Nanostructured Boron-Doped Ultra-Nanocrystalline Diamond Micro-Pyramids: Efficient Electrochemical Supercapacitors.

Autor: Suman S; CSIR-Institute of Minerals and Materials Technology, Bhubaneswar, 751013, India.; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India., Sharma DK; Institute of Physics of the Czech Academy of Sciences, Prague, 16200, Czech Republic., Szabo O; Institute of Physics of the Czech Academy of Sciences, Prague, 16200, Czech Republic., Rakesh B; CSIR-Institute of Minerals and Materials Technology, Bhubaneswar, 751013, India.; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India., Marton M; Institute of Electronics and Photonics, Slovak University of Technology, Bratislava, 81219, Slovakia., Vojs M; Institute of Electronics and Photonics, Slovak University of Technology, Bratislava, 81219, Slovakia., Sankaran KJ; CSIR-Institute of Minerals and Materials Technology, Bhubaneswar, 751013, India.; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India., Kromka A; Institute of Physics of the Czech Academy of Sciences, Prague, 16200, Czech Republic.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 Dec 15, pp. e2407514. Date of Electronic Publication: 2024 Dec 15.
DOI: 10.1002/smll.202407514
Abstrakt: The miniaturization of electrochemical supercapacitors (EC-SCs) requires electrode materials that are both durable and efficient. Boron-doped diamond (BDD) films are an ideal choice for EC-SC due to their durability and exceptional electrochemical performance. In this study, nanostructured boron-doped ultra-nanocrystalline diamonds (NBUNCD) are fabricated on Si micro-pyramids (Si P ) using a simple reactive ion etching (RIE) process. During the etching process, the high aspect ratio and the induction of sp 2 graphite in these nanorod electrodes achieved a maximum specific capacitance of 53.7 mF cm -2 at a current density of 2.54 mA cm -2 , with a 95.5% retention after 5000 cycles. Additionally, the energy density reached 54.06 µW h cm -2 at a power density of 0.25 µW cm -2 . A symmetric pouch cell using NBUNCD/Si P exhibited a specific capacitance of 0.23 mF cm -2 at 20 µA cm -2 , an energy density of 31.98 µW h cm -2 , and a power density of 0.91 µW cm -2 . These superior EC properties highlight NBUNCD/Si P 's potential for advancing miniaturized supercapacitors with high capacitance retention, cycle stability, and energy density.
(© 2024 The Author(s). Small published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
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