Numerical investigation of lithium-sulfur batteries by cyclic voltammetry

Mačák, Martin; Vyroubal, Petr; Kazda, Tomáš; Jaššo, Kamil

doi:10.1016/j.est.2019.101158

Cited by 21 publications

(5 citation statements)

References 35 publications

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“…Two prominent cathodic peaks at 2.30 and 2.02 V could be attributed to the reduction of sulfur to higher-order soluble lithium polysulfides (Li 2 S n , 4 ≤ n ≤ 8) and ultimately to insoluble Li 2 S/Li 2 S 2 , respectively. In the succeeding anodic scan, only one peak at about 2.46 V is observed, as a result of the oxidation of Li 2 S to lithium polysulfides [16,27,28]. During the first four cycles, there are no significant changes for both anodic and cathodic peaks, confirming the high reversibility and electrochemical stability of the cathode.…”

Section: Resultsmentioning

confidence: 77%

Confine sulfur in double-hollow carbon sphere integrated with carbon nanotubes for advanced lithium–sulfur batteries

Walle

Liu

2021

Mater Renew Sustain Energy

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The lithium–sulfur (Li–S) batteries are promising because of the high energy density, low cost, and natural abundance of sulfur material. Li–S batteries have suffered from severe capacity fading and poor cyclability, resulting in low sulfur utilization. Herein, S-DHCS/CNTs are synthesized by integration of a double-hollow carbon sphere (DHCS) with carbon nanotubes (CNTs), and the addition of sulfur in DHCS by melt impregnations. The proposed S-DHCS/CNTs can effectively confine sulfur and physically suppress the diffusion of polysulfides within the double-hollow structures. CNTs act as a conductive agent. S-DHCS/CNTs maintain the volume variations and accommodate high sulfur content 73 wt%. The designed S-DHCS/CNTs electrode with high sulfur loading (3.3 mg cm−2) and high areal capacity (5.6 mAh mg cm−2) shows a high initial specific capacity of 1709 mAh g−1 and maintains a reversible capacity of 730 mAh g−1 after 48 cycles at 0.2 C with high coulombic efficiency (100%). This work offers a fascinating strategy to design carbon-based material for high-performance lithium–sulfur batteries.

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Section: Resultsmentioning

confidence: 77%

Confine sulfur in double-hollow carbon sphere integrated with carbon nanotubes for advanced lithium–sulfur batteries

Walle

Liu

2021

Mater Renew Sustain Energy

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“…Strategies for lithium anode protection include construction of protective layers [33,34], lithium slats [35] and additives in the electrolyte [36,37]. Application of mentioned materials and methods to improve battery properties are often supported by theoretical work, and vice versa [38,39,40]. However, most of the research has been conducted on small laboratory set up, e.g.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the temperature and DOD effect on the performance-degradation behavior of lithium–sulfur pouch cells during calendar aging

et al. 2023

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“…Levillian et al ., also studied the half CV of Li 2 S 6 in liquid ammonia (NH 3 ) and they were the first to distinguish the peaks corresponding to the reductions of S 3 * − and S 6 2− which produce S 3 2− and S 6 3− , respectively [23] . Recently Mačák et al ., reported a numerical investigation of Li−S batteries using a cyclic voltammetry model in which the porous electrode is simplified to a single particle or a planar electrode [24] . However, this model utilizes a conventionally assumed reaction mechanism for simulating CVs.…”

Section: Introductionmentioning

confidence: 99%

“…[23] Recently Mačák et al, reported a numerical investigation of LiÀ S batteries using a cyclic voltammetry model in which the porous electrode is simplified to a single particle or a planar electrode. [24] However, this model utilizes a conventionally assumed reaction mechanism for simulating CVs.…”

Section: Introductionmentioning

confidence: 99%

Understanding the Reaction Steps Involving Polysulfides in 1 M LiTFSI in TEGDME : DOL Using Cyclic Voltammetry Experiments and Modelling

Thangavel

Mastouri

Guéry

et al. 2020

Batteries & Supercaps

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The reaction mechanisms of polysulfides in the electrolytes of lithium sulfur (Li−S) batteries are known to be complex. These reaction mechanisms may also change with the electrolyte used. Understanding the reaction steps of the polysulfides in a Li−S battery electrolyte is important to assess the underlying phenomena behind the Li−S cell performance limitations. Here, we investigate the reaction steps of polysulfides in electrolyte solutions containing S8, Li2S8 and Li2S6 in 1 M LiTFSI in TEGDME : DOL (v/v 1 : 1) (one of the most interesting electrolytes for use in Li−S batteries), using experimental cyclic voltammetry and a mathematical model. The mathematical model assists in understanding the reaction steps behind the characteristics changes of cyclic voltammograms (CVs) with the scan rate and polysulfides speciation. Our systematic study shows that the reaction steps conventionally used in Li−S battery models are not sufficient to simulate all the CV characteristics of the investigated electrolyte solutions.

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Numerical investigation of lithium-sulfur batteries by cyclic voltammetry

Cited by 21 publications

References 35 publications

Confine sulfur in double-hollow carbon sphere integrated with carbon nanotubes for advanced lithium–sulfur batteries

Confine sulfur in double-hollow carbon sphere integrated with carbon nanotubes for advanced lithium–sulfur batteries

Investigation of the temperature and DOD effect on the performance-degradation behavior of lithium–sulfur pouch cells during calendar aging

Understanding the Reaction Steps Involving Polysulfides in 1 M LiTFSI in TEGDME : DOL Using Cyclic Voltammetry Experiments and Modelling

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