增强的As-COF纳米通道作为K和离子电池的高容量阳极
Shehzad Ahmed1, Awais Ghani2, Imran Muhammad3
1College of Physics and Optoelectronic Engineering, Shenzhen University, Guangdong 518060, P. R. China. xqtian@szu.edu.cn.
Physical chemistry chemical physics : PCCP
|February 12, 2024
概括
以为基础的共价有机框架 (As-COFs) 对可充电电池具有前景. 这些工程纳米通道为和离子电池提供了高容量和稳定性.
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:
- 共价有机框架 (COF) 提供可调节的性能,用于储能.
- 可充电金属离子电池需要先进的电极材料,以提高容量和稳定性.
研究的目的:
- 为下一代可充电电池设计和研究一种基于的共价有机框架 (As-COF).
- 评估As-COF作为 (K) 和 (Ca) 离子电池的阳极材料的电化学性能.
主要方法:
- 使用p-phenylenediamine和hexachlorocyclotriphosphazene合成As-COF. 这是一个非常好的方法.
- 制造用于电池测试的基于As-COF的电极.
- 电化学表征包括容量,扩散障碍,开放电路电压和体积膨胀测量.
主要成果:
- 作为COF,它对K (Ca) 离子具有高储存能力,为914~2039 mA hg−1.
- 显示低的扩散障碍 (0.12~0.26 eV) 和低的开放电路电压 (0.23~0.18 V).
- 实现K (Ca) 离子的最小体积膨胀 (2.41~2.32%) ,确保结构完整性.
结论:
- 作为COF具有优良的阳极性质,可用于K和离子电池.
- 设计的纳米通道和材料稳定性有助于实现出色的电化学性能.
- 作为COF代表了朝着高容量可充电电池技术的重大进步.
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