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Designed One-Pot Strategy for Dual Carbon Protected Na3V2(PO4)3 Hybrid Structure as High-Rate and Ultrastable Cathode for Sodium-ion Batteries.

08:00 EDT 12th July 2019 | BioPortfolio

Summary of "Designed One-Pot Strategy for Dual Carbon Protected Na3V2(PO4)3 Hybrid Structure as High-Rate and Ultrastable Cathode for Sodium-ion Batteries."

Sodium-ion batteries have attracted tremendous attention due to its much lower cost and similar working principle compared with lithium-ion batteries, which have been placed great expectation as energy storage devices in grid-level applications. Sodium superionic conductor structured Na3V2(PO4)3 has been considered as a promising cathode candidate while its intrinsic low electronic conductivity results in poor rate performance and unsatisfactory cycling performance, which severely impedes its potential for practical applications. Herein, we developed a facile one-pot strategy to construct dual carbon protected hybrid structure composed of carbon coated Na3V2(PO4)3 nanoparticles embedded with carbon matrix with excellent rate performance, superior cycling stability and ultralong lifespan. Specifically, it can deliver an outstanding rate performance with a 51.5% capacity retention from 0.5 to 100 C and extraordinary cycling stability of 80.86% capacity retention after 6000 cycles at the high rate of 20 C. The possible reasons for the enhanced performance could be understood as the synergistic effects of the strengthened structural robust, facilitated charge transfer kinetics and mesoporous feature of the Na3V2(PO4)3 hybrid structure. This work provides a cost-effective strategy to effectively optimize electrochemical performance of Na3V2(PO4)3 cathode, which could contribute to push forward the advance of its practical applications.

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This article was published in the following journal.

Name: Chemistry (Weinheim an der Bergstrasse, Germany)
ISSN: 1521-3765
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