通过基于粘土的离子热电装置收集体温
Parijat Pratim Das1, Raktim Gogoi1, Sanjay Biswas1
1Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India. g.raktim@iitg.ac.in.
Materials horizons
|January 21, 2026
概括
由粘土膜制成的离子热电器件收集人体热量,用于可穿戴电子产品. 这些设备利用大气湿度,并提供自我修复能力,以高效,低温发电.
科学领域:
- 材料科学 材料科学 材料科学
- 收集能源 收集能源
- 纳米技术 纳米技术
背景情况:
- 热电 (TE) 设备提供直接将热转化为电力,但面临着导电性权衡和高工作温度等挑战.
- 利用大气湿度的离子热电 (i-TE) 装置,为可穿戴电子设备提供可行的低温替代品.
- 重建的粘土膜为i-TE应用提供了一个新的平台,因为它们具有独特的纳米流体特性.
研究的目的:
- 通过离子热电效应来证明原子薄,重建的粘土膜在从体热中收集电力的潜力.
- 为了研究蒙特莫里隆尼特粘土 (MMT) 膜的离子热电特性.
- 在不同的湿度和温度条件下评估基于MMT的i-TE设备的性能和耐用性.
主要方法:
- 纳米流体膜的制备使用重建的蒙特莫里隆尼特粘土 (MMT) 层.
- 离子热电性质的表征,包括Seebeck系数 (Si) 和离子导电性.
- 通过在受控的温度差异和相对湿度 (RH) 下对人体皮肤施加电压时测量产生的电压来测试设备的性能.
主要成果:
- MMT膜表现出了出色的i-TE特性,Seebeck系数 (Si) 高达13.63 ± 1.13 mV K-1,这是由于介质离子的热传输.
- 离子导电性和Si随着大气湿度水平的上升而增加.
- 应用到皮肤时,MMT膜在85%的RH下产生高达63mV (ΔT=1.8K) 的电压,证明了有效的身体热量收集.
- 粘土膜显示出优越的热稳定性 (≤200°C5分钟) 和自我修复能力,与聚合物基设备相比.
结论:
- 原子薄的重建粘土膜有效地利用离子热电效应从体热中收集电力.
- MMT膜具有显著的优势,包括高的Seebeck系数,依赖湿度的性能,热稳定性和自我修复性.
- 这些发现突出了基于粘土的i-TE设备在可穿戴电子产品中可持续的低温电源的潜力.
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