合成温度对酸基阴极对双离子电池性能的影响
Xuan Wang1, Jianlin Li1, Yifan Liu1
1Engineering Research Center of Energy Storage Materials and Devices, Ministry of Education, School of Chemistry, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.
ChemSusChem
|September 25, 2024
概括
研究人员开发了一种基于phenazine的多孔有机聚合物,PDPPZ-165°C,用于双离子电池. 这种材料表现出增强的电化学性能,为可持续的储能解决方案提供了一个有希望的途径.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 有机材料由于可持续性和可设计性,对电化学储能具有吸引力.
- 挑战包括电导率低和聚合,阻碍电池的性能.
- 基于纳的聚合物提供了潜力,但需要形态优化.
研究的目的:
- 通过合成温度来修改聚5,10-二烯 (PDPPZ) 的形态.
- 为了提高PDPPZ在双离子电池中的电化学性能.
- 研究有机阴极材料的结构性质关系.
主要方法:
- 在不同温度下合成PDPPZ,重点是PDPPZ-165°C.
- 形态特征鉴定用于识别多孔结构.
- 电化学测试PDPPZ-165°C作为二离子电池中的阴极材料.
主要成果:
- 在PDPPZ-165°C的温度下,它呈现出异常多孔的结构,促进了快速的电荷转移和扩散.
- 在40°C时达到119.2mAhg-1的特定容量,证明了出色的速率能力.
- 在0.5°C的高负载下 (16 mg cm-2) 输送124.7 mAh g-1和500个循环后86.4%的容量保留.
结论:
- PDPPZ-165°C的多孔形态显著改善了反应动力学和电化学性能.
- 优化的有机阴极材料显示出对高性能双离子电池的巨大希望.
- 这项研究为设计用于储能的先进有机电极材料提供了洞察力.
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