Vanadium Sulfide@Sulfur Composites as High‐Performance Cathode for Advanced Lithium–Sulfur Batteries

Chen, Xiaojuan; Du, Gaohui; Zhang, Miao; Kalam, Abul; Ding, Shukai; Su, Qingmei; Xu, Bingshe; Al‐Sehemi, Abdullah G.

doi:10.1002/ente.201901163

Cited by 21 publications

(13 citation statements)

References 47 publications

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“…Sulfur hosts that function as alternatives to carbons, and encompass both good electronic and ionic conductivity can address these difficulties, such as transition metal sulfides (M x S y , M = V, Ti, Fe, Ni, Mo, etc.). [ 22–25 ] Some of these materials not only display excellent electronic conductivity (comparable to, or better than carbons), but also good Li‐ion diffusion properties and chemical stability, and interfacial compatibility with sulfur/thiophosphate materials. [ 26,27 ] They can also be involved in electrochemical reactions with lithium based on a dual insertion/conversion mechanism and thus contribute additional capacity.…”

Section: Introductionmentioning

confidence: 99%

A High Capacity All Solid‐State Li‐Sulfur Battery Enabled by Conversion‐Intercalation Hybrid Cathode Architecture

Kwok

Zhou

et al. 2020

Adv Funct Materials

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As demands for electrochemical energy storage continue to rise, alternative electrochemistries to conventional Li‐ion batteries become more appealing. Here, an intercalation‐conversion hybrid cathode that combines intercalation‐type VS2 with conversion‐type sulfur chemistry to construct high performance solid‐state lithium‐sulfur batteries is reported. The layered VS2 nanomaterial features Li‐ion transport channels, metallic conductivity, and active capacity contribution, all of which provide an ideal platform for the solid state S/Li2S redox couple to unlock its high gravimetric capacity. The S/VS2/Li3PS4 hybrid cathode composite is prepared by a facile, low‐cost, and low‐energy mechanical blending process. The S/VS2/Li3PS4|Li3PS4|Li/In (or Li) all‐solid‐state cell exhibits sulfur utilization of ≈85%, with a Coulombic efficiency of close to 100%. High areal capacity up to 7.8 mA h cm−2 with an active material loading (S/VS2) as high as 15.5 mg cm−2 is achieved.

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Section: Introductionmentioning

confidence: 99%

A High Capacity All Solid‐State Li‐Sulfur Battery Enabled by Conversion‐Intercalation Hybrid Cathode Architecture

Kwok

Zhou

et al. 2020

Adv Funct Materials

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“…Hence, the VS 2 /S cathode (1.68 mg cm −2 ) shows a discharge capacity of ∼341.1 at 3 C as well as a cycle decay of ∼0.16% during 200 cycles (0.2 C). Chen et al 75 demonstrated that in the VS 2 @S host, the porous structure accommodates the volumetric expansion that occurred during S lithiation, and the VS 2 shows a strong adsorption capability to LiPSs. Therefore, the VS 2 @S cathode presents a capacity of 413 mAh g −1 after 200 cycles at 1 C. Guo et al 59 found that the defect-abundant VS 2 with versatile pores contributes to suppressing the LiPSs shuttling via chemical anchoring.…”

Section: Two-step Deposition Methodmentioning

confidence: 99%

“…Wu et al 4 used a facile hydrothermal method to prepare VS 2 nanoflowers (NFs) comprised of aligned ultrathin nanosheets, where 1.16 mg/ cm 2 S (47 wt %) is supported on the surface of the VS 2 NFs host. Chen et al 75 developed VS 2 nanoparticles self-assembled microflowers that load 75 wt % S, (Figure 14B). Cheng et al 14 synthesized a Co-doped VN (Co-VN) microflower hierarchical structure with a 5% Co/V ratio as a substrate material, where 4.42 mg/cm 2 S are supported on the surface of the Co-VN host (Figure 14C).…”

Section: Strategies For Increasing Effective Areal S Loadingmentioning

confidence: 99%

Progress and Opportunities of Vanadium-Based Compounds as Cathode Hosts, Decoration Layers of Separators, and Interlayers in Lithium Sulfur Batteries

Wang

et al. 2022

Crystal Growth & Design

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Vanadium (V)-based compounds are increasingly used in lithium sulfur batteries because of their great working potential, large polarities, easily designed hierarchical structures, and moderate combination of V with nonmetallic atoms. In this review, recent advances regarding vanadium oxides, vanadium sulfides, vanadium nitrogens, and coupling systems of vanadium oxide/nitrogen/carbide as cathode hosts, decoration layers of separators, and interlayers are systematically introduced. Especially, the electrochemical enhancement mechanisms of the V-based compound hosts on the inhibition of the shuttle effect mainly include physical confinement, chemical anchoring, and catalytic conversion. The chemical interactions between VO x /VS x /VN hosts and LiPSs are Li–O or V–S, V–S, and Li–N or V–S bonds, respectively, and VS x has more modest sulfiphilic properties to sulfur-containing species than VO x . Besides, strategies for increasing effective areal S loading are refined as designing the hierarchical structure and selecting a suitable loading method. We hope that this review will shed light on the importance of V-based composites in lithium sulfur batteries and promote the further development of lithium sulfur batteries.

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Section: Metal Dichalcogenidementioning

confidence: 99%

Lithium–Sulfur Battery Cathode Design: Tailoring Metal‐Based Nanostructures for Robust Polysulfide Adsorption and Catalytic Conversion

2021

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portable electronic devices such as laptops and mobile phones. However, with the increasing demand for clean energy and portable electronics, the energy densities powered by the LIB (≈300 mAh g −1 ) are beginning to reach the threshold limit and thus, leading to a need for an alternate environmentally friendly and more economical energy storage technology with higher energy densities. [1] One of the most promising candidates for the LIB replacement is the lithium-sulfur (Li-S) battery, which utilizes the redox reaction between sulfur and lithium. Compared to LIB and other metal-sulfur batteries (Figure 1a), Li-S batteries are profiled as a viable energy storage technology stemming from their high specific energy capacity of 1675 mAh g −1 and superior energy density of around 2670 Wh kg −1 . [1a-d,2] The elemental sulfur, which is used as the cathode material, also has a multitude of auspicious properties such as its inexpensiveness, environmentally friendliness, abundancy and non-toxicity. [2d,3] In addition, another emerging battery system is the metal-air battery, which is a half-open system that utilize oxygen from ambient air as the active cathode material. Thus, Li-S batteries are comparatively safer due to their enclosed system. Apart from that, the influence of CO 2 , H 2 O, and N 2 in ambient air can lead to chemical instability in metal-air batteries. [4] Taking Li-air batteries as an example, the presence of CO 2 leads to the formation of Li 2 CO 3 , which is more chemically stable than Li 2 O 2 and causes a larger charge overpotential, hence leading to decomposition issues of electrolytes. [5] Nevertheless, progress for the real-world usage of Li-S batteries is currently hindered by multiple drawbacks. First, despite its manifold advantages, sulfur and its discharge products (Li 2 S or Li 2 S 2 ) are inherently insulating with low conductivities of 10 −7 to 10 −30 S cm −1 at room temperature, rendering it unbefitting to be directly used as the cathode. [6] Second, the inevitable volume expansion of the electrode (≈80%) due to the contrasting densities of S 8 and Li 2 S causes structural damage during the charge/discharge cycle. [7] Third, the "polysulfide shuttle effect" would occur, whereby the soluble higher order polysulfides (Li 2 S 4 to Li 2 S 8 ) dissolve in the electrolyte and migrate between the anode and the cathode, leading to its Lithium-sulfur (Li-S) batteries have a high specific energy capacity and density of 1675 mAh g −1 and 2670 Wh kg −1 , respectively, rendering them among the most promising successors for lithium-ion batteries. However, there are myriads of obstacles in the practical application and commercialization of Li-S batteries, including the low conductivity of sulfur and its discharge products (Li 2 S/Li 2 S 2 ), volume expansion of sulfur electrode, and the polysulfide shuttle effect. Hence, immense attention has been devoted to rectifying these issues, of which the application of metal-based compounds (i.e., transition metal, metal phosphides, sulfides, oxides, carbides...

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Vanadium Sulfide@Sulfur Composites as High‐Performance Cathode for Advanced Lithium–Sulfur Batteries

Cited by 21 publications

References 47 publications

A High Capacity All Solid‐State Li‐Sulfur Battery Enabled by Conversion‐Intercalation Hybrid Cathode Architecture

A High Capacity All Solid‐State Li‐Sulfur Battery Enabled by Conversion‐Intercalation Hybrid Cathode Architecture

Progress and Opportunities of Vanadium-Based Compounds as Cathode Hosts, Decoration Layers of Separators, and Interlayers in Lithium Sulfur Batteries

Lithium–Sulfur Battery Cathode Design: Tailoring Metal‐Based Nanostructures for Robust Polysulfide Adsorption and Catalytic Conversion

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