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相关概念视频

Batteries and Fuel Cells03:12

Batteries and Fuel Cells

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...
MOS Capacitor01:25

MOS Capacitor

A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...

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相关实验视频

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Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway
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高容量电池阴极材料LiFeBO3的结构调制

Yuri Janssen1, Derek S Middlemiss, Shou-Hang Bo

  • 1Department of Chemistry, SUNY Stony Brook, Stony Brook, New York 11794, United States.

Journal of the American Chemical Society
|June 20, 2012
PubMed
概括

这项研究重新确定了离子电池阴极材料LiFeBO3的晶体结构. 发现了一种新的调制结构,提高了稳定性并揭示了离子导电路径.

科学领域:

  • 材料科学 材料科学 材料科学
  • 固态化学 固态化学
  • 晶体学 晶体学是指结晶学.

背景情况:

  • 铁酸 (LiFeBO(3)) 是离子电池的一个有前途的阴极材料.
  • 精确的晶体结构确定对于理解材料特性和性能至关重要.

研究的目的:

  • 用单晶X射线衍射重新确定LiFeBO的晶体结构.
  • 研究结构调制及其对材料稳定性和离子导电性的影响.

主要方法:

  • 单晶X射线衍射的X射线衍射方法
  • 四维超空间群精细化研究
  • 固态混合密度函数理论计算
  • 债券价值总和映射 债券价值总和映射

主要成果:

  • 确定了相应的调制,将a轴沿线的格子周期率翻一番.
  • 这种精细的结构消除了先前的混乱,并揭示了LiO4四面体的有序1D链.
  • 该调制稳定了LiFeBO(3) 结构,并在脱时消失.
  • 对LiFeBO(3) 和FeBO(3) 的计算带间隙分别为3.5 eV和3.3 eV.
  • 确定了离子导电路径,这表明调制结构中的激活能量更高.

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Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway
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Identification and Quantification of Decomposition Mechanisms in Lithium-Ion Batteries; Input to Heat Flow Simulation for Modeling Thermal Runaway

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06:58

Zinc-Sponge Battery Electrodes that Suppress Dendrites

Published on: September 29, 2020

Construction and Testing of Coin Cells of Lithium Ion Batteries
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Construction and Testing of Coin Cells of Lithium Ion Batteries

Published on: August 2, 2012

结论:

  • 重定制的调制结构为LiFeBO提供了更准确的模型.
  • 结构调制增强了稳定性,但可能会影响离子扩散动力学.
  • 了解这些结构特征是优化LiFeBO(3) 作为正极材料的关键.