Back to Search
Start Over
Sandwiched graphene inserted with graphene-encapsulated yolk–shell γ-Fe2O3 nanoparticles for efficient lithium ion storage.
- Source :
- Journal of Materials Chemistry A; 4/21/2017, Vol. 5 Issue 15, p7035-7042, 8p
- Publication Year :
- 2017
-
Abstract
- A convenient and scalable in situ chemical vapor deposition (CVD) method is developed for one-step fabrication of sandwiched graphene sheets which were filled with yolk–shell γ-Fe<subscript>2</subscript>O<subscript>3</subscript> nanoparticles encapsulated with graphene shells (YS-γ-Fe<subscript>2</subscript>O<subscript>3</subscript>@G-GS). Such a unique architecture can be applied to produce an excellent lithium ion battery (LIB) anode. As a result, long-term cycling stability at high rates (a high capacity of 663.7 mA h g<superscript>−1</superscript> is achieved at 2 A g<superscript>−1</superscript> and maintained at approximately 96.6% even after 1500 cycles) and superior rate capability (1173 mA h g<superscript>−1</superscript> at 0.1C, 989 mA h g<superscript>−1</superscript> at 0.2C, 827 mA h g<superscript>−1</superscript> at 0.5C, 737 mA h g<superscript>−1</superscript> at 1C, 574 mA h g<superscript>−1</superscript> at 2C, 443 mA h g<superscript>−1</superscript> at 5C, and 350 mA h g<superscript>−1</superscript> at 10C; 1C = 1 A g<superscript>−1</superscript>) can be obtained when YS-γ-Fe<subscript>2</subscript>O<subscript>3</subscript>@G-GS is used as an LIB anode. As far as we know, this is the best rate capacity and longest cycle life ever reported for an Fe<subscript>2</subscript>O<subscript>3</subscript>-based LIB anode. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 5
- Issue :
- 15
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 122434775
- Full Text :
- https://doi.org/10.1039/c7ta01239j