Molten salt assisted fabrication of ferroelectric BaTiO3 based cathode for high-performance lithium sulfur batteries

Chang, Chengshuai; Di, Shuanlong; Gao, Guangying; Zhai, Boyin; Chen, Silin; Wang, Shulan; Li, Xuan; Li, Li

doi:10.1016/j.cej.2022.135031

Cited by 17 publications

(12 citation statements)

References 52 publications

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“…Next, the potential difference (Δ E ) between C 2 and A 1 for the three composite materials was compared. The VOOH@CNTs/S and VOOH/S electrodes exhibit the Δ E values of 327.4 and 362.7 mV, respectively, much lower than that of CNTs/S (414.6 mV), indicating the catalytic effect of VOOH in facilitating the conversion of LiPSs. , In addition, VOOH@CNTs/S shows a higher current response with sharper and well-separated peaks than the VOOH/S electrode, indicating the improved conversion kinetics of LiPSs. , The introduction of CNTs significantly improved the conductivity and simultaneously increased the number of active sites for the interfacial reaction; therefore, faster conversion of LiPSs can be achieved compared to the VOOH/S electrode. Furthermore, Figure b,c compares the Tafel plots of three electrodes for the reduction (C 2 ) and oxidation reactions (A 1 ).…”

Section: Resultsmentioning

confidence: 96%

“…41,42 In addition, VOOH@CNTs/S shows a higher current response with sharper and well-separated peaks than the VOOH/S electrode, indicating the improved conversion kinetics of LiPSs. 43,44 The introduction of CNTs significantly improved the conductivity and simultaneously increased the number of active sites for the interfacial reaction; therefore, faster conversion of LiPSs can be achieved compared to the VOOH/S electrode. Furthermore, Figure 3b,c compares the Tafel plots of three electrodes for the reduction (C 2 ) and oxidation reactions (A 1 ).…”

Section: Electrochemical Performancementioning

confidence: 99%

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Flower-Shaped Hollow VOOH Spheres Wrapped by Carbon Nanotubes as the Cathode Electrocatalyst Enable Ultrafast and Long-Lasting Li–S Batteries

Xiao

Sreekanth

et al. 2022

ACS Appl. Mater. Interfaces

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Lithium−sulfur batteries (LSBs) have been considered promising candidates for next-generation energy storage devices owing to their high energy density, low price, and environment-friendly characteristics. However, their commercialization has been hindered by the "shuttle effect", which occurs during the charge/discharge cycles and leads to poor cycling performance and low coulombic efficiency. Here, we synthesized flowershaped hollow VOOH spheres on the carbon nanotube (CNT) network, which were used as the multifunctional sulfur host materials for the first time in LSBs. These VOOH spheres can chemically and physically confine polysulfides as well as catalyze their redox conversion; additionally, their hollow structure can effectively accommodate the volume change during cycling. Moreover, the CNTs among spheres can improve the conductivity of the host material and increase the number of active sites for interfacial reactions. Accordingly, when used as a cathode material, VOOH@CNTs/S composites exhibited a large specific discharge capacity of 1414.63 mAh/g at 0.1 C and excellent cycling stability. At a low current density of 0.5 C, VOOH@CNTs/S exhibited a capacity decay of 0.044% per cycle after 100 cycles. Importantly, at an ultrahigh current density of 5 C, a specific capacity as high as 455.09 mAh/g could be still be delivered after 1000 cycles, corresponding to a superior capacity retention of 90.46% and an ultralow capacity decay of 0.009% per cycle. These findings open up a new material for the practical application of LSBs with ultrafast charge/discharge property and long-lasting cyclic stability.

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Section: Resultsmentioning

confidence: 96%

Section: Electrochemical Performancementioning

confidence: 99%

Flower-Shaped Hollow VOOH Spheres Wrapped by Carbon Nanotubes as the Cathode Electrocatalyst Enable Ultrafast and Long-Lasting Li–S Batteries

Xiao

Sreekanth

et al. 2022

ACS Appl. Mater. Interfaces

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“…Admittedly, it is well established that the spring of research on ferroelectric materials such as sulfur electrocatalysts has come. [78,79] In contrast, investigations into pyroelectric fields formed upon temperature fluctuation and triboelectric fields induced in the presence of contact and friction have yet to be reported, which merits a comprehensive exploration in future. [80]…”

Section: Spontaneous Polarization Switched By An External Efmentioning

confidence: 99%

Field‐assisted electrocatalysts spark sulfur redox kinetics: From fundamentals to applications

Zhang

et al. 2023

Interdisciplinary Materials

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The chief culprit impeding the commercialization of lithium–sulfur (Li–S) batteries is the parasitic shuttle effect and restricted redox kinetics of lithium polysulfides (LiPSs). To circumvent these key stumbling blocks, incorporating electrocatalysts with rational electronic structure modulation into sulfur cathode plays a decisive role in vitalizing the higher electrocatalytic activity to promote sulfur utilization efficiency. Breaking the stereotype of contemporary electrocatalyst design kept on pretreatment, field‐assisted electrocatalysts offer strategic advantages in dynamically controllable electrochemical reactions that might be thorny to regulate in conventional electrochemical processes. However, the highly interdisciplinary field‐assisted electrochemistry puzzles researchers for a fundamental understanding of the ambiguous correlations among electronic structure, surface adsorption properties, and catalytic performance. In this review, the mechanisms, functionality explorations, and advantages of field‐assisted electrocatalysts including electric, magnetic, light, thermal, and strain fields in Li–S batteries have been summarized. By demonstrating pioneering work for customized geometric configuration, energy band engineering, and optimal microenvironment arrangement in response to decreased activation energy and enriched reactant concentration for accelerated sulfur redox kinetics, cutting‐edge insights into the holistic periscope of charge‐spin‐orbital‐lattice interplay between LiPSs and electrocatalysts are scrutinized, which aspires to advance the comprehensive understanding of the complex electrochemistry of Li–S batteries. Finally, future perspectives are provided to inspire innovations capable of defeating existing restrictions.

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“…22 Moreover, the resultant built-in electric field can also improve Li-ion transportation for accelerating redox kinetics. 23–25 However, the directions of spontaneous polarization in ferroelectric domains are generally inconsistent without the external electric field, which results in the insufficient interaction of ferroelectric materials with polysulfides. 26 In this regard, aligning the dipoles of ferroelectric materials is, therefore, essential to maximize the ferroelectricity of functionalized separators for LSBs.…”

Section: Introductionmentioning

confidence: 99%

“…22 Moreover, the resultant built-in electric field can also improve Li-ion transportation for accelerating redox kinetics. [23][24][25] However, the directions of spontaneous polarization in ferroelectric domains are generally inconsistent without the external electric field, which results in the insufficient interaction of ferro- † Electronic supplementary information (ESI) available. See DOI: https://doi.org/ electric materials with polysulfides.…”

Section: Introductionmentioning

confidence: 99%

A separator modified by barium titanate with macroscopic polarization electric field for high-performance lithium–sulfur batteries

Zhang

et al. 2023

Nanoscale

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Molten salt assisted fabrication of ferroelectric BaTiO3 based cathode for high-performance lithium sulfur batteries

Cited by 17 publications

References 52 publications

Flower-Shaped Hollow VOOH Spheres Wrapped by Carbon Nanotubes as the Cathode Electrocatalyst Enable Ultrafast and Long-Lasting Li–S Batteries

Flower-Shaped Hollow VOOH Spheres Wrapped by Carbon Nanotubes as the Cathode Electrocatalyst Enable Ultrafast and Long-Lasting Li–S Batteries

Field‐assisted electrocatalysts spark sulfur redox kinetics: From fundamentals to applications

A separator modified by barium titanate with macroscopic polarization electric field for high-performance lithium–sulfur batteries

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