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FeSe2 micro-nanorods confined in N-doped carbon as an advanced anode for fast sodium ion storage.
- Source :
- Journal of Materials Chemistry A; 5/14/2024, Vol. 12 Issue 18, p11028-11037, 10p
- Publication Year :
- 2024
-
Abstract
- Metal selenides have aroused significant attention in the realm of efficient ion storage attributed to their exceptional chemical and physical properties, whereas their utilization in sodium-ion batteries (SIBs) is hindered by poor rate performance and cycle stability that originated from their substantial volume expansion throughout Na<superscript>+</superscript> insertion/extraction procedures. This work proposes a productive approach to preserve the structure of the FeSe<subscript>2</subscript> anode via in situ coating nitrogen-doped carbon (NC). The powerful interfacial interaction between FeSe<subscript>2</subscript> micro-nanorods and NC facilitates fast Na<superscript>+</superscript>/e<superscript>−</superscript> transport kinetics and ensures excellent structural stability of FeSe<subscript>2</subscript>@NC. Consequently, FeSe<subscript>2</subscript>@NC exhibits a capacity of 379.2 mA h g<superscript>−1</superscript> at a high current density of 10 A g<superscript>−1</superscript> and up to 100% reversible capacity over 1000 cycles at 5 A g<superscript>−1</superscript>. Furthermore, the invertible Na<superscript>+</superscript> storage mechanism of FeSe<subscript>2</subscript>@NC is investigated by ex situ methods. When FeSe<subscript>2</subscript>@NC is used as the anode and Na<subscript>3</subscript>V<subscript>2</subscript>(PO<subscript>4</subscript>)<subscript>2</subscript>F<subscript>3</subscript>@reduced graphene oxide is used as the cathode to assemble a full battery, it also exhibits a capacity of 167.2 mA h g<superscript>−1</superscript> even after 1000 cycles at 1 A g<superscript>−1</superscript>. These exemplary results underscore the potential application value of FeSe<subscript>2</subscript>@NC in fast-charging SIBs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 12
- Issue :
- 18
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 177090735
- Full Text :
- https://doi.org/10.1039/d4ta00097h