High-capacitance BiPO4 material with monoclinic/hexagonal crystalline phase heterostructure for aqueous asymmetric supercapacitors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F24%3A43929995" target="_blank" >RIV/60461373:22310/24:43929995 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2468519424003008" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2468519424003008</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.mtchem.2024.102194" target="_blank" >10.1016/j.mtchem.2024.102194</a>

Jazyk výsledku

angličtina

Název v původním jazyce

High-capacitance BiPO4 material with monoclinic/hexagonal crystalline phase heterostructure for aqueous asymmetric supercapacitors

Popis výsledku v původním jazyce

Aqueous asymmetric supercapacitor devices generally have a fairly high power density, but their practical application is still limited by low energy density due to lack of high-capacity electrode materials, particularly anode materials. Herein, a novel anode material, BiPO4 material with monoclinic/hexagonal crystalline phase heterostructure was synthesized by a simple solvothermal approach. This unique heterostructure, composed of hexagonal and monoclinic nanoparticles, exhibits a large specific surface area, numerous active sites and high ion diffusion rate, all of which contribute to an enhanced specific capacitance in the energy storage process. Besides, the heterogeneous interface formed between two different crystalline phase nanoparticles is regarded as an excellent ion channel, accelerating diffusion and reaction of electrolyte ions. The acquired BiPO4 material serves as anode for aqueous supercapacitors, displaying a superior specific capacitance of 954 F g- 1 (265 mAh g- 1) at 1 A g- 1 current density, maintaining up to 600 F g- 1 (166.7 mAh g- 1) at 10 A g- 1. In order to match the BiPO4 anode, high-capacity (3662 F g- 1 (508.61 mAh g- 1) at 1 A g- 1) cobalt-nickel phosphate micron-sheets (NiCo2(PO4)2) synthesized via hydrothermal method followed by calcination under argon were selected as cathode material. The assembled aqueous asymmetric supercapacitor employing NiCo2(PO4)2 as cathode and BiPO4 as anode yields a high energy density of 98.17 Wh kg- 1 at a power density of 846.49 W kg- 1.

Název v anglickém jazyce

High-capacitance BiPO4 material with monoclinic/hexagonal crystalline phase heterostructure for aqueous asymmetric supercapacitors

Popis výsledku anglicky

Aqueous asymmetric supercapacitor devices generally have a fairly high power density, but their practical application is still limited by low energy density due to lack of high-capacity electrode materials, particularly anode materials. Herein, a novel anode material, BiPO4 material with monoclinic/hexagonal crystalline phase heterostructure was synthesized by a simple solvothermal approach. This unique heterostructure, composed of hexagonal and monoclinic nanoparticles, exhibits a large specific surface area, numerous active sites and high ion diffusion rate, all of which contribute to an enhanced specific capacitance in the energy storage process. Besides, the heterogeneous interface formed between two different crystalline phase nanoparticles is regarded as an excellent ion channel, accelerating diffusion and reaction of electrolyte ions. The acquired BiPO4 material serves as anode for aqueous supercapacitors, displaying a superior specific capacitance of 954 F g- 1 (265 mAh g- 1) at 1 A g- 1 current density, maintaining up to 600 F g- 1 (166.7 mAh g- 1) at 10 A g- 1. In order to match the BiPO4 anode, high-capacity (3662 F g- 1 (508.61 mAh g- 1) at 1 A g- 1) cobalt-nickel phosphate micron-sheets (NiCo2(PO4)2) synthesized via hydrothermal method followed by calcination under argon were selected as cathode material. The assembled aqueous asymmetric supercapacitor employing NiCo2(PO4)2 as cathode and BiPO4 as anode yields a high energy density of 98.17 Wh kg- 1 at a power density of 846.49 W kg- 1.

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/LL2101" target="_blank" >LL2101: Příští Generace Monoelementárních 2D Materiálů</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Materials Today Chemistry

ISSN

2468-5194

e-ISSN

2468-5194

Svazek periodika

40

Číslo periodika v rámci svazku

September 2024

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

—

Kód UT WoS článku

001280970200001

EID výsledku v databázi Scopus

2-s2.0-85199269738