Harvesting polysulfides by sealing the sulfur electrode in a composite ion-selective net

Chen, Yazhou; Li, Zhong; Li, Xuekui; Zeng, Danli; Xu, Guodong; Zhang, Yunfeng; Sun, Yubao; Ke, Hanzhong; Cheng, Hansong

doi:10.1016/j.jpowsour.2017.09.064

Cited by 5 publications

(4 citation statements)

References 63 publications

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“…Conversely, the cycled Co@NC/S cathode almost retains its original morphology and exhibits a relatively smooth surface that only contains uniform solid precipitates with no obvious large aggregations. 39 As for the Li metal anode paired with the NC cathode (Figure 4f), it unveils a looser and rougher surface and many conspicuous cracks. In comparison, the cycled Li anode from the Co@NC/ S cell still maintains a roughly compact surface with few pores/ voids.…”

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confidence: 95%

“…From the post-mortem SEM image in Figure e, one can discern seriously passivated NC/S cathode with large agglomerations on the rough surface. Conversely, the cycled Co@NC/S cathode almost retains its original morphology and exhibits a relatively smooth surface that only contains uniform solid precipitates with no obvious large aggregations . As for the Li metal anode paired with the NC cathode (Figure f), it unveils a looser and rougher surface and many conspicuous cracks.…”

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confidence: 97%

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Manipulating Redox Kinetics of Sulfur Species Using Mott–Schottky Electrocatalysts for Advanced Lithium–Sulfur Batteries

et al. 2021

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Lithium–sulfur (Li–S) batteries suffer from sluggish sulfur redox reactions under high-sulfur-loading and lean-electrolyte conditions. Herein, a typical Co@NC heterostructure composed of Co nanoparticles and a semiconductive N-doped carbon matrix is designed as a model Mott–Schottky catalyst to exert the electrocatalytic effect on sulfur electrochemistry. Theoretical and experimental results reveal the redistribution of charge and a built-in electric field at the Co@NC heterointerface, which are critical to lowering the energy barrier of polysulfide reduction and Li2S oxidation in the discharge and charge process, respectively. With Co@NC Mott–Schottky catalysts, the Li–S batteries display an ultrahigh capacity retention of 92.1% and a system-level gravimetric energy density of 307.8 Wh kg–1 under high S loading (10.73 mg cm–2) and lean electrolyte (E/S = 5.9 μL mgsulfur –1) conditions. The proposed Mott–Schottky heterostructure not only deepens the understanding of the electrocatalytic effect in Li–S chemistry but also inspires a rational catalyst design for advanced high-energy-density batteries.

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confidence: 95%

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confidence: 97%

Manipulating Redox Kinetics of Sulfur Species Using Mott–Schottky Electrocatalysts for Advanced Lithium–Sulfur Batteries

et al. 2021

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“…The dimensional thermal stability of the PEs or separator was one of the important factors that determine the safety of the LIBs. 38 Fig. 2a shows the optical photos of the dimensional thermal stability of single-sided ceramic PE, double-sided ceramic PE, PVDF-HFP and PI-SIPE.…”

Section: Physical Properties Of Pi-licpsimentioning

confidence: 99%

A single-ion gel polymer electrolyte based on polyimide grafted with lithium 3-chloropropanesulfonyl (trifluoromethanesulfonyl) imide for high performance lithium ion batteries

Liu

Liang

et al. 2023

J. Mater. Chem. A

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“…The method is illustrated here for the case of a lithiated Nafion membrane and its capability to block the transport of iodide ions. Nafion membranes have been successfully used in Li−S cells to block transport of polysulfide species ,,. Iodide has a well‐defined redox behaviour and it is used here as a model for polysulfide redox species, which will be studied in further work.…”

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confidence: 99%

Operando Evaluation of Selectivity and Transference Number of Lithium‐Conductive Membranes

2019

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What prompted you to investigate this topic?Preventing unwanted movement of species between the positive and negative electrodes is ak ey requirement for next generation lithium batteries, and can be achievedu sing protective membranes, but these are typically evaluated in ex situ conditions which are not representative of battery operation. We wanted to develop am ethodf or quantifying the ability of membranes to block crossover under operando conditions. What is the most significant result of this study?Most significant is that ex situ methods can considerably overestimate the ability of membranes to block crossover, which has important implicationsf or battery performance andl ifetime. The operando method developed in this study provides am ore realistic picture, and is also low-cost and easy to apply, so can be used in future by scientists developing new membranestoevaluate their performance quickly and accurately.What was the biggest surprise?The biggestsurprise was how wellthe simple model presented in the study describest he system,a llowing very easy analysis of the data.Invited for this month'sc over picture is the group of Dr.N uria Garcia-Araez from the University of Southampton (UK). The cover illustrates the key features of an ew method to evaluate membrane selectivity undero perandoc onditions. Read the full text of the

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Harvesting polysulfides by sealing the sulfur electrode in a composite ion-selective net

Cited by 5 publications

References 63 publications

Manipulating Redox Kinetics of Sulfur Species Using Mott–Schottky Electrocatalysts for Advanced Lithium–Sulfur Batteries

Manipulating Redox Kinetics of Sulfur Species Using Mott–Schottky Electrocatalysts for Advanced Lithium–Sulfur Batteries

A single-ion gel polymer electrolyte based on polyimide grafted with lithium 3-chloropropanesulfonyl (trifluoromethanesulfonyl) imide for high performance lithium ion batteries

Operando Evaluation of Selectivity and Transference Number of Lithium‐Conductive Membranes

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