A Flexible and Infrared-Transparent Bi2Te3-Carbon Nanotube Thermoelectric Hybrid for both Active and Passive Cooling,ACS Applied Electronic Materials

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A Flexible and Infrared-Transparent Bi2Te3-Carbon Nanotube Thermoelectric Hybrid for both Active and Passive Cooling
ACS Applied Electronic Materials ( IF 4.3 ) Pub Date : 2020-08-23 , DOI: 10.1021/acsaelm.0c00617
Ying Li _{1,

2} , Yang Zhao _{1,

2} , Jixiang Qiao _{1,

2} , Song Jiang _{1,

3,

4,

5} , Jianhang Qiu _{1,

2} , Jun Tan _{1,

2} , Lili Zhang ₆ , Zhigang Gai ₇ , Kaiping Tai _{1,

2} , Chang Liu _{1,

2}

Affiliation

On-demand thermal management based on the Peltier effect of thermoelectric (TE) materials has attracted great attention due to its unique advantages of a simple structure, no moving parts, quietness, compactness, and precise temperature control. However, conventional bulk TE materials are inherently rigid, and it is therefore difficult to acquire close contact with heat sources and heat sinks with complex geometries, resulting in poor heat transfer and cooling ability. In addition, they are optically opaque and dense, blocking passive heat dissipation by thermal radiation and air convection. Tailoring TE materials with mid-infrared (IR) transparency and good flexibility to achieve both active and passive cooling remains a great challenge. Here, we report a nanoporous TE hybrid composed of (000l)-textured n-type Bi₂Te₃ nanocrystals anchored on a single-wall carbon nanotube (SWCNT) network. It achieves an in-plane power factor of ∼265 μW m^–1 K^–2 and a low thermal conductivity of ∼0.34 W m^–1 K^–1, yielding a TE figure of merit (ZT) value of ∼0.23 in the temperature range from room temperature to ∼373 K. This hybrid has excellent flexibility and a maximum IR transparency of ∼16%. Our results open a way to develop efficient TEs with both active and passive cooling abilities.

中文翻译：

用于主动和被动冷却的柔性且红外透明的Bi ₂ Te _3-碳纳米管热电混合体

基于热电（TE）材料的珀尔帖效应的按需热管理因其结构简单，无活动部件，安静，紧凑和精确的温度控制的独特优势而备受关注。然而，常规的块状TE材料固有地是刚性的，因此难以与具有复杂几何形状的热源和散热器紧密接触，从而导致差的热传递和冷却能力。此外，它们在光学上不透明且致密，通过热辐射和空气对流阻止了被动散热。定制具有中红外（IR）透明性和良好灵活性以实现主动和被动冷却的TE材料仍然是一个巨大的挑战。在这里，我们报告了由（000 l质构化的n型Bi ₂ Te ₃纳米晶体锚定在单壁碳纳米管（SWCNT）网络上。它的面内功率因数约为265μWm ^–1 K ^–2，导热系数较低，约为0.34 W m ^–1 K ^–1，在温度下的TE品质因数（ZT）值为0.23。温度范围从室温到373K。这种混合材料具有出色的柔韧性和最大16％的IR透明度。我们的结果为开发具有主动和被动冷却能力的高效TE提供了一种途径。

更新日期：2020-09-22

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