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Regulation of nitrogen configurations and content in 3D porous carbons for improved lithium storage.
- Source :
-
Dalton Transactions: An International Journal of Inorganic Chemistry . 10/28/2021, Vol. 50 Issue 40, p14390-14399. 10p. - Publication Year :
- 2021
-
Abstract
- The incorporation of active nitrogen species in carbon materials has been widely demonstrated as a viable means to produce superior lithium storage materials, while the precise regulation of nitrogen configurations as well as their content still remains a formidable challenge. Herein, nitrogen-free porous carbon frameworks were synthesized by a self-templating strategy from disodium citrate, and post-annealing yielded 10.4 at% N that was primarily pyrrolic-N and pyridinic-N with an atomic ratio of about 3 : 1, with negligible inactive graphitic-N. A gravimetric capacity of 570 mA h g−1 at a current density of 4 A g−1 was measured for a Li half-cell based on the as-prepared N-doped 3D carbon materials. Lithium-ion capacitors with this N-doped carbon as the anode and commercial AC as the cathode yielded energy densities of 58.9 and 142.6 W h kg−1 with the corresponding power densities of 7400 and 185 W kg−1, respectively. We suggest that the carbon materials with high content of pyrrolic-N and pyridinic-N especially pyrrolic-N have improved lithium storage. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ACTIVE nitrogen
*NITROGEN
*LITHIUM ions
*POWER density
*ENERGY density
*CARBON
Subjects
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 50
- Issue :
- 40
- Database :
- Academic Search Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 153101360
- Full Text :
- https://doi.org/10.1039/d1dt02133h