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相关概念视频

Metal-Ligand Bonds02:51

Metal-Ligand Bonds

The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes.
In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...

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相关实验视频

Updated: May 9, 2026

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
10:03

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Published on: November 12, 2013

双功能兰兴奋剂:通过同时缓解Na+/空位排序和氧气释放来稳定阴极.

Mingjie Dong1, Jiale Chen2,3, Wei Cao2,3

  • 1School of Advanced Materials, Peking University, Shenzhen Graduate School, Shenzhen 518055, China.

Chem & bio engineering
|March 4, 2026
PubMed
概括

将 (La) 引入P2型离子电池阴极,通过抑制氧气释放和改善离子分布,提高了稳定性和速率性能. 这种拉策略提高了先进电池材料的能量密度和循环稳定性.

关键词:
基于/的分层氧化物.在现场进行重新安排.Na+/空缺排序 排序 排序阳离子氧化还原剂兰他的兴奋剂使用.

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Growth and Electrostatic/chemical Properties of Metal/LaAlO3/SrTiO3 Heterostructures
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Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
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Last Updated: May 9, 2026

Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques
10:03

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Published on: November 12, 2013

Growth and Electrostatic/chemical Properties of Metal/LaAlO3/SrTiO3 Heterostructures
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Published on: February 8, 2018

Tuning Oxide Properties by Oxygen Vacancy Control During Growth and Annealing
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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
  • 固态化学 固态化学

背景情况:

  • P2型分层氧化物 (NaxLiyMn1-yO2) 是有前途的离子电池阴极,因为其来自离子氧化还原的高容量.
  • 挑战包括Na+/空缺排序和不可逆转的氧气释放,限制速率能力和稳定性.

研究的目的:

  • 为了研究微量 (La) 兴奋剂对P2-Na0.6Li0.2Mn0.8O2阴极性能的影响.
  • 阐明La对离子分布,氧稳定性和电化学性质的影响背后的机制.

主要方法:

  • 合成拉多P2型分层氧化物.
  • 电化学测试 (循环,速度能力).
  • 在现场/现场表征和理论计算.

主要成果:

  • 兴奋剂改变了Na+的分布,并抑制了Na+/空缺的排序.
  • 高的LaO键能稳定了网状氧,防止了不可逆转的氧释放.
  • 优化的La-doped阴极 (LM-La0.04) 显示出高容量 (193.5 mAh g-1 在0.2 C) 和出色的速率性能 (86.8 mAh g-1 在10 C).
  • 在长期循环期间观察到显著的容量保留.

结论:

  • 痕迹激活是提高P2型层氧化物阴极电化学性能的一种有效策略.
  • 兰通过稳定氧气和修改离子动态来改善结构完整性和氧化还原可逆性.
  • 这项工作提供了一种可行的兴奋剂方法,用于开发用于离子电池的高能,稳定的阴离子-氧化解极材料.