Ultrathin Conductive Interlayer with High‐Density Antisite Defects for Advanced Lithium–Sulfur Batteries

He, Deyan; Meng, Jintao; Chen, Xinyu; Liao, Yaqi; Cheng, Zexiao; Yuan, Lixia; Li, Zhen; Huang, Yunhui

doi:10.1002/adfm.202001201

Cited by 45 publications

(26 citation statements)

References 66 publications

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“…[104][105][106] Recently, vacancy engineering has stimulated an immerse interest in boosting the chemical entrapment and catalytic conversion of PS in Li-S system. [107][108][109][110] In this section, the fabrication and characterization of vacancy are introduced, followed by the discussion on the essential role of vacancy played in accelerating Li-S chemistry from experimental analysis and theoretical simulation. The optimized electronic structure via vacancy engineering is also covered to better understand the sulfur redox chemistry at an atomic scale.…”

Section: Vacancymentioning

confidence: 99%

Defect Engineering for Expediting Li–S Chemistry: Strategies, Mechanisms, and Perspectives

Shi

Sun

et al. 2021

Advanced Energy Materials

171

153

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as well as the cost-effectiveness and environmental-friendliness of sulfur resource. [1][2][3][4][5][6][7][8] However, a suite of troublesome problems, mainly pertaining to sluggish redox kinetics and severe polysulfide (PS) shuttle, has hampered the pathway for pursuing Li-S commercialization. [9][10][11][12][13] For one thing, the conversion from PS to Li 2 S exhibits large energy barriers, which is regarded as the rate-determining step of sulfur reduction reaction (SRR) process. For another, Li 2 S is prone to accumulating at the cathode side, which is not easy to be efficiently dissociated.Recent years have witnessed a burgeoning interest in designing adsorptive and electrocatalytic mediators for effective PS management in Li-S realm, in order to essentially expedite redox kinetics and inhibit "shuttle effect." [14][15][16][17][18][19][20] Although strenuous efforts have been devoted to exploring various types of PS mediators including carbonaceous materials, [21][22][23][24][25] metal oxides/carbides/nitrides/borides/ sulfides/selenides/phosphides, [26][27][28][29][30][31][32][33][34][35][36] and heterostructures, [37][38][39][40][41][42][43][44] their unsatisfactory adsorptive and catalytic behavior caused by insufficient active sites remains a huge barrier for obtaining favorable Li-S chemistry. To circumvent this problem, adjusting the morphology of PS mediators such as reducing their size to nanoscale has been recognized as a promising method to expose more active lattice planes and edge sites. Indeed, a myriad of PS mediators possessing ultrafine nanoparticle and ultrathin nanosheet architecture has been developed to efficiently adsorb sulfur species and catalyze PS conversion. [45][46][47][48][49] Furthermore, optimizing the electronic structure of PS mediator also serves as an appealing approach to boost electrochemical activities. [50][51][52][53][54] Defect engineering, an essential strategy to tailor the atomic distribution and dictate the surface property of nanomaterials, [55][56][57][58][59][60] plays a pivotal role in optimizing the electronic structure and promoting the electrochemical performance of catalysts in various scenarios including hydrogen evolution reaction (HER), oxygen evolution reaction (OER), oxygen reduction reaction (ORR), carbon dioxide reduction reaction (CO 2 RR), and nitrogen reduction reaction (NRR). [61][62][63][64][65][66][67][68][69][70][71][72] Very recently, defect engineering has stimulated a growing attention on PS mediator design in Li-S realm. Benefiting from a collection of compelling functionalities, defective mediator showcases remarkable promise in regulating PS behavior and realizing fast redox chemistry, thereby paving an innovative way toward practical applications of Li-S batteries.Lithium-sulfur (Li-S) batteries have stimulated a burgeoning scientific and industrial interest owing to high energy density and low materials costs. The favorable reaction kinetics of sulfur species is a key prerequisite for pursuing their commercialization. Recent years have ...

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Section: Vacancymentioning

confidence: 99%

Defect Engineering for Expediting Li–S Chemistry: Strategies, Mechanisms, and Perspectives

Shi

Sun

et al. 2021

Advanced Energy Materials

171

153

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“…Nevertheless, this catalytic universality of chalcogens vacancies has not been witnessed. Recent works manifested that Se vacancies [ 251 ] and Te vacancies [ 252 ] were also contributed to the LiPSs conversion, and it is anticipated to know if those vacancies located on the surfaces of 1T phase TMDs (such as MoSe 2 and MoTe 2 ) are also effective. Since these vacancies could be easily obtained through external irradiation methods and it would be delighted to realize their twofold goals: stabilizing metallic VIB TMDs and accelerating LiPSs redox processes.…”

Section: Energy Applicationsmentioning

confidence: 99%

Metallic Transition Metal Dichalcogenides of Group VIB: Preparation, Stabilization, and Energy Applications

Wang

et al. 2021

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Layered transition metal dichalcogenides (TMDs) of group VIB have been widely used in the realms of energy storage and conversions. Along with the existence of semiconducting states, their metallic phases have recently attracted numerous attentions owing to their fascinating physical and chemical properties. Many efforts have been devoted to obtain metallic TMDs with high purity and yield. Nevertheless, such metallic phase is thermodynamically metastable and tends to convert into semiconducting phase, which necessitates the exploration over effective strategies to ensure the stability. In this review, typical fabrication routes are introduced and those critical factors during preparation are elaborately discussed. Moreover, the stabilized strategies are summarized with concrete examples highlighting the key mechanisms toward efficient stabilization. Finally, emerging energy applications are overviewed. This review presents comprehensive research status of metallic group VIB TMDs, aiming to facilitate further scientific investigations and promote future practical applications in the fields of energy storage and conversion.

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“…[19,20] To date, a variety of modified materials, including polymer, free-standing GO/CNT bilayer membrane, NbN/ NG, and Bi 2 Te 2.7 Se 0.3 interlayers have been explored to equip the separator to retard LiPS shuttling and improve interfacial charge transfer kinetics. [21][22][23][24][25] However, most of these modified layers just acted as blocking wall, leading to low Li ion conductivity and poor rate capability. For example, 2D materials have attracted considerable enthusiasm owing to their large surface area with exposed active sites, feasible process with conventional separators and enriched functionality.…”

Section: Introductionmentioning

confidence: 99%

Porosity Engineering of MXene Membrane towards Polysulfide Inhibition and Fast Lithium Ion Transportation for Lithium–Sulfur Batteries

Xiong

Huang

Fang

et al. 2021

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Detrimental lithium polysulfide (LiPS) shuttle effects and sluggish electrochemical conversion kinetics in lithium-sulfur (Li-S) batteries severely hinder their practical application. Separator modification has been extensively investigated as an effective strategy to address above issues. Nevertheless, in the case of functional separators, how to effectively block the LiPSs from diffusion while enabling the rapid Li ion transport remains a challenge. Herein, by using an "oxidation-etching" method, MXene membranes are presented with controllable in-plane pores as interlayer to regulate Li ion transportation and LiPS immobilization. Porous MXene membranes with optimized pore density and size can simultaneously anchor LiPS and ensure fast Li ion diffusion. Consequently, even with pure sulfur cathode, the improved Li-S batteries deliver excellent rate performance up to 2 C with a reversible capacity of 677.6 mAh g −1 and long-term cyclability over 500 cycles at 1 C with a low capacity decay of 0.07% per cycle. This work sheds new insights into the design of high-performance interlayers with manipulated nanochannels and tailored surface chemistry to regulate LiPSs trapping and Li ion diffusion in Li-S batteries.

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Ultrathin Conductive Interlayer with High‐Density Antisite Defects for Advanced Lithium–Sulfur Batteries

Cited by 45 publications

References 66 publications

Defect Engineering for Expediting Li–S Chemistry: Strategies, Mechanisms, and Perspectives

Defect Engineering for Expediting Li–S Chemistry: Strategies, Mechanisms, and Perspectives

Metallic Transition Metal Dichalcogenides of Group VIB: Preparation, Stabilization, and Energy Applications

Porosity Engineering of MXene Membrane towards Polysulfide Inhibition and Fast Lithium Ion Transportation for Lithium–Sulfur Batteries

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