Studying δ-MnO2/reduced graphene oxide composite cathode in a low-temperature and high-voltage-tolerant hybrid electrolyte for aqueous Mg-ion batteries

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43927517" target="_blank" >RIV/60461373:22310/23:43927517 - isvavai.cz</a>
Result on the web
<a href="https://iopscience.iop.org/article/10.1088/2053-1583/acb278/meta" target="_blank" >https://iopscience.iop.org/article/10.1088/2053-1583/acb278/meta</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/2053-1583/acb278" target="_blank" >10.1088/2053-1583/acb278</a>

Result language
angličtina
Original language name
Studying δ-MnO2/reduced graphene oxide composite cathode in a low-temperature and high-voltage-tolerant hybrid electrolyte for aqueous Mg-ion batteries
Original language description
Optimization of the aqueous electrolyte concentration is a significant issue in the development of high-performance aqueous rechargeable magnesium ion batteries (MIBs). In this study, a novel magnesium ion-based hybrid electrolyte composed of 2 M magnesium sulfate (MgSO4)/2 M acetate (MgOAc) was designed, and its corresponding physiochemical properties were systemically investigated by simply tuning their molar ratios. Additionally, a δ-MnO2/reduced graphene oxide (rGO) composite cathode material was successfully synthesized and delivered a high specific capacity and excellent rate capability in the optimized hybrid electrolyte. The as-fabricated device based on the δ-MnO2/rGO composite cathode exhibited a high operating voltage of up to 2 V and delivered a maximum energy density of 29.8 Wh kg−1 at the power density of 823 W kg−1. More importantly, the device showed impressive discharge capacity and excellent cycling stability even at the low temperature of −20 °C. In view of the outstanding electrochemical properties of the δ-MnO2/rGO composite cathode in an optimized hybrid electrolyte of MgSO4/MgOAc, it could be regarded as a novel prototype for low-cost aqueous MIBs. © 2023 IOP Publishing Ltd.
Czech name
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Czech description
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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)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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