Improving poisoning resistance of electrocatalysts via alloying strategy for high-performance lithium-sulfur batteries

Song, Xue‐Qin; Tian, Da; Qiu, Yue; Sun, Xun; Jiang, Bo; Zhao, Chenghao; Zhang, Yu; Fan, Longlong; Zhang, Naiqing

doi:10.1016/j.ensm.2021.05.028

Cited by 67 publications

(54 citation statements)

References 33 publications

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“…[ 7 ] However, most metal oxides are greatly hindered in their further application due to their poor electron/ion transfer and low catalytic activity. To further enhance the Li–S kinetics on metal oxides sulfur immobilizer, many structure design strategies, such as sulfurization, [ 8 ] nitridation, [ 9 ] phosphidation, [ 10 ] telluridation, [ 11 ] and heterostructure construction [ 12 ] have been employed to develop sulfur electrocatalyst for enhanced catalytic conversion of LiPs. However, these methods involve complicated procedures to modify metal oxides and the as‐developed catalysts usually demonstrate unsatisfied durability, which tends to react with LiPs or aggregate over the course of electrochemical process, which significantly reduce the catalytic activity of active sites, rendering sluggish redox reactions.…”

Section: Introductionmentioning

confidence: 99%

Design of Quasi‐MOF Nanospheres as a Dynamic Electrocatalyst toward Accelerated Sulfur Reduction Reaction for High‐Performance Lithium–Sulfur Batteries

Luo

Zhang

et al. 2021

Advanced Materials

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Lithium–sulfur (Li–S) batteries are considered as one of the most promising next‐generation rechargeable batteries owing to their high energy density and cost‐effectiveness. However, the sluggish kinetics of the sulfur reduction reaction process, which is so far insufficiently explored, still impedes its practical application. Metal–organic frameworks (MOFs) are widely investigated as a sulfur immobilizer, but the interactions and catalytic activity of lithium polysulfides (LiPs) on metal nodes are weak due to the presence of organic ligands. Herein, a strategy to design quasi‐MOF nanospheres, which contain a transition‐state structure between the MOF and the metal oxide via controlled ligand exchange strategy, to serve as sulfur electrocatalyst, is presented. The quasi‐MOF not only inherits the porous structure of the MOF, but also exposes abundant metal nodes to act as active sites, rendering strong LiPs absorbability. The reversible deligandation/ligandation of the quasi‐MOF and its impact on the durability of the catalyst over the course of the electrochemical process is acknowledged, which confers a remarkable catalytic activity. Attributed to these structural advantages, the quasi‐MOF delivers a decent discharge capacity and low capacity‐fading rate over long‐term cycling. This work not only offers insight into the rational design of quasi‐MOF‐based composites but also provides guidance for application in Li–S batteries.

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Section: Introductionmentioning

confidence: 99%

Design of Quasi‐MOF Nanospheres as a Dynamic Electrocatalyst toward Accelerated Sulfur Reduction Reaction for High‐Performance Lithium–Sulfur Batteries

Luo

Zhang

et al. 2021

Advanced Materials

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“…Meanwhile, a peak shift of Li 1s signal for Li 2 S 4 is also observed after contact with Bi 2 Te 3 , which can be attributed to the formation of Te–Li interaction. [ 45 ] These results reveal that Bi 2 Te 3 can anchor LiPSs through dual lithiophilic and sulfiphilic interactions.…”

Section: Resultsmentioning

confidence: 93%

Accelerating Sulfur Redox Reactions by Topological Insulator Bi₂Te₃ for High‐Performance Li‐S Batteries

Song

Tian

Qiu

et al. 2021

Adv Funct Materials

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Polysulfide shuttling and sluggish sulfur redox kinetics hinder the cyclability and rate capability of lithium‐sulfur (Li‐S) batteries. Accelerating sulfur redox reactions is considered a promising way toward the capture and utilization of soluble sulfur species. Herein, topological insulator (TI) Bi2Te3 is reported as an electrocatalyst for accelerated sulfur electrochemistry. The findings indicate that Bi2Te3 can effectively anchor soluble sulfur species and form seamless electron transport pathways with the adsorbed polysulfides. Both the sulfur reduction reactions and the reverse processes are found to be boosted by Bi2Te3. The incorporation of Bi2Te3 enables efficient operation of Li‐S batteries in terms of impressive rate capability of 857 mAh g−1 at 3 C and very low capacity decay of 0.033% per cycle over 1000 cycles. This work extends the application of TI to the field of Li‐S electrochemistry and may inspire further explorations.

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“…In general, the strong anodic peak at about 2.3–2.4 V is related to the conversion of short‐chain Li 2 S 2 /Li 2 S to long‐chain polysulfides and elemental sulfur. [ 23,43 ] Two cathodic peaks (≈2.35 and ≈2.05 V) are attributed to the reduction of sulfur to long‐chain polysulfides and subsequent formation of Li 2 S 2 /Li 2 S. [ 3,37 ] As shown in Figure a, all CV curves showed typical redox peaks for Li–S batteries and no additional peaks appeared, indicating that none of the three samples obstructed normal polysulfide reactions. The CoNiO 2 /Co 4 N exhibited the lowest anode potential and the highest cathode potential, and the voltage polarization was as low as 0.263 V. Even the CoNiO 2 –G–S electrode with highest polarization showed less polarization than pure graphene without any additives (Figure S10, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

CoNiO₂/Co₄N Heterostructure Nanowires Assisted Polysulfide Reaction Kinetics for Improved Lithium–Sulfur Batteries

Pu¹,

Gong

Shen³

et al. 2021

Advanced Science

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The "shuttle effect" of soluble polysulfides and slow reaction kinetics hinder the practical application of Li-S batteries. Transition metal oxides are promising mediators to alleviate these problems, but the poor electrical conductivity limits their further development. Herein, the homogeneous CoNiO 2 /Co 4 N nanowires have been fabricated and employed as additive of graphene based sulfur cathode. Through optimizing the nitriding degree, the continuous heterostructure interface can be obtained, accompanied by effective adjustment of energy band structure. By combining the strong adsorptive and catalytic properties of CoNiO 2 and electrical conductivity of Co 4 N, the in situ formed CoNiO 2 /Co 4 N heterostructure reveals a synergistic enhancement effect. Theoretical calculation and experimental design show that it can not only significantly inhibit "shuttle effect" through chemisorption and catalytic conversion of polysulfides, but also improve the transport rate of ions and electrons. Thus, the graphene composite sulfur cathode supported by these CoNiO 2 /Co 4 N nanowires exhibits improved sulfur species reaction kinetics. The corresponding cell provides a high rate capacity of 688 mAh g −1 at 4 C with an ultralow decaying rate of ≈0.07% per cycle over 600 cycles. The design of heterostructure nanowires and graphene composite structure provides an advanced strategy for the rapid capture-diffusion-conversion process of polysulfides.

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Improving poisoning resistance of electrocatalysts via alloying strategy for high-performance lithium-sulfur batteries

Cited by 67 publications

References 33 publications

Design of Quasi‐MOF Nanospheres as a Dynamic Electrocatalyst toward Accelerated Sulfur Reduction Reaction for High‐Performance Lithium–Sulfur Batteries

Design of Quasi‐MOF Nanospheres as a Dynamic Electrocatalyst toward Accelerated Sulfur Reduction Reaction for High‐Performance Lithium–Sulfur Batteries

Accelerating Sulfur Redox Reactions by Topological Insulator Bi₂Te₃ for High‐Performance Li‐S Batteries

CoNiO₂/Co₄N Heterostructure Nanowires Assisted Polysulfide Reaction Kinetics for Improved Lithium–Sulfur Batteries

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Improving poisoning resistance of electrocatalysts via alloying strategy for high-performance lithium-sulfur batteries

Cited by 67 publications

References 33 publications

Design of Quasi‐MOF Nanospheres as a Dynamic Electrocatalyst toward Accelerated Sulfur Reduction Reaction for High‐Performance Lithium–Sulfur Batteries

Design of Quasi‐MOF Nanospheres as a Dynamic Electrocatalyst toward Accelerated Sulfur Reduction Reaction for High‐Performance Lithium–Sulfur Batteries

Accelerating Sulfur Redox Reactions by Topological Insulator Bi2Te3 for High‐Performance Li‐S Batteries

CoNiO2/Co4N Heterostructure Nanowires Assisted Polysulfide Reaction Kinetics for Improved Lithium–Sulfur Batteries

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Accelerating Sulfur Redox Reactions by Topological Insulator Bi₂Te₃ for High‐Performance Li‐S Batteries

CoNiO₂/Co₄N Heterostructure Nanowires Assisted Polysulfide Reaction Kinetics for Improved Lithium–Sulfur Batteries