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Synthesis of Zn 2+ -Pre-Intercalated V 2 O 5 ·nH 2 O/rGO Composite with Boosted Electrochemical Properties for Aqueous Zn-Ion Batteries.
- Source :
- Molecules; Sep2022, Vol. 27 Issue 17, p5387, 11p
- Publication Year :
- 2022
-
Abstract
- Layered vanadium-based materials are considered to be great potential electrode materials for aqueous Zn-ion batteries (AZIBs). The improvement of the electrochemical properties of vanadium-based materials is a hot research topic but still a challenge. Herein, a composite of Zn-ion pre-intercalated V<subscript>2</subscript>O<subscript>5</subscript>·nH<subscript>2</subscript>O combined with reduced graphene oxide (ZnVOH/rGO) is synthesized by a facile hydrothermal method and it shows improved Zn-ion storage. ZnVOH/rGO delivers a capacity of 325 mAh·g<superscript>−1</superscript> at 0.1 A·g<superscript>−1</superscript>, and this value can still reach 210 mAh·g<superscript>−1</superscript> after 100 cycles. Additionally, it exhibits 196 mAh·g<superscript>−1</superscript> and keeps 161 mAh·g<superscript>−1</superscript> after 1200 cycles at 4 A·g<superscript>−1</superscript>. The achieved performances are much higher than that of ZnVOH and VOH. All results reveal that Zn<superscript>2+</superscript> as "pillars" expands the interlayer distance of VOH and facilitates the fast kinetics, and rGO improves the electron flow. They both stabilize the structure and enhance efficient Zn<superscript>2+</superscript> migration. All findings demonstrate ZnVOH/rGO's potential as a perspective cathode material for AZIBs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14203049
- Volume :
- 27
- Issue :
- 17
- Database :
- Complementary Index
- Journal :
- Molecules
- Publication Type :
- Academic Journal
- Accession number :
- 159032524
- Full Text :
- https://doi.org/10.3390/molecules27175387