ORCID Profile
0000-0003-3746-9884
Current Organisation
Zhengzhou University
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Publisher: Springer Science and Business Media LLC
Date: 17-05-2021
DOI: 10.1038/S41467-021-23209-6
Abstract: Rechargeable multivalent metal ( e.g ., Ca, Mg or, Al) batteries are ideal candidates for large–scale electrochemical energy storage due to their intrinsic low cost. However, their practical application is h ered by the low electrochemical reversibility, dendrite growth at the metal anodes, sluggish multivalent–ion kinetics in metal oxide cathodes and, poor electrode compatibility with non–aqueous organic–based electrolytes. To circumvent these issues, here we report various aqueous multivalent–ion batteries comprising of concentrated aqueous gel electrolytes, sulfur–containing anodes and, high-voltage metal oxide cathodes as alternative systems to the non–aqueous multivalent metal batteries. This rationally designed aqueous battery chemistry enables satisfactory specific energy, favorable reversibility and improved safety. As a demonstration model, we report a room–temperature calcium-ion/sulfur| |metal oxide full cell with a specific energy of 110 Wh kg –1 and remarkable cycling stability. Molecular dynamics modeling and experimental investigations reveal that the side reactions could be significantly restrained through the suppressed water activity and formation of a protective inorganic solid electrolyte interphase. The unique redox chemistry of the multivalent–ion system is also demonstrated for aqueous magnesium–ion/sulfur||metal oxide and aluminum–ion/sulfur||metal oxide full cells.
Publisher: Wiley
Date: 28-02-2023
DOI: 10.1002/EEM2.12467
Abstract: Exploring the desired anode materials to address the issues of poor structural stability tardy redox kinetics caused by large potassium ionic radius are fatal for the realization of large‐scale applications of potassium‐ion batteries. In this work, the feasibility to achieve promoted K + storage by constructing the model of CoS 2 enfolded in carbon was verified by the density functional theory calculations. And the results predicted a faster electron otassium ion transport kinetics than bare CoS 2 by increasing electron carrier density and narrowing diffusion barrier. Therefore, an interfacial engineering strategy was applied and implemented to synthesize the CoS 2 nanoparticles enveloped in the S‐doped carbon (CoS 2 /SC) under this inspiration. The as‐prepared CoS 2 /SC composite exhibited a prominent rate capability and long cycling lifespan, delivering the high capacity of 375 mA h g −1 at 0.2 A g −1 at the 100th cycle and 273 mA h g −1 at 2 A g −1 over 300 cycles. The in/ex situ characterizations unraveled the converse mechanism of CoS 2 /SC in K + storage, showing an eventually reversible phase transformation of within the electrochemical reactions.
Publisher: American Chemical Society (ACS)
Date: 23-07-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1TA07270F
Abstract: The heterojunction interface presents strong electronic coupling interaction to boost the sodium otassium ion diffusion and enrich the active sites for ion adsorption, which enables Nb 2 O 5 @C to achieve excellent electrochemical performances.
Publisher: Elsevier BV
Date: 04-2016
Publisher: Research Square Platform LLC
Date: 18-01-2021
DOI: 10.21203/RS.3.RS-140085/V1
Abstract: Non–aqueous rechargeable multivalent metal (Ca, Mg, Al, etc. ) batteries are promising for large–scale energy storage due to their low cost. However, their practical applications face formidable challenges owing to low electrochemical reversibility and dendrite growth of multivalent metal anodes, sluggish kinetics of multivalent ion in metal oxide cathodes, and poor electrode compatibility of flammable organic electrolytes. To overcome these intrinsic hurdles, we develop aqueous multivalent ion batteries to replace the prevailing non–aqueous multivalent metal batteries by using wide–window super–concentrated aqueous gel electrolytes, the versatile high–capacity sulfur anodes, and high–voltage metal oxide cathodes. This rationally designed aqueous battery chemistry enables the long–lasting multivalent ion batteries featured with increased high energy density, reversibility and safety. As a demonstration model, a calcium ion−sulfur||metal oxide full cell exhibited a high energy density of 110 Wh kg –1 with outstanding cycling stability. Molecular dynamics modelling and experimental investigations revealed that the side reactions could be significantly restrained through the suppressed water activity and formation of protective inorganic solid electrolyte interphase in the aqueous gel electrolyte. The unique redox chemistry has also been successfully extended to aqueous magnesium ion and aluminum ion−sulfur||metal oxide batteries. This work will boost aqueous multivalent ion batteries for low−cost large–scale energy storage.
Location: United States of America
Location: United States of America
No related grants have been discovered for Yongzhu Fu.