In:
ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2020-02, No. 68 ( 2020-11-23), p. 3477-3477
Abstract:
As the size and usage of electronics are diversified, demand for secondary batteries with higher capacity and performance is increasing. Lithium-sulfur(Li-S) battery is one of the promising next generation battery due to high theoretical capacity(1,672 mAh/g), natural abundance and environmental nontoxic compare to conventional active materials of lithium-ion batteries. However, lithium polysulfide(PS) dissolution issue which causes capacity fade inevitably must be overcome for commercialization. In this study, we introduced first transition metal oxalates as cathode additives which have a high polar surface area to enlarge the electrocatalytic interfacial boundary enabling LiPS redox reactions to occur, by controlling the carbon and metal oxalates ratio. Furthermore, physicochemical interactions between LiPS and metal oxalates were verified by UV-vis, X-ray Photoelectron Spectroscopy and Electrochemical Analysis(Cyclic Voltammetry, Galvanostatic Intermittent Titration Technique, Electrochemical Impedance Spectroscopy). As a result, the modified cathode by the best candidate effectively decreased cell overpotential and improved the cycle stability by maximized electrochemical utilization Figure 1
Type of Medium:
Online Resource
ISSN:
2151-2043
DOI:
10.1149/MA2020-02683477mtgabs
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2020
detail.hit.zdb_id:
2438749-6
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