Hollow heterostructure design enables self-cleaning surface for enhanced polysulfides conversion in advanced lithium-sulfur batteries

Ren, Ruina; Zhao, Zhenxin; Meng, Zhirong; Wang, Xiaomin

doi:10.1016/j.jcis.2021.10.081

Cited by 17 publications

(9 citation statements)

References 49 publications

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“…The component O III with a high binding energy (530.9 eV) comes from the oxygen adsorbed on its surface. [36] The existence of oxygen vacancies in NiMoO 4 can significantly improve its conductivity and accelerate the oxidation-reduction reaction of polysulfides, and the existence of defects increases the polarity of NiMoO 4 , which is beneficial to the anchoring of LiPS. The high-resolution S 2p spectrum of NiMoO 4 after adsorption with Li 2 S 6 is investigated in Figure 3d.…”

Section: Resultsmentioning

confidence: 99%

“…The O II peak at 530.35 eV indicates the existence of oxygen vacancy group defects. The component O III with a high binding energy (530.9 eV) comes from the oxygen adsorbed on its surface [36] . The existence of oxygen vacancies in NiMoO 4 can significantly improve its conductivity and accelerate the oxidation‐reduction reaction of polysulfides, and the existence of defects increases the polarity of NiMoO 4 , which is beneficial to the anchoring of LiPS.…”

Section: Resultsmentioning

confidence: 99%

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Mo and Ni Coordinated Bimetallic Oxide as Catalyst in Modified Separators for Low‐Capacity Decay Lithium Sulfur Batteries

Dou

Zhao

et al. 2023

ChemNanoMat

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Lithium-sulfur (LiÀ S) batteries are considered to be the most promising candidates for achieving low-cost, highenergy density systems. The serious shuttle effect of polysulfides (LiPS) and the sluggish redox kinetics have become major obstacles to the practical application of LiÀ S batteries. Herein, a hollow microsphere structure of transition bimetallic oxide nickel molybdate (NiMoO 4 ) was prepared by hydrothermal reaction and calcination method. It was used as a separator coating material to inhibit LiPS shuttle and promote efficient redox conversion of sulfur species. The hollow microsphere structure not only possesses a large internal space to physically confine LiPS but also exposes abundant active sites to enhance the redox kinetics of LiPS. The NiMoO 4 shows superior adsorption ability for LiPS and accelerated ion/electron transport rates compared to NiO, thus facilitating the anchoring-conversion-diffusion processes of polysulfides. Benefiting from this versatility, the LiÀ S batteries with NiMoO 4 -PP exhibit a high discharge specific capacity of 1354.5 mAh g À 1 at 0.1 C. In addition, the battery exhibits excellent cycling stability with a capacity decay rate of 0.027% for 500 cycles at 2 C. These results demonstrate the potential application of NiMoO 4 -based electrocatalysts in high-performance LiÀ S batteries.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Mo and Ni Coordinated Bimetallic Oxide as Catalyst in Modified Separators for Low‐Capacity Decay Lithium Sulfur Batteries

Dou

Zhao

et al. 2023

ChemNanoMat

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“…Hierarchically TiS 2 ‐TiO 2 , heterostructure NiCoO 2 ‐NiCoP, etc., were also obtained based on this coordination mechanism. [ 111,134 ]…”

Section: Heterostructure‐modified Separators For Promoting Polysulfid...mentioning

confidence: 99%

“…Meanwhile, in view of the affinity of some polar materials for Li–S electrolyte due to the relatively small surface tension, the involved heterostructure can also improve the electrolyte infiltration ability of ordinary separators, so as to enhance the utilization rate of sulfur and further strengthen the cell dynamics, such as heterostructured MoS 2 /MoO 3 , NiCoO 2 /NiCoP, and TiS 2 /TiO 2 . [ 109,111,134 ]…”

Section: Perspectives and Conclusionmentioning

confidence: 99%

Effect of Heterostructure‐Modified Separator in Lithium–Sulfur Batteries

Wang

Tan

et al. 2023

Small

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Lithium–sulfur (Li–S) batteries with high energy density and low cost are the most promising competitor in the next generation of new energy reserve devices. However, there are still many problems that hinder its commercialization, mainly including shuttle of soluble polysulfides, slow reaction kinetics, and growth of Li dendrites. In order to solve above issues, various explorations have been carried out for various configurations, such as electrodes, separators, and electrolytes. Among them, the separator in contact with both anode and cathode is in a particularly special position. Reasonable design‐modified material of separator can solve above key problems. Heterostructure engineering as a promising modification method can combine characteristics of different materials to generate synergistic effect at heterogeneous interface that is conducive to Li–S electrochemical behavior. This review not only elaborates the role of heterostructure‐modified separators in dealing with above problems, but also analyzes the improvement of wettability and thermal stability of separators by modification of heterostructure materials, systematically clarifies its advantages, and summarizes some related progress in recent years. Finally, future development direction of heterostructure‐based separator in Li–S batteries is given.

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“…Metal atoms with abundant polar sites can be strongly bonded to LiPSs through Lewis acid-base interactions, polar-polar interactions, and sulfur-chain catenation, thus anchoring and trapping them to the host surface and reducing the loss of active substances [19,20]. However, single compound catalysts cannot balance the adsorption and desorption of LiPSs, resulting in poor catalytic activity [21]. Therefore, catalysts with multiple anchoring and catalytical active centers are needed to provide proper adsorption capacity for LiPSs and accelerate its conversion.…”

Section: Introductionmentioning

confidence: 99%

Status and Prospects of High-Entropy Materials for Lithium–Sulfur Batteries

Yao¹,

Chen²,

Niu³

et al. 2023

Preprint

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The emergence of various electronic devices and equipment such as electric vehicles and drones requires higher energy density energy storage devices. Lithium-sulfur batteries (LSBs) are considered as the most promising new generation energy storage system owing to high theoretical specific capacity and energy density. However, the severe shuttle behaviors of soluble lithium polysulfides (LiPSs) and the slow redox kinetics lead to low sulfur utilization and poor cycling stability, which seriously hinder the commercial application of LSBs. Therefore, various catalytic materials have been employed to solve these troublesome problems. High entropy materials (HEMs), as advanced materials, can provide unique surface and electronic structures that expose plentiful catalytic active sites, which opens new ideas for the regulation of LiPSs redox kinetics. Notwithstanding many instructive reviews in the land of LSBs, while this review aims to offer a complete and shrewd summary of the current progresses in HEMs-based LSBs, including in-depth interpretation of design principles and mechanistic electrocatalysis functions as well as pragmatic perspectives.

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Hollow heterostructure design enables self-cleaning surface for enhanced polysulfides conversion in advanced lithium-sulfur batteries

Cited by 17 publications

References 49 publications

Mo and Ni Coordinated Bimetallic Oxide as Catalyst in Modified Separators for Low‐Capacity Decay Lithium Sulfur Batteries

Mo and Ni Coordinated Bimetallic Oxide as Catalyst in Modified Separators for Low‐Capacity Decay Lithium Sulfur Batteries

Effect of Heterostructure‐Modified Separator in Lithium–Sulfur Batteries

Status and Prospects of High-Entropy Materials for Lithium–Sulfur Batteries

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