DataVXACS Applied Materials & InterfacesPaper
journal article·2022-05-04

Effects of Valence States of Working Cations on the Electrochemical Performance of Sodium Vanadate

Wenchao Bi, Xiaodi Jiang, Chao Li, Yuan Liu, Guohua Gao, Guangming Wu, Muhammad Atif, Mohamad AlSalhi, Guozhong Cao

ACS Applied Materials & Interfaces· Volume 14· Issue 17
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Source abstract

Abstract

Supercapacitors have received much attention as large-scale energy storage devices for high power density and ultralong cycling life. In this work, sodium vanadate Na0.76V6O15/poly(3,4-ethylenedioxythiophene) (PEDOT) nanocables with deficient bridge oxygen at the interface (denoted Vo••-PNVO) have been tailored for supercapacitors through the in situ polymerization of 3,4-ethylenedioxythiophene and studied using three different electrolytes. Experiments and theoretical calculations reveal that all Na+, Zn2+, and Al3+ ions appear as hydrates in aqueous solutions but insert into the crystal structure as Na+ ions and Zn2+-H2O and Al3+-H2O hydrates, respectively. In comparison with the Zn2+-H2O and Al3+-H2O hydrates, Na+ ions with a smaller radius diffuse more quickly in Vo••-PNVO. Thus, Vo••-PNVO delivers better charge storage capability and stability when an electrolyte with Na+ ions is used. The results strongly suggest that an electrostatic interaction is significant in determining transport properties and storage capacities, rather than hydrate radii or valence states.
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Research context

Energy storagePolymersNanomaterials

OpenAlex topics: Supercapacitor Materials and Fabrication · Advanced battery technologies research · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Departments of Physics, College of Science, University of Shanghai for Science and Technology, Shanghai 200093, People’s Republic of China

Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, School of Physics Science and Engineering, Tongji University, Shanghai 200092, People’s Republic of China

Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195-2120, United States

Research Chair on Laser Diagnosis of Cancers, Department of Physics and Astronomy, College of Science, King Saud University, 11451 Riyadh, Saudi Arabia

Department of Physics and Astronomy, College of Science, King Saud University, 11451 Riyadh, Saudi Arabia

Funding

Ministry of Science and Technology of the People's Republic of China · King Saud University · Science and Technology Commission of Shanghai Municipality · National Natural Science Foundation of China · Shanghai Social Development Science and Technology Project

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