A hybrid shell material with mixed ion/electron conductivity used for high-performance Li–S batteries

Li, Huanhuan; Ge, Zhaofei; Zheng, Yanping; Xue, Yan; Bai, Guangyue; Wang, Jianji; Zhuo, Kelei; Wang, Yujie

doi:10.1039/c8cc09878f

Cited by 14 publications

(12 citation statements)

References 26 publications

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“…Thanks to the polarity and affinity of niobium-based materials to LPS, the preparation of materials with cavity structure has a good application prospect in Li-S batteries. Wang and co-workers [77] integrated hollow Nb 2 O 5 microspheres (2-3 μm) with highly conductive graphene oxide to construct hybrid shell material with excellent ionic/electronic conductivity (M-Nb 2 O 5 @rGO). Polar Nb 2 O 5 has fast Li þ transmission channel and stable chemical interaction with PS, promoting PS transformation into Li 2 S. The huge pore space with high sulfur load significantly alleviates the sulfur volume expansion during energy storage process.…”

Section: Lithium-sulfur Batterymentioning

confidence: 99%

Section: Supercapacitorsmentioning

confidence: 99%

Section: Supercapacitorsmentioning

confidence: 99%

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Optimization Design and Application of Niobium‐Based Materials in Electrochemical Energy Storage

Lian

Yang

Wang

et al. 2020

Adv Energy and Sustain Res

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In various energy storage devices, the development and research of electrode materials has always been a key factor. Nb‐based materials are one choice of energy storage materials because of the good ion‐diffusion channels and high theoretical capacity. More importantly, their advantages, such as safe potential range, high structural stability, and highly reversible redox reaction with small strain, are conducive to efficient, safe, and stable energy storage development. Based on aforementioned superiority, much of the research is to further optimize performance of Nb‐based materials by unique nano‐morphology design, lattice regulation, and functional additives composition, showing good electrochemical performance in many kinds of devices. This review mainly introduces the classification of Nb‐based materials used for energy storage, their application in different battery systems, and common optimization methods. Accordingly, the deficiencies and prospects of Nb‐based materials are also discussed in detail.

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Section: Lithium-sulfur Batterymentioning

confidence: 99%

Section: Supercapacitorsmentioning

confidence: 99%

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Optimization Design and Application of Niobium‐Based Materials in Electrochemical Energy Storage

Lian

Yang

Wang

et al. 2020

Adv Energy and Sustain Res

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“…[32][33][34][35] Compared with the physical adsorption, the polar metal sulfide/oxide/nitride or other metal compounds with electrochemically catalytic property (such as Co 9 S 8 , Nb 2 O 5 , Fe 3 C, TiN) could localize and propel the redox action of LiPS through the strong chemical interactions and further retard their dissolution. [36][37][38][39][40][41][42][43] But the inherent poor electronic conductivity of metal sulfide/oxide is undesirable to the reversible redox reaction in rapid charge-discharge process. In addition, the sluggish conversion of anchored polysulfides through chemical interaction could increase the risk of loss of active intermediates in the ultralong electrochemical process.…”

Section: Introductionmentioning

confidence: 99%

Engineering Functional Interface with Built‐in Catalytic and Self‐Oxidation Sites for Highly Stable Lithium–Sulfur Batteries

Chen

Miao

et al. 2021

Chemistry A European J

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Lithium−sulfur (Li−S) batteries have attracted great attention due to their high theoretical energy density. The rapid redox conversion of lithium polysulfides (LiPS) is effective for solving the serious shuttle effect and improving the utilization of active materials. The functional design of the separator interface with fast charge transfer and active catalytic sites is desirable for accelerating the conversion of intermediates. Herein, a graphene‐wrapped MnCO3 nanowire (G@MC) was prepared and utilized to engineer the separator interface. G@MC with active Mn2+ sites can effectively anchor the LiPS by forming the Mn−S chemical bond according to our theoretical calculation results. In addition, the catalytic Mn2+ sites and conductive graphene layer of G@MC could accelerate the reversible conversion of LiPS via the spontaneous “self‐redox” reaction and the rapid electron transfer in electrochemical process. As a result, the G@MC‐based battery exhibits only 0.038 % capacity decay (per cycle) after 1000 cycles at 2.0 C. This work affords new insights for designing the integrated functional interface for stable Li−S batteries.

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“…For instance, the poor electronic conductivity of sulfur (5 × 10 –30 S cm –1 at room temperature) and solid products of sulfides limits the electron transport and leads to low active material utilization; the migration of soluble long‐chain lithium polysulfides (LiPSs, Li 2 S n , 4 ≤ n ≤ 8) causes side reactions on the surface of lithium metal, resulting in low battery efficiency and fast capacity decay; [ 3 ] in addition, an ≈80% volumetric expansion happens to sulfur cathode upon its lithiation process, thus incurring a large mechanical stress on the electrode structure, and giving rise to cathode damage. Aimed at these scientific issues, various strategies including the ideal design of cathode matrixes, [ 4 ] decoration of separators, [ 5 ] insertion of interlayers, [ 6 ] and developing new electrolytes, [ 7 ] have been actively developed. Although significant developments have been made in the past two decades, there is still considerable headroom for LSB as long as advanced cathode materials are excavated, especially for flexible LSB.…”

Section: Introductionmentioning

confidence: 99%

Catalytic and Dual‐Conductive Matrix Regulating the Kinetic Behaviors of Polysulfides in Flexible Li–S Batteries

Chen

Xue

et al. 2020

Advanced Energy Materials

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The main challenge in developing foldable Li–S batteries (LSB) lies in developing an electrode that is ultraflexible, conductive, and catalytic for dissolved lithium polysulfides (LiPSs). In this paper, lightweight macromolecule graphitic carbon nitride (g‐C3N4) film and a conductive polymer (CP) of poly(3,4‐ethylenedioxythiophene) shell are introduced into flexible LSBs by compositing with carbon cloth (CC). In the designed hybrid of CP/g‐C3N4@CC, 2D g‐C3N4 is used in the form of an effective trapper and functions as a continuous catalytic layer for LiPSs via the formation of pyridinic‐N‐Li bonds. This is revealed by both experimental investigations and theoretical analysis. The sandwich‐like CC and CP simultaneously bring an omnidirectional conductive network for fast interfacial reaction kinetics. With these benefits, the self‐supported CP/g‐C3N4@CC forms a powerful interaction system to fully in situ “lock” LiPSs in the commercial CC matrix. Thus, a substantially enhanced electrochemical performance is obtained at a high sulfur loading (4.7 mg cm–2) even operating in a pouch cell. This work may provide a potential avenue for practical use of high‐performance LSBs toward flexible energy‐storage devices.

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A hybrid shell material with mixed ion/electron conductivity used for high-performance Li–S batteries

Cited by 14 publications

References 26 publications

Optimization Design and Application of Niobium‐Based Materials in Electrochemical Energy Storage

Optimization Design and Application of Niobium‐Based Materials in Electrochemical Energy Storage

Engineering Functional Interface with Built‐in Catalytic and Self‐Oxidation Sites for Highly Stable Lithium–Sulfur Batteries

Catalytic and Dual‐Conductive Matrix Regulating the Kinetic Behaviors of Polysulfides in Flexible Li–S Batteries

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