超快的Na-Ion储存在无形化工程空心氧化物/MXene纳米混合体用于高性能离子混合电容器
Jun Yuan1,2, Duo Pan1, Junxiang Chen1
1State Key Laboratory of Structural Chemistry, and Fujian Provincial Key Laboratory of Materials and Techniques toward Hydrogen Energy, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian, 350002, China.
Advanced materials (Deerfield Beach, Fla.)
|November 5, 2024
概括
与N-doped MXene集成的无形氧化物空心球为混合电容器提供快速的储存. 这种设计提高了先进的能量存储设备的能量密度和循环稳定性.
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:
- 离子混合电容器 (SIHC) 对于高功率和能源需求至关重要.
- 在SIHC中,阳极材料面临着缓慢的动力学和循环不稳定的挑战.
- 原子失调和结构工程是改善阳极性能的关键策略.
研究的目的:
- 为SIHCs开发具有增强电荷存储能力的先进阳极材料.
- 为了研究N-doped MXene封装无形氧化物空心球体 (VOx@N-MXene HSs) 的结构和电化学特性.
- 阐明控制快速离子插入/提取的原子尺度机制.
主要方法:
- 合成N-doped MXene封装的无形氧化物空心球体 (VOx@N-MXene HSs).
- 利用机器学习潜力和分子模拟技术来分析材料结构和离子运输.
- 全面SIHC设备的制造和电化学测试.
主要成果:
- VOx@N-MXene HSs 呈现出多方向的开放通道和大量的空缺空间,用于快速的 Na+ 储存.
- 分子模拟证实了无形氧化物 (VOx) 的多孔结构,并阐明了反应机制.
- 在全SIHC设备中实现了高能量密度 (198.3 Wh kg-1) 和长期循环稳定性 (8000 个循环).
结论:
- 无形电极设计和结构工程对于高性能SIHCs是有效的.
- VOx@N-MXene高压电路为下一代电化学储能提供了一个有前途的阳极材料.
- 这项研究为设计用于能源设备的先进材料提供了宝贵的见解.
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