Electrodeposited cation-intercalated δ-MnO2 nanosheets on free-standing graphitic nanofibers for aqueous magnesium-ion supercapacitors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43932255" target="_blank" >RIV/60461373:22310/25:43932255 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/abs/pii/S2352152X25022844" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S2352152X25022844</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.est.2025.117571" target="_blank" >10.1016/j.est.2025.117571</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electrodeposited cation-intercalated δ-MnO2 nanosheets on free-standing graphitic nanofibers for aqueous magnesium-ion supercapacitors

Popis výsledku v původním jazyce

This study presents a straightforward electrodeposition method to produce nanostructured K+-intercalated S-MnO2 (KMO) on free-standing graphitic nanofibers (GNFs), known as GNF@KMO. This serves as a highly effective binder-free cathode for aqueous magnesium-ion capacitors (AMICs). GNF@KMO boasts a distinctive structural design that improves electronic and ionic conductivity, enabling the electrode to demonstrate excellent electrolyte penetration at the interface. The resultant GNF@KMO composite electrode achieved a specific capacity of 91.18 mAh g- 1 at a current density of 0.5 A g-1. Even at a higher current density of 4 A g- 1, it retained a capacity of 51.88 mAh g- 1, showcasing a capacity retention of 57 %. Furthermore, the AMIC device utilizing the GNF@KMO cathode and activated carbon anode exhibited an impressive capacity of 32.51 mAh g- 1, retaining around 88.24 % of its initial capacity after 20,000 cycles at a current density of 2.0 A g-1. This research highlights the potential of one-dimensional carbon materials decorated with electrodeposited cation-intercalated S-MnO2 nanostructures as promising candidates for efficient cathode materials in Mg-ion energy storage systems.

Název v anglickém jazyce

Electrodeposited cation-intercalated δ-MnO2 nanosheets on free-standing graphitic nanofibers for aqueous magnesium-ion supercapacitors

Popis výsledku anglicky

This study presents a straightforward electrodeposition method to produce nanostructured K+-intercalated S-MnO2 (KMO) on free-standing graphitic nanofibers (GNFs), known as GNF@KMO. This serves as a highly effective binder-free cathode for aqueous magnesium-ion capacitors (AMICs). GNF@KMO boasts a distinctive structural design that improves electronic and ionic conductivity, enabling the electrode to demonstrate excellent electrolyte penetration at the interface. The resultant GNF@KMO composite electrode achieved a specific capacity of 91.18 mAh g- 1 at a current density of 0.5 A g-1. Even at a higher current density of 4 A g- 1, it retained a capacity of 51.88 mAh g- 1, showcasing a capacity retention of 57 %. Furthermore, the AMIC device utilizing the GNF@KMO cathode and activated carbon anode exhibited an impressive capacity of 32.51 mAh g- 1, retaining around 88.24 % of its initial capacity after 20,000 cycles at a current density of 2.0 A g-1. This research highlights the potential of one-dimensional carbon materials decorated with electrodeposited cation-intercalated S-MnO2 nanostructures as promising candidates for efficient cathode materials in Mg-ion energy storage systems.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20700 - Environmental engineering

Projekt

—

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

Journal of Energy Storage

ISSN

2352-152X

e-ISSN

2352-1538

Svazek periodika

131

Číslo periodika v rámci svazku

30 September 2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

nestránkováno

Kód UT WoS článku

001530376300002

EID výsledku v databázi Scopus

2-s2.0-105009881665