在可穿戴能源收获器中探索基于皮拉的有机降氧对来提高热电性能
Chia-Yu Lee1, Ching-Chieh Hsu1, Chia-Hsin Wang2
1Department of Materials Science and Engineering, National Taiwan University, Taipei, 10617, Taiwan.
Small (Weinheim an der Bergstrasse, Germany)
|October 3, 2024
概括
热电池中的有机氧化还原对提供了一种用于可穿戴设备的废热转化为电力的新方法. 研究人员确定2,5-pyrazinedicarboxylic acid dihydrate (PDCA) 是增强热电发生器 (TEG) 的最佳材料.
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
- 能源转换 能源转换
背景情况:
- 使用热电池的热电发电机 (TEG) 为将低温废热转化为电力提供了一个有前途的途径.
- 有机氧化还原对因其无毒性和可调节性质,特别是离子Seebeck系数,非常适合用于可穿戴应用.
- 有机分子上的功能组修改可以显著影响热电性能.
研究的目的:
- 为了对基于pyrazine的有机氧化还原配对进行比较分析,这些配对具有不同的功能组,用于热电应用.
- 用计算方法研究分子结构对离子Seebeck系数的影响.
- 为可穿戴设备开发和评估基于水凝的热电发电机.
主要方法:
- 循环电压测量被用来研究不同温度下的基于pyrazine的氧化还原对.
- 密度函数理论 (DFT) 的计算用于确定静电电位和理解函数组效应.
- 合成了一种包含聚乙烯醇和聚烯胺的双网络水凝,以容纳最佳氧化还原对 (PDCA).
主要成果:
- 在各种pyrazine化合物中观察到变化的显著差异,将2,5-pyrazinedicarboxylic acid dihydrate (PDCA) 确定为最有前途的候选物.
- 冠军的水凝装置实现了2.99mVK-1的高离子Seebeck系数 (Si),具有良好的离子和热导电性.
- 一个由36个PDCA注入的水凝单元构建的热电发电机 (TEG) 显示出≈0.28μW的功率输出,能够为小型LED供电.
结论:
- 基于pyrazine的有机氧化还原配对显示了可穿戴设备中高效的热电能转换的巨大潜力.
- PDCA作为一种最佳的有机材料,可以提高热电发电机的性能.
- 开发的基于水凝的TEG证明了用于利用废热为小型电子元件供电的实际应用.
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