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揭示[CoO]₆微结构在LiCoO₂的控制的伪电容性中的作用

Jia-Liang Peng¹, Yin-Lin Luo¹, Jian-Xi Li¹

¹School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials/Guangzhou Key Laboratory for Clean Energy and Materials/Huangpu Hydrogen Innovation Center/Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, China.

|January 22, 2024

概括

通过化学去化LiCoO2,可以创建可调节的[CoO]6八面体,大大提高了超级电容器的性能. 这种应变工程通过允许更快的氧化还原反应来提高能量储存,从而提高了特定容量.

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
纳米技术纳米技术

背景情况:

优化超级电容电极需要了解氧化物中伪电容性的结构性质关系.
对氧化物中[CoO]6八面体的微结构洞察力仍然有限,阻碍了针对性设计以提高性能.

研究的目的:

为了研究可调节的[CoO]6八面体对 LiCoO2 的电化学特性对超级电容器应用的影响.
探索一种化学脱化策略,以修改LiCoO2的微观结构并增强其伪电容性行为.

主要方法:

化学解化LiCoO2以产生具有修改的[CoO]6八面体的Li(x) CoO2材料.
结构特征分析c轴应变和晶体层间距变化.
在电流密度为10 mA g-1.的电化学测试中评估特定容量和氧化还原动力学.

主要成果:

在LiCoO2中通过化学脱成功实现了可调节的[CoO]6八面体微结构.
脱化Li{0.75) Co{O) 2的特定容量几乎是原始LiCoO2的四倍.
增强的活性归因于[CoO]6八面体中的不对称应变,改善电子导电性和Co-O杂交以获得更快的氧化还原动力学.

结论:

化学脱是一种有效的策略,用于调整LiCoO2.2中的[CoO]6八面体微观结构.
[CoO]6八面体的应变工程显著提高了超级电容器中的伪电容和电化学性能.
这项工作为改造过渡金属氧化物用于先进的储能应用提供了新的见解.

关键词:

氧化物氧化物液态CO2O2的使用情况.微观结构的微观结构伪电容器是一种伪电容器.压力应变是一种压力.

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