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Three-dimensional nanoporous tungsten supported tellurium cathode for Li-Te batteries.
- Source :
-
Journal of Alloys & Compounds . Apr2021, Vol. 861, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- Nanoporous tungsten (np-W) synthesized by a facile dealloying strategy was utilized as the host to accommodate tellurium (Te) for Li-Te batteries. The np-W supported Te (np-W-Te) cathode exhibits an excellent specific volumetric capacity of 1168 mA h cm−3 after 30 cycles, a good cycling performance of 200 cycles with a coulombic efficiency over 98.9%, and fast rate capabilities of 1612 mA h cm−3 at a current density of 50 mA g−1 and 774 mA h cm−3 at 800 mA g−1. The excellent performance of the np-W-Te cathode is attributed to the highly dispersed Te impregnated in the np-W host with rich porosity, high conductivity and superior stability. The mechanism investigation by in situ Raman and ex situ XRD techniques demonstrates the reversible transformation between Li and Li 2 Te during the charge/discharge processes. This study highlights the nanoporous metal as a promising host to confine Te for Li-Te batteries. Nanoporous tungsten synthesized by dealloying acted as the host to accommodate Te for Li-Te batteries. ga1 • The as-dealloyed nanoporous W hosted Te as the cathode for Li-Te batteries. • The cathode exhibited high specific capacity, good cycling and rate performances. • The reversible conversion between Te and Li 2 Te is the mechanism for the battery. [ABSTRACT FROM AUTHOR]
- Subjects :
- *TELLURIUM
*TUNGSTEN
*CATHODES
*STORAGE batteries
Subjects
Details
- Language :
- English
- ISSN :
- 09258388
- Volume :
- 861
- Database :
- Academic Search Index
- Journal :
- Journal of Alloys & Compounds
- Publication Type :
- Academic Journal
- Accession number :
- 148728905
- Full Text :
- https://doi.org/10.1016/j.jallcom.2020.158459