An electrochemical thermal transistor.,Nature Communications

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An electrochemical thermal transistor.
Nature Communications ( IF 14.7 ) Pub Date : 2018-10-30 , DOI: 10.1038/s41467-018-06760-7
Aditya Sood _{1,

2} , Feng Xiong _{1,

3,

4} , Shunda Chen ₅ , Haotian Wang _{1,

6} , Daniele Selli _{7,

8} , Jinsong Zhang ₁ , Connor J McClellan ₃ , Jie Sun _{1,

9} , Davide Donadio _{5,

10} , Yi Cui _{1,

11} , Eric Pop _{1,

3,

12} , Kenneth E Goodson _{1,

2}

Affiliation

Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305, USA.
Department of Mechanical Engineering, Stanford University, Stanford, CA, 94305, USA.
Department of Electrical Engineering, Stanford University, Stanford, CA, 94305, USA.
Department of Electrical and Computer Engineering, University of Pittsburgh, Pittsburgh, PA, 15261, USA.
Department of Chemistry, University of California, Davis, CA, 95616, USA.
Department of Chemical and Biomolecular Engineering, Rice University, Houston, TX, 77005, USA.
Max Planck Institute for Polymer Research, Ackermannweg 10, D-55128, Mainz, Germany.
Dipartimento di Scienza dei Materiali, Universita di Milano-Bicocca, 20125, Milano, Italy.
School of Chemical Engineering and Technology, Tianjin University, 300350, Tianjin, China.
Ikerbasque, Basque Foundation for Science, E-48011, Bilbao, Spain.
Stanford Institute for Materials and Energy Science, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA.
Precourt Institute for Energy, Stanford University, Stanford, CA, 94305, USA.

The ability to actively regulate heat flow at the nanoscale could be a game changer for applications in thermal management and energy harvesting. Such a breakthrough could also enable the control of heat flow using thermal circuits, in a manner analogous to electronic circuits. Here we demonstrate switchable thermal transistors with an order of magnitude thermal on/off ratio, based on reversible electrochemical lithium intercalation in MoS₂ thin films. We use spatially-resolved time-domain thermoreflectance to map the lithium ion distribution during device operation, and atomic force microscopy to show that the lithiated state correlates with increased thickness and surface roughness. First principles calculations reveal that the thermal conductance modulation is due to phonon scattering by lithium rattler modes, c-axis strain, and stacking disorder. This study lays the foundation for electrochemically-driven nanoscale thermal regulators, and establishes thermal metrology as a useful probe of spatio-temporal intercalant dynamics in nanomaterials.

中文翻译：

电化学热晶体管。

在纳米尺度上主动调节热流的能力可能会改变热管理和能量收集应用的游戏规则。这一突破还可以使用热电路以类似于电子电路的方式控制热流。_{在这里，我们展示了基于 MoS 2}薄膜中可逆电化学锂嵌入的具有一个数量级热开/关比的可切换热晶体管。我们使用空间分辨时域热反射来绘制设备运行期间的锂离子分布图，并使用原子力显微镜来显示锂化状态与厚度和表面粗糙度增加的相关性。第一性原理计算表明，热导调制是由锂响尾模式、c 轴应变和堆积无序引起的声子散射造成的。这项研究为电化学驱动的纳米级热调节器奠定了基础，并将热计量学确立为纳米材料时空插层动力学的有用探针。

更新日期：2018-10-31

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