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Cost-Effective Water-Soluble Poly(vinyl alcohol) as a Functional Binder for High-Sulfur-Loading Cathodes in Lithium-Sulfur Batteries.

Author(s): Liao J, Liu Z, Wang J, Ye Z

ACS Omega. 2020 Apr 14;5(14):8272-8282 Authors: Liao J, Liu Z, Wang J, Ye Z

Article GUID: 32309738
Preservation of organic matter in marine sediments by inner-sphere interactions with reactive iron.

Author(s): Barber A, Brandes J, Leri A, Lalonde K, Balind K, Wirick S, Wang J, Gélinas Y

Sci Rep. 2017 03 23;7(1):366 Authors: Barber A, Brandes J, Leri A, Lalonde K, Balind K, Wirick S, Wang J, Gélinas Y

Article GUID: 28336935
Title:Cost-Effective Water-Soluble Poly(vinyl alcohol) as a Functional Binder for High-Sulfur-Loading Cathodes in Lithium-Sulfur Batteries.
Authors:Liao J,  Liu Z,  Wang J,  Ye Z
Link:https://www.ncbi.nlm.nih.gov/pubmed/32309738?dopt=Abstract
DOI:10.1021/acsomega.0c00666
Category:ACS Omega
PMID:32309738
Dept Affiliation: ENCS
1 Bharti School of Engineering, Laurentian University, Sudbury, Ontario P3E 2C6, Canada.
2 State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
3 College of Chemical Engineering, Zhejiang University of Technology, 18 Chaowang Road, Hangzhou 310014, China.
4 Department of Chemical and Materials Engineering, Concordia University, Montreal, Quebec H3G 1M8, Canada.

Description:

Cost-Effective Water-Soluble Poly(vinyl alcohol) as a Functional Binder for High-Sulfur-Loading Cathodes in Lithium-Sulfur Batteries.

ACS Omega. 2020 Apr 14;5(14):8272-8282

Authors: Liao J, Liu Z, Wang J, Ye Z

Abstract

Binder, as one of the key components, plays a crucial role in improving the capacity and cycling performance of lithium-sulfur (Li-S) batteries. In this work, commercially available, low-cost, water-soluble polyvinyl alcohol (PVA) has been systematically investigated as a functional polymer binder for high-sulfur-loading cathodes, with the aim of enhancing sulfur utilization, reducing capacity decay, and extending cycling life of the cathodes. In comparison with polyvinylidene fluoride as a conventional binder, PVA shows a valuable polysulfide entrapping ability and a much stronger binding strength. Its superior polysulfide entrapping ability has been verified through theoretical density functional theory calculations and an experimental ex situ adsorption study. In electrochemical Li-S battery performance evaluation, at a sulfur loading density of 3.5 mg cm-2, the sulfur cathode assembled with the PVA binder displays at 0.5 C a very slow capacity decay of only 0.010% per cycle over 250 cycles. Additionally, the strong binding strength of PVA allows the fabrication of thick sulfur cathodes with a high sulfur loading density of 10.5 mg cm-2, which shows a high areal capacity of 4.0 mA h cm-2 and a high cycling stability (capacity decay of 0.1% per cycle). In consideration of the superior capacity retention and cycling performance of its enabled cathodes, the cost-effective PVA is a promising candidate for high-sulfur-loading cathodes in practical applications.

PMID: 32309738 [PubMed]