高性能n型柔性无机热电气凝用于能量收集
Xiaodong Wang1,2, Wenbo Zhu3,4, Yijie Liu5
1School of Materials Science and Engineering, and Institute of Materials Genome & Big Data, Harbin Institute of Technology, Shenzhen 518055, P.R. China.
Science advances
|January 9, 2026
概括
研究人员开发了一种用于热电设备的新型无机气凝,实现了高性能和灵活性. 这一突破使得可穿戴技术的高效,轻量级的能量收集成为可能.
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:
- 气凝由于其轻质性和低导热性,对热电 (TE) 应用具有前景.
- 目前的TE气凝主要是p型有机或碳基气凝,性能有限 (zT<0.1在300K).
研究的目的:
- 开发第一个具有最先进的n型热电性能的无机气凝.
- 为了创建一个灵活而坚固的TE气凝,用于实际的能源采集应用.
主要方法:
- 为了制造无机气凝,采用了一步一步的合成策略.
- 优化重点是实现高透度 (95%) 以获得增强的 TE 特性.
- 使用生物灵感建筑的聚胺封装来提高机械强度.
主要成果:
- 优化的气凝显示出高功率系数 (34.8μW/m·K2) 和超低导热率 (0.061 W/m·K).
- 在300K时达到0.17的无维值 (zT),在383K时达到0.24的无维值.
- 一个TE发电机原型实现了76μW/g的重力计输出功率.
- 封装的气凝具有很高的压力强度 (1.4 kPa),同时保持了 TE 的性能.
结论:
- 这项工作提出了一种可通用的方法,用于设计高性能柔性无机气凝.
- 开发的TE气凝为轻量级可穿戴能源采集提供了新的可能性.
- 该研究克服了以前TE气凝的局限性,为先进的TE设备铺平了道路.
更多相关视频
相关概念视频
Electrical Energy
Using electric appliances for a longer period of time consumes more electrical energy and results in a higher electric bill. The energy produced by the transfer of electrons from one point to another is known as electrical energy. If power is delivered at a constant rate, the electrical energy can be defined as the product of power used by the device for a period of time. The energy unit on electric bills is the kilowatt-hour, where one kilowatt-hour is equivalent to 3.6 × 106 joules. The...
Induced Electric Fields: Applications
An important distinction exists between the electric field induced by a changing magnetic field and the electrostatic field produced by a fixed charge distribution. Specifically, the induced electric field is nonconservative because it does not work in moving a charge over a closed path. In contrast, the electrostatic field is conservative and does no net work over a closed path. Hence, electric potential can be associated with the electrostatic field but not the induced field. The following...
Energy Stored in Inductors
An inductor is ingeniously crafted to accumulate energy within its magnetic field. This field is a direct result of the current that meanders through its coiled structure. When this current maintains a steady state, there is no detectable voltage across the inductor, prompting it to mimic the behavior of a short circuit when faced with direct current.
In terms of gauging the energy stored within an inductor, it is equivalent to the integral of the power delivered at every individual moment, all...
In terms of gauging the energy stored within an inductor, it is equivalent to the integral of the power delivered at every individual moment, all...
P-N junction
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
Energy Line and Hydraulic Gradient Line
Based on Bernoulli's equation, the energy line (EL) and hydraulic grade line (HGL) provide graphical representations of energy distribution in a fluid flow system. For steady, incompressible, inviscid flows, Bernoulli's equation is expressed as:


