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- Title
Preventing the Dissolution of Lithium Polysulfides in Lithium-Sulfur Cells by using Nafion-coated Cathodes.
- Authors
Oh, Soo Jung; Lee, Jun Kyu; Yoon, Woo Young
- Abstract
The principal drawback of lithium-sulfur batteries is the dissolution of long-chain lithium polysulfides into the electrolyte, which limits cycling performance. To overcome this problem, we focused on the development of a novel cathode as well as anode material and designed Nafion-coated NiCrAl/S as a cathode and lithium powder as an anode. Nafion-coated NiCrAl/S cathode was synthesized using a two-step dip-coating technique. The lithium-powder anode was used instead of a lithium- foil anode to prohibit dendrite growth and to improve on the electrochemical behaviors. The cells showed an initial discharge capacity of about 900 mAg-1 and a final discharge capacity of 772 mAg-1 after 100 cycles at 0.1 C-rate. Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) demonstrate that using the Nafion-coated NiCrAl/S cathode can suppress the dissolution of long-chain lithium polysulfides.
- Subjects
LITHIUM sulfur batteries; POLYSULFIDES; SULFIDES; ELECTRIC batteries research; NAFION; CATHODES
- Publication
ChemSusChem, 2014, Vol 7, Issue 9, p2562
- ISSN
1864-5631
- Publication type
Article
- DOI
10.1002/cssc.201402318