Strong lithium polysulfides chemical trapping of TiC-TiO2/S composite for long-cycle lithium-sulfur batteries

Cui, Zhenqi; Yao, Jia; Mei, Tao; Zhou, Shiyuan; Hou, Baofei; Li, Jing; Li, Jinhua; Wang, Jianying; Qian, Jingwen; Wang, Xiaochang C.

doi:10.1016/j.electacta.2018.12.075

Cited by 48 publications

(21 citation statements)

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“…Among transition metal carbides, titanium carbide (TiC) is an important non-oxide ceramic material due to its good chemical stability, extreme hardness, high melting point (about 3,200°C), high Young’s modulus, low density (4.93 g/ml), and good electrical and thermal conductivity ( Wang et al, 2012a ; Wang et al, 2012b ; Xiao et al, 2016 ). Recently, TiC has been considered for use in energy storage due to its outstanding characteristics ( Liu et al, 2018 ; Cui et al, 2019 ; Cai et al, 2020 ; Geng et al, 2021 ). Specifically, in an Li–S battery, the synthesized TiC can be used to enhance the cycling performance through the strong polar binding interactions with sulfur species and can better suppress the diffusion of lithium polysulfides (LiPS) compared with other materials ( Zhang et al, 2016 ; Cui et al, 2018 ; Zhang et al, 2018 ; Zhang et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

“…Mei and co-workers successfully prepared a TiC–TiO 2 /S composite and the result shows that the cathode with a TiC–TiO 2 /S composite delivers a high initial discharge specific capacity of 1,218 mAh g −1 at 1 C rate ( Cui et al, 2019 ). In the TiC–TiO 2 /S composite, TiC can not only chemically bond with polysulfides but also improve the electrical conductivity of the assembled cells ( Cui et al, 2019 ; Geng et al, 2021 ). The result also shows that it can promote the conversion kinetics of LiPS to final Li 2 S 2 /Li 2 S during the electrochemistry of Li–S batteries (Zhang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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Taming Polysulfides in an Li–S Battery With Low-Temperature One-step Chemical Synthesis of Titanium Carbide Nanoparticles From Waste PTFE

et al. 2021

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In this work, titanium carbide (TiC) nanoparticles have been successfully synthesized at much lower temperatures of 500°C using cheaper starting materials, such as waste polytetrafluoroethylene (PTFE) (carbon source) and titanium and metallic sodium, than the traditional carbothermal reduction of TiO2 at 1,800°C. An XRD pattern proved the formation of face-centered cubic TiC, and TEM images showed the obtained TiC nanoparticles with an average size of approximately 50 nm. In addition, the separator coated with TiC nanoparticles as an active material of interlayer effectively mitigates the shuttling problem by taming the polysulfides in Li–S batteries compared with a traditional celgard separator. The assembled cell realizes good cycling stability with 501 mAh g−1 and a low capacity fading of 0.1% per cycle after 300 cycles at 1 C due to high utilization of the sulfur-based active species.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Taming Polysulfides in an Li–S Battery With Low-Temperature One-step Chemical Synthesis of Titanium Carbide Nanoparticles From Waste PTFE

et al. 2021

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“…Mei and co‐workers prepared a TiC–TiO 2 hybrid composite by a water bath reaction using the TiC powders and nitric acid/ethanol as precursors and reaction solvent, respectively. [ 34 ] When used as a sulfur host for Li–S batteries, the prepared TiC–TiO 2 composite effectively mitigated the shuttle effect of LiPSs and improved the rate performance of Li–S batteries. Cai and co‐workers synthesized a TiO 2 /TiC composite as a sulfur immobilizer for Li–S batteries using a more complex and time‐consuming wet‐chemical route with a post‐treatment of high‐temperature sintering, [ 35,36 ] significantly improving the specific capacity of Li–S batteries.…”

Section: Introductionmentioning

confidence: 99%

Immobilizing Polysulfide by In Situ Topochemical Oxidation Derivative TiC@Carbon‐Included TiO₂ Core–Shell Sulfur Hosts for Advanced Lithium–Sulfur Batteries

Zhang

Yuan

Yang

et al. 2020

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The performance of lithium–sulfur (Li–S) batteries is greatly hindered by the notorious shuttle effect of lithium polysulfides (LiPSs). To address this issue, in situ topochemical oxidation derivative TiC@carbon‐included TiO2 (TiC@C‐TiO2) core–shell composite is designed and proposed as a multifunctional sulfur host, which integrates the merits of conductive TiC core to facilitate the redox reaction kinetics of sulfur species, and porous C‐TiO2 shell to suppress the dissolution and shuttling of LiPSs through chemisorption. A unique dual chemical mediation mechanism is demonstrated for the proposed TiC@C‐TiO2 composite that synergistically entraps LiPSs through thiosulfate/polythionate conversion coupled with strong polar–polar interaction. The morphological characterization reveals that the TiC@C‐TiO2‐based cathode can well regulate the distribution of electrode materials to retard their accumulation inside the electrode, ensuring effective contact between the active materials and electrolyte. Based on its unique function and structure, the cathode delivers an improved capacity of 1256 mAh g−1 at 0.2C, a remarkable rate capability of 643 mAh g−1, and an ultralow capacity decay rate of 0.065% per cycle at 2C over 900 cycles. This work not only demonstrates a dual chemical mediation mechanism to immobilize LiPSs, but also provides a universal strategy to construct multifunctional sulfur hosts for advanced Li–S batteries.

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“…[9][10][11][12] In addition, sulfur has been used to replace oxygen for obtaining more excellent electrochemical activity and higher electronic conductivity, which can be expected to show better electrochemical properties than TMOs. [13][14][15][16][17] Among the transition metal sulfides (TMSs), ZnS possesses some advantages, such as high electrical conductivity, excellent electronic properties and stability, and then has been used as energy storage material. [18][19][20] However, most ZnS-based composites show low specific capacitance.…”

Section: Introductionmentioning

confidence: 99%

Construction of Porous ZnS@Co₃S₄@NiO Nanosheets Hybrid Materials for High‐Performance Pseudocapacitor Electrode by Morphology Reshaping

Liu

Peng

et al. 2020

Advanced Sustainable Systems

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Designing electrode materials with high reversible capacitance is the key to developing high‐performance pseudocapacitors. In this work, a novel ternary hybrid material, porous ZnS@Co3S4@NiO nanosheets are successfully constructed through a morphology reshaping enabled by a hydrothermal method followed by calcination. From a macroscopic view, the introduction of NiO changes the nanorod morphology of ZnS@Co3S4, and forms a porous nanosheet structure. The porous architecture with an increased specific surface area can promote the transport of ions and electrons, accelerate the diffusion of the electrolyte, and offer more active sites for electrochemical reactions. These advantages enhance the electrochemical properties of ZnS@Co3S4@NiO nanosheets when used as electrode materials for supercapacitors. ZnS@Co3S4@NiO nanosheets deliver an initial capacitance of 1418.7 F g−1, and it also reaches 1550.9 F g−1 with a capacitance retention rate of 109.3% at 5 A g−1, after 5000 cycles. However, ZnS@Co3S4 nanorods only deliver an initial capacitance of 708.7 F g−1, and maintain 716.4 F g−1 with a capacitance retention rate of 101.1% after 5000 cycles. These results show that the ZnS@Co3S4@NiO nanosheets are a promising electrode material for high‐performance pseudocapacitor electrode, and morphology reshaping is an effective strategy to design high‐performance pseudocapacitive materials.

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Strong lithium polysulfides chemical trapping of TiC-TiO2/S composite for long-cycle lithium-sulfur batteries

Cited by 48 publications

References 60 publications

Taming Polysulfides in an Li–S Battery With Low-Temperature One-step Chemical Synthesis of Titanium Carbide Nanoparticles From Waste PTFE

Taming Polysulfides in an Li–S Battery With Low-Temperature One-step Chemical Synthesis of Titanium Carbide Nanoparticles From Waste PTFE

Immobilizing Polysulfide by In Situ Topochemical Oxidation Derivative TiC@Carbon‐Included TiO₂ Core–Shell Sulfur Hosts for Advanced Lithium–Sulfur Batteries

Construction of Porous ZnS@Co₃S₄@NiO Nanosheets Hybrid Materials for High‐Performance Pseudocapacitor Electrode by Morphology Reshaping

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Strong lithium polysulfides chemical trapping of TiC-TiO2/S composite for long-cycle lithium-sulfur batteries

Cited by 48 publications

References 60 publications

Taming Polysulfides in an Li–S Battery With Low-Temperature One-step Chemical Synthesis of Titanium Carbide Nanoparticles From Waste PTFE

Taming Polysulfides in an Li–S Battery With Low-Temperature One-step Chemical Synthesis of Titanium Carbide Nanoparticles From Waste PTFE

Immobilizing Polysulfide by In Situ Topochemical Oxidation Derivative TiC@Carbon‐Included TiO2 Core–Shell Sulfur Hosts for Advanced Lithium–Sulfur Batteries

Construction of Porous ZnS@Co3S4@NiO Nanosheets Hybrid Materials for High‐Performance Pseudocapacitor Electrode by Morphology Reshaping

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Immobilizing Polysulfide by In Situ Topochemical Oxidation Derivative TiC@Carbon‐Included TiO₂ Core–Shell Sulfur Hosts for Advanced Lithium–Sulfur Batteries

Construction of Porous ZnS@Co₃S₄@NiO Nanosheets Hybrid Materials for High‐Performance Pseudocapacitor Electrode by Morphology Reshaping