4.8 Article

A Two-Dimensional Borophene Supercapacitor

Journal

ACS MATERIALS LETTERS
Volume 4, Issue 10, Pages 1929-1936

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acsmaterialslett.2c00475

Keywords

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Funding

  1. Iran National Science Foundation
  2. German Research Foundation (DFG) [SPP2196, 431314977/GRK 2642]
  3. Spanish Ministry of Science and Education [PCI2020-112185, IDI-20210171]
  4. Federal Ministry for Economic Affairs and Energy [FKZ 03EE1070B, FKZ 03EE1070A]
  5. European Commission within the EU Framework Programme for Research and Innovation HORIZON 2020 (Cofund ERA- NET Action) [786483]

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This study introduces a new two-dimensional borophene-based supercapacitor that is produced using a chemical vapor deposition method. The results show that this supercapacitor has a high specific capacity and outperforms previous boron-based supercapacitors as well as other two-dimensional materials in terms of electrochemical performance.
This work introduces a new two-dimensional (2D) borophene-based (BB) supercapacitor produced by a chemical vapor deposition method and used in the facile fabrication of nanosupercapacitors (spin-coating on graphite substrates). Structural properties of the as-prepared borophene sheets are fully characterized via AFM, HRTEM, and FESEM, and Raman spectrum of the 2D sheets is scrutinized and discussed, as well as the electrochemical response of the fabricated nanosupercapacitors. A high specific capacity (sCap) of 350 F g(-1) is attributed to the device according to the electrochemical tests, that is almost three times higher than previous boron-based supercapacitors and surpasses the best reported 2D materials including graphene. Based on the surface charge-storage mechanism, it is posited that the electrical conductivity and surface area of 2D electrode materials highly affect the performance of the supercapacitor. Simulation studies are also conducted using joint density-functional theory (JDFT), the results of which are in agreement with the reported outcomes of experiments. Application of the newly synthesized 2D BB supercapacitors in the current study is expected to be promising in the energy storage field, inventive class of sensing devices, as well as novel highly sensitive biosensors.

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