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δ-VOPO4作为水性离子电池的高压阴极材料
Dong Zhao1, Xiangjun Pu2, Shenglong Tang1
1Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, School of Power and Mechanical Engineering, Wuhan University Wuhan 430072 China zxchen_pmc@whu.edu.cn dingmy@whu.edu.cn.
Chemical science
|August 4, 2023
概括
酸三角氧瓦纳 (δ-VOPO4) 作为水性离子电池 (AZIB) 的阴极材料表现出卓越的性能. 这种新材料提供了较高的电压和较高的循环稳定性,与分层对应物相比.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 水性离子电池 (AZIB) 由于安全性和成本优势,对大规模储能充满希望.
- 多层氧瓦酸二水合物 (VOPO4·2H2O) 显示出作为AZIB阴极的潜力,但患有低电压和低循环稳定性.
研究的目的:
- 引入三角氧酸 (δ-VOPO4) 作为AZIBs的新型阴极材料.
- 为了评估AZIB中的δ-VOPO4的电化学性能,并将其与分层VOPO4·2H2O进行比较.
- 阐明控制瓦纳基酸盐阴极性能的结构性质关系.
主要方法:
- δ-VOPO4.4的合成和表征.
- 在AZIB中作为阴极的δ-VOPO4的电化学测试,包括静电循环和速率能力测试.
- 结构分析和理论计算以了解性能.
主要成果:
- 与分层VOPO4·2H2O相比, δ-VOPO4具有更高的放电电压 (1.46V).
- δ-VOPO4在1°C的温度下提供122.6 mA hg−1的特定容量,在10°C的1000个循环后保持90.88 mA hg−1.
- 新型 δ-VOPO4 阴极在AZIBs中显示出增强的性能和稳定性.
结论:
- δ-VOPO4是高性能AZIB的有前途的阴极材料,其性能优于其分层对应物.
- 了解瓦纳基酸盐的结构功能关系是开发先进阴极材料的关键.
- 这项工作为在AZIB应用中进一步探索瓦纳基酸盐开辟了道路.
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