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A New Salt-Baked Approach for Confining Selenium in Metal Complex-Derived Porous Carbon with Superior Lithium Storage Properties.
- Source :
- Advanced Functional Materials; Aug2015, Vol. 25 Issue 32, p5229-5238, 10p
- Publication Year :
- 2015
-
Abstract
- For lithium-selenium batteries, commercial applications are hindered by the inferior electrical conductivity of selenium and the low utilization ratio of the active selenium. Here, we report a new baked-in-salt approach to enable Se to better infiltrate into metal-complex-derived porous carbon (Se/MnMC-B). The approach uses the confined, narrow space that is sandwiched between two compact NaCl solid disks, thus avoiding the need for protection with argon or a vacuum environment during processing. The electrochemical properties for both lithium and sodium storage of our Se/MnMC-B cathode were found to be outstanding. For lithium storage, the Se/MnMC-B cathode (with 72% selenium loading) exhibited a capacity of 580 mA h g<superscript>−1</superscript> after 1000 cycles at 1 C, and an excellent rate capability was achieved at 20 C and 510 mA h g<superscript>−1</superscript>. For sodium storage, a specific capacity of 535 mA h g<superscript>−1</superscript> was achieved at 0.1 C after 150 cycles. These results demonstrate the potential of this approach as a new effective general synthesis method for confining other low melting point materials into a porous carbon matrix. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 1616301X
- Volume :
- 25
- Issue :
- 32
- Database :
- Complementary Index
- Journal :
- Advanced Functional Materials
- Publication Type :
- Academic Journal
- Accession number :
- 109078028
- Full Text :
- https://doi.org/10.1002/adfm.201501956