The coupling between electrons and phonons is ubiquitous in condensed matter physics. In recent years, with the rise of two dimensional (2D) materials, electron–phonon interaction exhibits unique characteristics compared with their three‐dimensional counterparts. In this paper, research progress of electron–phonon interaction in 2D materials is briefly reviewed, mainly focus on thermoelectric device, conventional superconductor, field effect transistor, and photoelectric device. Firstly, electron–phonon interaction on thermoelectric application of 2D materials is concluded according to recent reports, and strategies to increase figure of merit are discussed. Next, strong electron–phonon coupling strength is essential for increasing transition temperature of superconductors. Conversely, electron–phonon interaction inhibits the carrier mobility for transport process. By summarizing research works in the past years, its role on the performance of 2D materials‐based field effect transistors is fully evaluated. Furthermore, the influences of electron–phonon interaction on light–matter interaction in 2D materials are briefly overviewed. Finally, some outlooks in the field are prospected. In a word, understanding electron–phonon interaction in 2D materials establishes strategically important directions for manipulating physical properties and optimizing device design.
Transition metal sulfide has been regarded as an ideal electrode material for supercapacitors due to its high energy density. However, the poor cyclic stability caused by low electroconductivity seriously limits its practical application. Herein, carbon nanotubes and nickel−cobalt bimetallic organic framework composites were prepared by the in situ growth method and used as precursors to prepare carbon nanotubes/nickel−cobalt bimetallic sulfide (CNTs/ Ni−Co−S-3) composites. Benefits from the synergy between the components, CNTs/Ni−Co−S-3, as a positive electrode material, presented an extremely high specific capacity of 734 C g −1 at 1 A g −1 and an improved rate capability. Furthermore, when CNTs/Ni− Co−S served as the positive electrode of the hybrid supercapacitor (CNTs/Ni−Co−S-3//AC HSC), the device provided a competitive energy density of 42.15 Wh kg −1 at the power density of 852 W kg −1 and long-term stability (88.46% of specific capacitance retention for 10000 cycles at 8 A g −1 ). This synthesis strategy provides a new pathway for further improving the energy density and cyclic stability of metallic sulfide group composite electrodes.
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