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Significant enhancement of the cycling performance and rate capability of the P/C composite via chemical bonding (P–C).
- Source :
- Journal of Materials Chemistry A; 1/14/2016, Vol. 4 Issue 2, p505-511, 7p
- Publication Year :
- 2016
-
Abstract
- Among anode materials for sodium ion batteries, red phosphorus is a very promising one due to its abundant reserves, low-cost and high theoretical capacity of 2600 mA h g<superscript>−1</superscript>. However, its huge volume expansion on sodiation (∼490%) and poor conductivity leads to dramatic capacity decay, restraining its practical application. To improve the electrochemical performance, here, we prepared a red phosphorus and graphene nanoplate composite using cheap red P and natural graphite as the starting materials via a simple and scalable ball-milling method. The phosphorus–carbon bond formed during the milling process improves the electrical connectivity between P particles and graphene nanoplates, consequently stabilizing the structure of the composite to achieve high cycling performance and rate capability. As a result, the red phosphorus and graphene nanoplate composite delivered a high reversible capacity of 1146 mA h g<superscript>−1</superscript> (calculated on the basis of the composite mass) at a current density of 100 mA g<superscript>−1</superscript> and an excellent cycling stability of 200 cycles with 92.5% capacity retention. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 4
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 111924560
- Full Text :
- https://doi.org/10.1039/c5ta08590j