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一种新极材料Li₂FeGeO₄,具有由铁和元素控制的储存机制

Yang Gao¹, Yakun Tang¹, Lang Liu¹

¹State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi, Xinjiang, 830017, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)

|August 12, 2023

概括

铁基酸盐 (Li2FeGeO4) 显示出作为一种新阳极材料,用于高容量的离子电池和电容器. 酸处理优化其结构,以提高电化学性能.

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
无机化学无机化学

背景情况:

开发高容量阳极材料对于推进离子电池技术至关重要.
在原子尺度上将转换型 (Fe 基) 和合金型 (Ge 基) 氧化物结合起来,为新型阳极设计提供了一个有希望的策略.
像Li2FeGeO4这样的聚离子化合物具有独特的电化学特性.

研究的目的:

合成和描述Li2FeGeO4作为离子电池和电容器的潜在阳极材料.
研究酸对Li2FeGeO4.4的结构性质和电化学性能的影响.
为了阐明Li2FeGeO4在储能装置中的电化学反应机制.

主要方法:

用不同度的酸合成索尔凝.
预先材料的化.
使用X射线衍射 (XRD) 进行结构性表征.
电化学性能测试 (放电容量,循环稳定性).
在现场/操作特征技术 (XPS,XRD).

主要成果:

酸处理提炼了Li2FeGeO4的结晶性,并减少了Li2FeGeO4的颗粒大小,改善了颗粒分散.
用最佳数量的酸处理的LFG1样本在0.5 A g-1.1的200个循环后表现出669.7 mAh g-1的高放电容量.
电化学分析显示,反应机制包括铁/的转化和的合金.
在离子电池和水性离子电容器中,Li2FeGeO4作为阳极材料的有效性得到了证明.

结论:

2FeGeO4是一种新且有效的离子电池和离子电容器的阳极材料.
酸在优化Li2FeGeO4.4的微观结构和电化学性能方面发挥着关键作用.
协同转换和合金机制有助于Li2FeGeO4.4优越的储能能力.

关键词:

2FeGeO4 的使用方法酸是一种酸.离子电池是一种离子电池.离子电容器是一种离子电容.聚离子化合物聚离子化合物

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