue-Qiang Zhang1,2, Pei-Ping Yu3

  • 1School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, P.R. China.

Angewandte Chemie (International ed. in English)
|December 13, 2025
PubMed
概括

在金属电池中快速修补固体电解质间相 (SEI) 通过调节 bis ((fluorosulfonyl) imide 离子分解来减少非活性的形成. 这一策略提高了电池周期寿命和稳定性.

关键词:
阳离子分解反应的反应.不活跃的化合物金属电池 金属电池的使用方法囊细胞是一种囊细胞.固体电解质相间阶段

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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
  • 电池技术 电池技术

背景情况:

  • 金属阳极上的固体电解质介相 (SEI) 不稳定性会导致重复的破裂和补丁.
  • 这种SEI循环导致不活跃的形成和金属电池的快速故障.
  • 在SEI补丁中的非活性化合物是导致逆转能力差的主要原因.

研究的目的:

  • 通过调节 bis ((fluorosulfonyl) imide 离子 (FSI-) 分解,提出一种快速SEI补丁的新策略.
  • 为了减少电池循环过程中形成的非活性化合物的数量.
  • 为了提高金属电池的稳定性和循环寿命.

主要方法:

  • 通过增加阳极超电位来调节电解质中的FSI分解反应.
  • 在沉积的最后阶段应用高电流密度.
  • 描述SEI组合和评估电池性能.

主要成果:

  • 拟议的协议显著减少了不活跃的化合物62.2%.
  • 一个原型袋式电池实现了202个稳定的循环,能量密度为411 Wh kg-1.
  • 增加的阳极超电位促进了FSI的快速和完整的分解,产生了大量的不溶性无机成分,以有效地形成SEI.

结论:

  • 调节FSI分解为快速SEI补丁提供了一个有效的策略.
  • 开发的协议增强了SEI的稳定性,并减少了非活性的形成.
  • 这项工作为先进的金属电池的SEI形成和稳定提供了新的见解.