Nanostructured boron-doped ultra-nanocrystalline diamond micro-pyramids: efficient electrochemical supercapacitors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00616764" target="_blank" >RIV/68378271:_____/25:00616764 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0366009" target="_blank" >https://hdl.handle.net/11104/0366009</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/smll.202407514" target="_blank" >10.1002/smll.202407514</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nanostructured boron-doped ultra-nanocrystalline diamond micro-pyramids: efficient electrochemical supercapacitors

Popis výsledku v původním jazyce

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 (SiP) using a simple reactive ion etching (RIE) process. During the etching process, the high aspect ratio and the induction of sp2 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/SiP 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/SiP’s potential for advancing miniaturized supercapacitors with high capacitance retention, cycle stability, and energy density.

Název v anglickém jazyce

Nanostructured boron-doped ultra-nanocrystalline diamond micro-pyramids: efficient electrochemical supercapacitors

Popis výsledku anglicky

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 (SiP) using a simple reactive ion etching (RIE) process. During the etching process, the high aspect ratio and the induction of sp2 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/SiP 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/SiP’s potential for advancing miniaturized supercapacitors with high capacitance retention, cycle stability, and energy density.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Small

ISSN

1613-6810

e-ISSN

1613-6829

Svazek periodika

21

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

2407514

Kód UT WoS článku

001377476700001

EID výsledku v databázi Scopus

2-s2.0-85212116811