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Batteries and Fuel Cells03:12

Batteries and Fuel Cells

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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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P-N junction01:11

P-N junction

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A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
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Updated: Jun 12, 2025

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
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高性能无阳极全固态电池,通过多站点核和弹性网络实现.

Jihoon Oh1,2, Yeeun Sohn1,2, Jang Wook Choi1,2

  • 1School of Chemical and Biological Engineering and Institute of Chemical Process, Seoul National University 1 Gwanak-ro Gwanak-gu Seoul 08826 Republic of Korea jangwookchoi@snu.ac.kr.

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|April 21, 2025
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概括

这项研究引入了一种新的多种子策略,用于无阳极全固态电池 (ALASSB). 这种方法提高了沉积的均性和机械稳定性,提高了电池在室温下的性能.

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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:

  • 没有阳极的全固态电池 (ALASSB) 提供了高能量密度和安全的绿色交通.
  • 不同质的沉积和机械降解阻碍了ALASSB的性能,特别是在环境温度下.

研究的目的:

  • 开发ALASSB的保护层策略,使沉积均,并减轻机械应力.
  • 为了提高ALASSB在室温下循环稳定性和性能.

主要方法:

  • 开发了一种新的多种子策略,将性金属种子与聚合物矩阵集成在一起.
  • 用多种具有不同化潜力的种子来促进各种化途径.
  • 使用弹性聚合物网络来消除保护层内的应力.

主要成果:

  • 由于多种子核化场所,实现了统一的沉积.
  • 弹性聚合物矩阵有效地减轻了循环过程中的机械降解.
  • 在0.5°C和25°C的100个循环后,ALASSB全电池保持了70%的容量.

结论:

  • 多种性种子和弹性粘合剂的协同效应为ALASSB保护层提供了可行的设计原则.
  • 该战略增强了ALASSB用于储能应用的实际实施.
  • 开发的方法提供了一条改善电池寿命和绿色移动性能的途径.