Oxygen-vacancy and phosphorus-doping enriched NiMoO4 nanoarrays for high-energy supercapacitors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F22%3A63558918" target="_blank" >RIV/70883521:28610/22:63558918 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2352152X22013123?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2352152X22013123?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.est.2022.105314" target="_blank" >10.1016/j.est.2022.105314</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Oxygen-vacancy and phosphorus-doping enriched NiMoO4 nanoarrays for high-energy supercapacitors

Popis výsledku v původním jazyce

Exploring electrode materials with high effective surface and abundant active sites takes on a critical significance in achieving high-energy supercapacitors. Herein, the oxygen vacancies (Ov) and P-doping enriched NiMoO4 nanosheet arrays were synthesized through the combination of phosphorization and N2 plasma treatment. The combination strategy makes it possible to sharply increase and modulate the Ov content. The optimized P-NiMoO4-N2 is found with the highest Ov content, and the capacitive activity is well consistent with the increase in the Ov content among all samples. As revealed by experimental results, rich Ov increases the electrochemically accessible active-sites while enhancing the intrinsic conductivity. Thus, the optimized P-NiMoO4-N2 is enabled to reach a high capacity of 2180 F g−1 at a current density of 1 A g−1 and remains 83.9 % at 10 A g−1 with high cycling stability. After being assembled with activated carbon as the negative electrode, the asymmetric supercapacitor exhibits a high energy density of 56.8 Wh kg−1 at 0.75 kW kg−1 and maintains 41.6 Wh kg−1 at 15 kW kg−1. This work may create a novel path to enrich and adjust Ov in metal oxides for high-capacity and high-power supercapacitors.

Název v anglickém jazyce

Oxygen-vacancy and phosphorus-doping enriched NiMoO4 nanoarrays for high-energy supercapacitors

Popis výsledku anglicky

Exploring electrode materials with high effective surface and abundant active sites takes on a critical significance in achieving high-energy supercapacitors. Herein, the oxygen vacancies (Ov) and P-doping enriched NiMoO4 nanosheet arrays were synthesized through the combination of phosphorization and N2 plasma treatment. The combination strategy makes it possible to sharply increase and modulate the Ov content. The optimized P-NiMoO4-N2 is found with the highest Ov content, and the capacitive activity is well consistent with the increase in the Ov content among all samples. As revealed by experimental results, rich Ov increases the electrochemically accessible active-sites while enhancing the intrinsic conductivity. Thus, the optimized P-NiMoO4-N2 is enabled to reach a high capacity of 2180 F g−1 at a current density of 1 A g−1 and remains 83.9 % at 10 A g−1 with high cycling stability. After being assembled with activated carbon as the negative electrode, the asymmetric supercapacitor exhibits a high energy density of 56.8 Wh kg−1 at 0.75 kW kg−1 and maintains 41.6 Wh kg−1 at 15 kW kg−1. This work may create a novel path to enrich and adjust Ov in metal oxides for high-capacity and high-power supercapacitors.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

<a href="/cs/project/LTT20005" target="_blank" >LTT20005: Spolupráce s asociací EASE na vývoji hybridního superkapacitoru</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Journal of Energy Storage

ISSN

2352-152X

e-ISSN

—

Svazek periodika

54

Číslo periodika v rámci svazku

Neuveden

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

nestrankovano

Kód UT WoS článku

000861690500008

EID výsledku v databázi Scopus

2-s2.0-85134614096