High-capacitance BiPO4 material with monoclinic/hexagonal crystalline phase heterostructure for aqueous asymmetric supercapacitors
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
High-capacitance BiPO4 material with monoclinic/hexagonal crystalline phase heterostructure for aqueous asymmetric supercapacitors
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
Result continuities
Project
<a href="/en/project/LL2101" target="_blank" >LL2101: Next Generation of 2D Monoelemental Materials</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Materials Today Chemistry
ISSN
2468-5194
e-ISSN
2468-5194
Volume of the periodical
40
Issue of the periodical within the volume
September 2024
Country of publishing house
GB - UNITED KINGDOM
Number of pages
12
Pages from-to
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UT code for WoS article
001280970200001
EID of the result in the Scopus database
2-s2.0-85199269738