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Voltaic/Galvanic Cells

Voltaic/Galvanic Cells

Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...

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Updated: Jun 11, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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Published on: August 12, 2013

高性能4.6V LiCoO₂ 阴极材料通过表面格子调制实现.

Qi-Wen Liu^1,2, Si-Jie Guo¹, Xin-Cheng Lei³

¹CAS Key Laboratory of Molecular Nanostructure and Nanotechnology and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry Chinese Academy of Sciences (ICCAS), Beijing, P. R. China.

Advanced materials (Deerfield Beach, Fla.)

|December 26, 2025

概括

此摘要是机器生成的。

高压氧化 (LCO) 阴极通过使用一种新的分解诱导的重建过程实现更大的容量. 这种方法提高了表面稳定性,使离子电池具有高能量密度.

关键词:

液态CO2O2的使用情况.离子电池是一种离子电池.高压阴极材料的高压材料.表面格子调制的表面格子调制.

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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:

将氧化 (LCO) 阴极电压提高到4.6V,可以提高可逆容量.
更高的电压为LCO阴极带来了重大的稳定性挑战.

研究的目的:

为了提高高压LCO阴极的稳定性,同时保持高容量.
为了开发一个精确的表面修改技术LCO.

主要方法:

分解诱导重建 (DIR) 过程.
用符合规格的Y(OH) CO3纳米涂层LCO.
控制的烧结以诱导碳化合物的分解和表面格子的转变.

主要成果:

DIR工艺在LCO阴极上创造了一个稳定的,类似岩盐的表面结构.
经过修改的LCO阴极在0.1°C下达到215.8mAhg-1的容量,在4.6V的100个循环后保持93.0%的容量.
经过长期循环稳定性 (85.5%对1C 500次循环后13.6%) 和在恶劣条件下的性能.

结论:

表面化学工程对于克服高压LCO阴极的稳定性问题至关重要.
DIR方法为开发强大,高能量密度的离子电池阴极提供了精确的控制.
这种方法为未来的电池材料开发提供了宝贵的见解.