Insight into Lithium–Sulfur Batteries with Novel Modified Separators: Recent Progress and Perspectives

Ponnada, Srikanth; Kiai, Maryam Sadat; Gorle, Demudu Babu; Rajagopal, Saravanakumar; Andra, Swetha; Nowduri, Annapurna; Kottaisamy, M.

doi:10.1021/acs.energyfuels.1c01509

Cited by 33 publications

(26 citation statements)

References 181 publications

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“…When discharged to 2.1 V, the two peaks at 161.5 and 163.2 eV are assigned to the S B and S T in the LiPSs, while the peak at 167.2 eV corresponds to the thiosulfate. [43][44][45] As the reduction process proceeds, the marginal peaks at 160.0 eV appear, corresponding to the formation of insoluble Li 2 S 2 and Li 2 S. At the same time, the ratio of the S T and S B peaks increases, indicating the reduction of long-chain LiPSs. Besides, a new peak appears at the higher position of 171.0 eV, which corresponds to the further reaction of thiosulfate to produce poly-thiosulfate.…”

Section: Electrocatalytic Mechanism Analysismentioning

confidence: 99%

Dynamic Liquid Metal Catalysts for Boosted Lithium Polysulfides Redox Reaction

Zhang

et al. 2022

Advanced Materials

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sluggish redox kinetics of soluble lithium polysulfides (LiPSs) transforming into solid discharge products Li 2 S leads to the undesirable accumulation and shuttling of LiPSs, resulting in low actual specific energy density, rapid capacity decay, and poor rate performance. [4][5][6] Therefore, enhancing the electrochemical reaction kinetics is the key to achieving the practical application of high specific energy Li-S batteries.To conquer this fatal challenge, the electrocatalytic strategy has been addressed to ameliorate the LiPSs redox kinetics. [7][8][9] So far, various electrocatalysts have been explored to improve the kinetics of LiPSs redox reaction process. It is worth noting that these electrocatalysts can be mainly divided into heterogeneous and homogeneous electrocatalysts in terms of their phase states. [10] The heterogeneous electrocatalysts, such as metals, metal compounds (e.g., metal oxides, sulfides, nitrides, etc.), heterostructures, single-atom catalysts, etc., have been applied to promote sulfur redox kinetics mainly by their strong anchoring effect and LiPSs transformation ability. [11][12][13] For example, Arava and his colleagues first introduced Pt and Ni to Li-S cells, which consciously promoted electrochemical performance and opened the era of metal-based electrocatalysts for Li-S batteries. [14] However, the heterogeneous electrocatalysts are restricted to specific catalytic sites and easily deactivated due to the undesirable coverage of solid sulfides, which cannot guarantee the long-term operation of batteries. Moreover, recently, homogeneous electrocatalysts, the extrinsic redox mediators (e.g., quinones, organopolysulfides, etc.), are introduced to regulate LiPSs reduction route through customized chemical reactions, while the practical application of this kind of electrocatalyst is impeded by its low chemical stability and possible shuttle effect. [15][16][17] The two electrocatalytic strategies mentioned above provide new perspectives to address the issue of LiPSs shuttling and encourage the exploration of novel electrocatalysts with high and long-term stable catalytic activity.Gallium-based liquid metal has become research hotspots in various physical and chemical fields due to their melting points below room temperature as well as high metallic conductivity, which have expedited the wide applications in soft electronics, robotics engineering, and catalysis technology. [18][19][20][21] On one hand, excitingly, the liquid property with abundant Designing efficient electrocatalysts with high electroconductivity, strong chemisorption, and superior catalytical efficiency to realize rapid kinetics of the lithium polysulfides (LiPSs) conversion process is crucial for practical lithium-sulfur (Li-S) battery applications. Unfortunately, most current electrocatalysts cannot maintain long-term stability due to the possible failure of catalytic sites. Herein, a novel dynamic electrocatalytic strategy with the liquid metal (i.e., gallium-tin, EGaSn) to facilitate LiPSs redox reaction is repor...

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Section: Electrocatalytic Mechanism Analysismentioning

confidence: 99%

Dynamic Liquid Metal Catalysts for Boosted Lithium Polysulfides Redox Reaction

Zhang

et al. 2022

Advanced Materials

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“…Li–S batteries (LSBs) are regarded as a next-generation energy storage system due to their higher specific energy and cost lower than LiBs. 171 The shuttle reaction originating from soluble polysulfide intermediates, combined with the insulating nature of sulphur and Li 2 S, and large volume expansion hinder their practical applications. A stable Li metal-based anode has been studied to tackle the above issues.…”

Section: Electrochemical Energy Applicationsmentioning

confidence: 99%

Metallic nanosponges for energy storage and conversion applications

et al. 2022

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“…In the process, the short-chain LiPSs in the liquid phase are further reduced to insoluble Li 2 S 2 and deposited on the electrode. 23 (5) The second electric potential slope corresponds to the solid−solid reaction in which the insoluble Li 2 S 2 are reduced to Li 2 S. 24 The phenomenon is because Li 2 S 2 and Li 2 S are insoluble in the electrolyte and can only obtain Li + through solid-ion conduction, and both of them have poor electrical conductivities. 25 Therefore, the reaction kinetics have been greatly hindered at this stage.…”

Section: Introductionmentioning

confidence: 99%

Overview of the Latest Developments and Perspectives about Noncarbon Sulfur Host Materials for High Performance Lithium–Sulfur Batteries

et al. 2022

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Lithium–sulfur (Li–S) batteries have attracted great attention in environmentally and friendly energy storage systems due to their excellent theoretical specific capacities and high energy densities. In addition, the element sulfur has a wide range of raw materials and low production costs and is considered to be a material with the most development potential. However, the poor electrical conductivity of sulfur, the volume expansion of sulfur during polarization, and the shuttle effect of lithium polysulfides (LiPSs) severely hinder the commercialization of Li–S batteries. Since carbon materials containing light nonpolar or weakly polar substances are used as sulfur hosts, there will be some difficulties in cycling stability, and the volumetric energy densities of Li–S batteries will be destroyed. In order to solve the existing problems, some polar substances are introduced into the cathode material to improve the cycle stability and effectively suppress the shuttle effect. This review presents polar materials commonly used in Li–S batteries, including single metals, metal nitrides, metal oxides, metal sulfides, and conducting polymers. Finally, this review not only summarizes the research directions and challenges of polar material applications but also looks forward to the development prospects of batteries, provides a pathway for the practical application of noncarbon sulfur host materials in Li–S batteries, and inspires more researchers to work on cathode materials.

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Insight into Lithium–Sulfur Batteries with Novel Modified Separators: Recent Progress and Perspectives

Cited by 33 publications

References 181 publications

Dynamic Liquid Metal Catalysts for Boosted Lithium Polysulfides Redox Reaction

Dynamic Liquid Metal Catalysts for Boosted Lithium Polysulfides Redox Reaction

Metallic nanosponges for energy storage and conversion applications

Overview of the Latest Developments and Perspectives about Noncarbon Sulfur Host Materials for High Performance Lithium–Sulfur Batteries

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