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二氧化瓦纳/碳核心外复合物的单步热水合成,用于水性离子电池的改进的离子存储

Xianfang Tan¹, Fangfang Zhang¹, Dongzhi Chen²

¹Hubei Key Laboratory of Radiation Chemistry and Functional Materials, School of Nuclear Technology and Chemistry & Biology, Hubei University of Science and Technology, Xianning 437100, PR China.

Journal of colloid and interface science

|May 4, 2024

概括

碳涂层的二氧化纳米带 (VO2@C) 显著提高了离子 (NH4+) 电池的性能. 这种新的核心外结构改善了离子运输和容量,为先进的储能解决方案铺平了道路.

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:

水性非金属离子电池具有成本效益,可持续性和安全性.
离子 (NH4+) 电池作为一个有前途的储能技术,正在引起人们的注意.
二氧化瓦纳 (VO2) 是储存NH4+的潜在宿主材料,但其电化学特性需要改进.

研究的目的:

为了设计一种新的碳涂层VO2纳米带 (VO2@C) 核心外结构.
增加VO2的氨离子 (NH4+) 储存能力.
研究NH4+电池中VO2@C的电化学性能和储存机制.

主要方法:

在热水条件下通过减少氧化的葡萄糖合成VO2@C核心外纳米带.
电化学表征包括特定容量,循环稳定性和速率能力测量.
使用VO2@C作为阳极和聚氨 (PANI) 作为阴极制造和测试一个完整的电池电池.

主要成果:

这种VO2@C复合材料在0.1A/g时具有约300mAh/g的特定容量,其性能优于裸体VO2 (约238mAh/g).
碳涂层增强了质量转移,离子运输和电化学动力学.
充满VO2@C//PANI电池的容量在0.2A·g-1下达到约185mAh·g-1,在1500个循环后保持93%的容量,能量密度高 (58Wh·kg-1).

结论:

VO2@C核心外结构是用于储存离子 (NH4+) 的高效电极材料.
增强的性能归因于改进的离子传输和由碳涂层促进的动力学.
这项工作为设计高性能水性NH4+电池的先进复合材料提供了一个可行的策略.

关键词:

离子电池是使用离子电池的.碳碳碳碳碳核心-外结构核心-外结构电化学性质电化学性质 VO (((2)@C) 的时间.

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