Separator modification by MoxC/N-doped graphene enabling polysulfide catalytic conversion for high-performance Li–S batteries

Yang, Xiyun; Liu, Shiyuan; Chu, Fulu; Lei, Jie; Wu, Feixiang

doi:10.1016/j.mtener.2023.101318

Cited by 5 publications

(2 citation statements)

References 44 publications

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“…Recently, various electrocatalytic strategies (metal oxides 15 , 16 , sulfides 17 , selenides 18 , 19 , phosphides 20 , 21 and nitrides 22 ) have been proposed to combat the aforementioned issues, mainly pertaining to vacancy defects 23 – 25 , heteroatom doping 26 – 28 , and interface engineering 29 – 31 . Thereof, the introduction of over-weighted metal compounds inevitably degrades the overall energy density of the LSBs 32 , 33 .…”

Section: Introductionmentioning

confidence: 99%

Chlorine bridge bond-enabled binuclear copper complex for electrocatalyzing lithium–sulfur reactions

Yang,

Cai,

et al. 2024

Nat Commun

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Engineering atom-scale sites are crucial to the mitigation of polysulfide shuttle, promotion of sulfur redox, and regulation of lithium deposition in lithium–sulfur batteries. Herein, a homonuclear copper dual-atom catalyst with a proximal distance of 3.5 Å is developed for lithium–sulfur batteries, wherein two adjacent copper atoms are linked by a pair of symmetrical chlorine bridge bonds. Benefiting from the proximal copper atoms and their unique coordination, the copper dual-atom catalyst with the increased active interface concentration synchronously guide the evolutions of sulfur and lithium species. Such a delicate design breaks through the activity limitation of mononuclear metal center and represents a catalyst concept for lithium–sulfur battery realm. Therefore, a remarkable areal capacity of 7.8 mA h cm−2 is achieved under the scenario of sulfur content of 60 wt.%, mass loading of 7.7 mg cm−2 and electrolyte dosage of 4.8 μL mg−1.

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Section: Introductionmentioning

confidence: 99%

Chlorine bridge bond-enabled binuclear copper complex for electrocatalyzing lithium–sulfur reactions

Yang,

Cai,

et al. 2024

Nat Commun

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“…At present, surface modification of separators has been widely used to improve the performance of Li-S batteries. [17][18][19][20] It is noteworthy that the traditional polypropylene (PP) separator has the advantages of low cost, adjustable pore size porous with ion penetrate ability. Unfortunately, it not only cannot block the diffusion and shuttle of LiPSs well but also cannot promote the catalytic conversion of LiPSs, resulting in the poor stability and electrochemical properties of the battery.…”

Section: Introductionmentioning

confidence: 99%

Cobalt Nitride Nanoparticles Encapsulated in N‐Doped Carbon Nanotubes Modified Separator of Li–S Battery Achieving the Synergistic Effect of Restriction‐Adsorption‐Catalysis of Polysulfides

Jia,

Fan,

et al. 2024

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Although lithium–sulfur (Li–S) batteries have broad market prospects due to their high theoretical energy density and potential cost‐effectiveness, the practical applications still face serious shuttle effects of polysulfides (LiPSs) and slow redox reactions. Therefore, in this paper, cobalt nitride nanoparticles encapsulated in nitrogen‐doped carbon nanotube (CoN@NCNT) are prepared as a functional layer for the separator of high‐performance Li–S batteries. Carbon nanotubes with large specific surface areas not only promote the transport of ions and electrons but also weaken the migration of LiPSs and confine the dissolution of LiPSs in electrolytes. The lithiophilic heteroatom N adsorbs LiPSs by strong chemical adsorption, and the CoN particles with high catalytic activity greatly improve the kinetics of the conversion between LiPSs and Li2S2/Li2S during the charge–discharge process. Due to these advantages, the battery with CoN@NCNT modified separator has superior rate performance (initial discharge capacity of 834.7 mAh g−1 after activation at 1 C) and excellent cycle performance (capacity remains 729.7 mAh g−1 after 200 cycles at 0.2 C). This work proposes a strategy that can give the separator a strong ability to confinement‐adsorption‐catalysis of LiPSs in order to provide more possibilities for the development of Li–S batteries.

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Dual‐Functional Electrodes for High‐performance Lithium–Sulfur Cells

Geng,

Meng,

et al. 2023

Adv Funct Materials

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At present, the commercial application of Li─S cells is impeded by many challenging issues, especially the shuttle effect of dissolved lithium polysulfides (LiPSs) and severe dendritic growth. Applying a sole kind of host material owing dual functions, including inhibiting LiPSs dissolution/shuttling andguiding Li plating/stripping, has recently become a prospective solution. Currently, a systematic review of advanced dual‐functional electrodes aiming at the cathode and anode side simultaneously is scarce. Herein, this review points at such dual‐functional electrodes and summarizes the recent progress from the select host materials to designs. First, the rough challenges and ordinary solutions on the single side of the Li─S cell are illustrated. Then, the potentials of different materials to dual‐functional electrodes are discussed, such as carbon‐based materials, single‐atom catalysts (SACs), transition metal compounds (TMCs), heterostructure hybrids (HHs), and polymers. After that, the design methods for dual‐functional electrodes with high performance are explored and summarized by slurry‐coating and self‐supporting (electrospinning (ES), 3D printing (3DP), solvent method (SM), chemistry vapor deposition (CVD) and vacuum filtration (VF)). Besides, the possibility of applying the dual‐functional electrodes to other metal‐sulfur cells is discussed. Finally, design principles and prospects in dual‐functional electrodes for future research and commercial application are proposed as guidelines.

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Separator modification by MoxC/N-doped graphene enabling polysulfide catalytic conversion for high-performance Li–S batteries

Cited by 5 publications

References 44 publications

Chlorine bridge bond-enabled binuclear copper complex for electrocatalyzing lithium–sulfur reactions

Chlorine bridge bond-enabled binuclear copper complex for electrocatalyzing lithium–sulfur reactions

Cobalt Nitride Nanoparticles Encapsulated in N‐Doped Carbon Nanotubes Modified Separator of Li–S Battery Achieving the Synergistic Effect of Restriction‐Adsorption‐Catalysis of Polysulfides

Dual‐Functional Electrodes for High‐performance Lithium–Sulfur Cells

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