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相关概念视频

Phase Transitions: Melting and Freezing02:39

Phase Transitions: Melting and Freezing

12.2K
Heating a crystalline solid increases the average energy of its atoms, molecules, or ions, and the solid gets hotter. At some point, the added energy becomes large enough to partially overcome the forces holding the molecules or ions of the solid in their fixed positions, and the solid begins the process of transitioning to the liquid state or melting. At this point, the temperature of the solid stops rising, despite the continual input of heat, and it remains constant until all of the solid is...
12.2K

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相关实验视频

Updated: May 28, 2025

Ultrasound Velocity Measurement in a Liquid Metal Electrode
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用于实用的液体金属电极的自加速可控制相变.

Chichu Qin1, Li Huang1, Xuan Zhong1

  • 1Department State Key Laboratory of Chem/Bio-Sensing and Chemometrics, College of Chemistry and Chemical Engineering, Advanced Catalytic Engineering Research Center of the Ministry of Education, Hunan University, Changsha, 410082, P. R. China.

Angewandte Chemie (International ed. in English)
|February 11, 2025
PubMed
概括

这项研究介绍了电池中- (NaK) 合金阳极的新策略. 它可以实现近固体处理和液体操作,防止树突形成和泄漏,提高安全性和性能.

关键词:
没有树突的阳极是没有树突的.在现场进行相位转换.液体金属是一种液体金属.机械化学 机械化学

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相关实验视频

Last Updated: May 28, 2025

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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:

  • 固体性金属阳极有风险形成树突,导致安全危险和性能下降.
  • 液态- (NaK) 合金阳极避免树突,但由于其流动性,会造成泄漏和短路风险.

研究的目的:

  • 开发一个可控制的NaK阳极相变化策略.
  • 为了克服矿形成和金属电池泄漏的挑战.
  • 为了使储能器件中的液体金属阳极能够安全有效地运行.

主要方法:

  • 使用液体金属 (LM) 辅助机械化学制造近固体阳极.
  • 通过电池内部的LM介导的现场替换反应诱导自我加速的相变.
  • 在圆柱状电池配置中集成和测试NaK合金阳极.

主要成果:

  • 成功处理了接近固体的NaK阳极,防止电池集成期间的泄漏.
  • 通过在现场将其转化为液态,实现了无树的操作.
  • 在一个带有NaK合金阳极的圆柱形电池中表现出极好的电化学性能.

结论:

  • 拟议的相位转换战略有效地解决了与液态金属阳极相关的安全和泄漏问题.
  • 这一创新推动了液体金属电极在下一代电池中的实际应用.
  • 开发的近固体到液体处理方法提高了储能系统的安全性和寿命.