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Electrochemical Properties of Sulfurized-Polyacrylonitrile Cathode for Lithium-Sulfur Batteries: Effect of Polyacrylic Acid Binder and Fluoroethylene Carbonate Additive

Title
Electrochemical Properties of Sulfurized-Polyacrylonitrile Cathode for Lithium-Sulfur Batteries: Effect of Polyacrylic Acid Binder and Fluoroethylene Carbonate Additive
Author
황장연
Keywords
LI-S BATTERIES; SOLID-ELECTROLYTE INTERPHASE; COMPOSITE CATHODE; ION BATTERY; IMPORTANT COMPONENT; PERFORMANCE; POLYSULFIDE; MECHANISM; CAPACITY; ANODES
Issue Date
2017-11
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY LETTERS, v. 8, no. 21, page. 5331-5337
Abstract
Sulfurized carbonized polyacrylonitrile (S-CPAN) is a promising cathode material for Li-S batteries owing to the absence of polysulfide dissolution phenomena in the electrolyte solutions and thus the lack of a detrimental shuttle mechanism. However, challenges remain in achieving high performance at practical loading because of large volume expansion of S-CPAN electrodes and lithium anode degradation at high current densities. To mitigate this problem, we propose a novel cell design including poly(acrylic acid) (PAA) binder for improved integrity of the composite electrodes and fluoroethylene carbonate (FEC) as additive in the electrolyte solutions for stabilizing the lithium metal surface. As a result, these cells delivered high initial discharge capacity of 1500 mAh g(-1) and a superior cycling stability similar to 98.5% capacity retention after 100 cycles, 0.5 C rate, and high sulfur loading of 3.0 mg cm(-3). Scaled-up 260 mAh pouch cells are working very well, highlighting the practical importance of this work.
URI
https://pubs.acs.org/doi/10.1021/acs.jpclett.7b02354http://repository.hanyang.ac.kr/handle/20.500.11754/116258
ISSN
1948-7185
DOI
10.1021/acs.jpclett.7b02354
Appears in Collections:
CENTER FOR CREATIVE CONVERGENCE EDUCATION[S](창의융합교육원) > ETC
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