Dawson-type polyoxometalate modified separator for anchoring/catalyzing polysulfides in high-performance lithium-sulfur batteries

Zhang, Hangyu; Ma, Zhiyuan; Duan, Suqin; Liu, Yi; Jiang, Xinyuan; Zhou, Qiuping; Chen, Ming; Ni, Lubin; Diao, Guowang

doi:10.1016/j.electacta.2022.140868

Cited by 16 publications

(13 citation statements)

References 85 publications

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“…Notably, such a low capacity attenuation and competitive performance are superior to other separator modifiers previously reported in literature works (Figure 5i; Table S3, Supporting Information). [26,[51][52][53][54][55][56][57][58][59] To meet the demand for practical applications, Li-S battery with Mo 2 N-MoC/NC-PP was investigated under a high sulfur loading of 5.2 mg cm −2 and lean electrolyte (E/S ratio = 8.0 µL mg −1 ). The Super P host material is replaced with CNTs, and the sulfur content in CNTs/S is ≈73.72 wt.% (Figure S16, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

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Customizing Component Regulated Dense Heterointerfaces for Crafting Robust Lithium‐Sulfur Batteries

Zhao

Tan

Liu

et al. 2022

Adv Funct Materials

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Lithium–sulfur (Li–S) batteries hold great promise for the next‐generation energy storage system. However, their commercial applications are severely hindered by myriads of drawbacks such as poor electrical conductivity of sulfur, sluggish redox reaction kinetics of sulfur species, “shuttling effect” of soluble lithium polysulfides (LiPSs) and uncontrollable dendritic Li growth. Herein, it is conceptually demonstrated that sluggish conversion kinetics of LiPSs is markedly stimulated by exquisite heterointerface modulation at nanoscale level over transition metal carbides and nitrides. In this scenario, N‐doped carbon coupled with molybdenum nitride/carbide (Mo2N‐MoC/NC) hybrid nanocomposites are designed through a one‐step carbonization‐nitridation process, wherein component regulation induced dense heterointerfaces are in situ produced. Benefiting from high electrical conductivity, strong chemical adsorption, and superior catalytic activity afforded by dense heterointerfaces, the Mo2N‐MoC/NC modified separators significantly restrict the soluble LiPSs shuttling and simultaneously suppress the Li dendrite generation. The assembled Li–S batteries with Mo2N‐MoC/NC modified separators exhibit remarkable electrochemical performance. Integrated experimental and theoretical results substantiate the boosted chemisorption and catalytic conversion of LiPSs endowed by such dense heterointerfaces. The work will open a new vista for rationally constructing multifarious heterostructured materials for the communities of Li‐S batteries.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Customizing Component Regulated Dense Heterointerfaces for Crafting Robust Lithium‐Sulfur Batteries

Zhao

Tan

Liu

et al. 2022

Adv Funct Materials

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“…Polyoxometalates (POMs) are ideal EC and electrochemical storage materials. Owing to their unique multi-electron storage capacity and rich redox properties, POMs have been extensively studied for use in EC and energy-related technologies [ 26 , 27 , 28 , 29 ]. Fan et al [ 30 ] prepared a self-supporting composite based on H 3 PMo 12 O 40 heterogeneous blue-modified reduced graphite oxide (PAHB/RGO), which had a specific capacitance of 395 F g −1 at 1 A g −1 .…”

Section: Introductionmentioning

confidence: 99%

Sea-Cucumber-like Microstructure Polyoxometalate/TiO2 Nanocomposite Electrode for High-Performance Electrochromic Energy Storage Devices

Zhou

Liu

et al. 2023

Molecules

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The key challenge in the practical application of electrochromic energy storage devices (EESDs) is the fabrication of high-performance electrode materials. Herein, we deposited K7[La(H2O)x(α2-P2W17O61)] (P2W17La) onto TiO2 nanowires (NW) to construct an NW–P2W17La nanocomposite using a layer-by-layer self-assembly method. In contrast to the pure P2W17La films, the nanocomposite exhibits enhanced electrochromic and electrochemical performance owing to the 3D sea-cucumber-like microstructure. An EESD using the NW–P2W17La film as the cathode exhibited outstanding electrochromic and energy storage properties, with high optical modulation (48.6% at 605 nm), high switching speeds (tcoloring = 15 s, tbleaching = 4 s), and high area capacitance (5.72 mF cm−2 at 0.15 mA cm−2). The device can reversibly switch between transparent and dark blue during the charge/discharge process, indicating that electrochromic contrast can be used as a quantitative indicator of the energy storage status.

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“…Each tungsten atom in PTA will be in the highest valence state (VI), giving PTA a unique multi-electron storage capacity and powerful redox properties. 21 In electrochemical or chemical reactions, multiple electrons can be reversibly stored or transferred between the oxidized state [PW(VI) 12 O 40 ] 3− and reduced state [PW(IV) 2 W(VI) 10 O 40 ] 7− without changing the molecular structure.…”

Section: Introductionmentioning

confidence: 99%

“…Each tungsten atom in PTA will be in the highest valence state (VI), giving PTA a unique multi-electron storage capacity and powerful redox properties. 21 In electrochemical or chemical reactions, multiple electrons can be reversibly stored or transferred between the oxidized state [PW(VI) 12 In this work, a versatile PEC sensor protocol was established to quantitatively monitor GSH levels by utilizing Cu 2 O. The photocurrent of Cu 2 O was enhanced by introducing PTA, which inhibited the recombination probability of photo-generating carrier.…”

Section: Introductionmentioning

confidence: 99%

Ultrasensitive photoelectrochemical detection of glutathione based on the multifunctional catalytic properties of phosphotungstic acid

Jiang

Zhang

et al. 2023

Analyst

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Dawson-type polyoxometalate modified separator for anchoring/catalyzing polysulfides in high-performance lithium-sulfur batteries

Cited by 16 publications

References 85 publications

Customizing Component Regulated Dense Heterointerfaces for Crafting Robust Lithium‐Sulfur Batteries

Customizing Component Regulated Dense Heterointerfaces for Crafting Robust Lithium‐Sulfur Batteries

Sea-Cucumber-like Microstructure Polyoxometalate/TiO2 Nanocomposite Electrode for High-Performance Electrochromic Energy Storage Devices

Ultrasensitive photoelectrochemical detection of glutathione based on the multifunctional catalytic properties of phosphotungstic acid

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