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Two-Dimensional Nb-Based M4C3 Solid Solutions (MXenes).
- Source :
- Journal of the American Ceramic Society; Feb2016, Vol. 99 Issue 2, p660-666, 7p
- Publication Year :
- 2016
-
Abstract
- Herein, two new two-dimensional Nb<subscript>4</subscript>C<subscript>3</subscript>-based solid solutions (MXenes), (Nb<subscript>0.8</subscript>,Ti<subscript>0.2</subscript>)<subscript>4</subscript>C<subscript>3</subscript>T<subscript> x</subscript> and (Nb<subscript>0.8</subscript>,Zr<subscript>0.2</subscript>)<subscript>4</subscript>C<subscript>3</subscript>T<subscript> x</subscript> (where T is a surface termination) were synthesized-as confirmed by X-ray diffraction-from their corresponding MAX phase precursors (Nb<subscript>0.8</subscript>,Ti<subscript>0.2</subscript>)<subscript>4</subscript>AlC<subscript>3</subscript> and (Nb<subscript>0.8</subscript>,Zr<subscript>0.2</subscript>)<subscript>4</subscript>AlC<subscript>3</subscript>. This is the first report on a Zr-containing MXene. Intercalation of Li ions into these two compositions, and Nb<subscript>4</subscript>C<subscript>3</subscript>T<subscript> x</subscript> was studied to determine the potential of those materials for energy storage applications. Lithiation and delithiation peaks at 2.26 and 2.35 V, respectively, appeared in the case of Nb<subscript>4</subscript>C<subscript>3</subscript>T<subscript> x</subscript>, but were not present in Nb<subscript>2</subscript>CT<subscript> x</subscript>. After 20 cycles at a rate of C/4, the specific capacities of (Nb<subscript>0.8</subscript>,Ti<subscript>0.2</subscript>)<subscript>4</subscript>C<subscript>3</subscript>T<subscript> x</subscript> and (Nb<subscript>0.8</subscript>,Zr<subscript>0.2</subscript>)<subscript>4</subscript>C<subscript>3</subscript>T<subscript> x</subscript> were 158 and 132 mAh/g, respectively, both slightly lower than the capacity of Nb<subscript>4</subscript>C<subscript>3</subscript>T<subscript> x</subscript>. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00027820
- Volume :
- 99
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Journal of the American Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 112684788
- Full Text :
- https://doi.org/10.1111/jace.13922