Sulfur-rich polymer/Ketjen Black composites as lithium-sulfur battery cathode with high cycling stability

Wu, Yangzhou; Ming, Yang; Wang, S.; Hou, Siyao; Zou, YaQun; Tao, Yong; Yang, Changan

doi:10.1016/j.jallcom.2023.171177

Cited by 8 publications

(3 citation statements)

References 55 publications

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“…The CV curves of the S-TVTCSi 4 - observable oxidation peak at 2.5 V was mainly ascribed to the conversion process of Li 2 S and short-chain Li-S-TVTCSi 4 to S-TVTCSi 4 . [33][34][35] The S-TVTCSi 4 -CNT 10% -based battery showed highly overlapping CV curves in the first three cycles, its oxidation/ reduction peak was not shifted and the peak current was not obviously reduced, suggesting its excellent electrochemical stability and reversibility, which is conducive to achieving a longer cycle life and better electrochemical performance of the battery.…”

Section: Resultsmentioning

confidence: 99%

“…The smaller reduction peak at 2.2 V was assigned to the conversion of S-TVTCSi 4 to long-chain lithium polysulfides (named Li-S-TVTCSi 4 ) and Li 2 S, and another reduction peak at 1.9 V was related to further reduction of long-chain Li-S-TVTCSi 4 to short chain Li-S-TVTCSi 4 and Li 2 S; the observable oxidation peak at 2.5 V was mainly ascribed to the conversion process of Li 2 S and short-chain Li-S-TVTCSi 4 to S-TVTCSi 4 . 33–35 The S-TVTCSi 4 -CNT 10% -based battery showed highly overlapping CV curves in the first three cycles, its oxidation/reduction peak was not shifted and the peak current was not obviously reduced, suggesting its excellent electrochemical stability and reversibility, which is conducive to achieving a longer cycle life and better electrochemical performance of the battery.…”

Section: Resultsmentioning

confidence: 99%

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Sulfur-containing polymer/carbon nanotube composite cathode materials for high-energy lithium–sulfur batteries

Wang,

Wu,

Yang

et al. 2024

New J. Chem.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Sulfur-containing polymer/carbon nanotube composite cathode materials for high-energy lithium–sulfur batteries

Wang,

Wu,

Yang

et al. 2024

New J. Chem.

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“…[1][2][3][4][5] Compared with energy storage devices such as batteries and supercapacitors, dielectric capacitors have faster charging and discharging efficiency, higher power density, and can meet the requirements of miniaturization, lightweight design, and high voltage levels. [6,7] Therefore, the research and development of dielectric capacitors with high energy storage density have become a focal point in the field of electrical engineering. [8,9] Polymer materials have the advantages of good flexibility, high breakdown strength, low dielectric loss, low quality, easy processing, and suitable for DOI: 10.1002/marc.202300485 large-scale manufacturing.…”

Section: Introductionmentioning

confidence: 99%

Antiferroelectric AgNbO₃@KH550 Doped PVDF/PMMA Composites with High Energy Storage Performance

Wang,

Kang,

et al. 2023

Macromol. Rapid Commun.

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The residual polarization of antiferroelectric ceramics is very small, yet they possess high energy storage density and efficiency. Incorporating antiferroelectric ceramic particles into a polymer matrix is beneficial for improving the energy storage performance of composites. However, excessive amounts of ceramic particles can lead to aggregation within the polymer, resulting in defects and a significant reduction in composite film performance. In this study, the antiferroelectric AgNbO3 is selected as the filler and modified with silane coupling agent KH550. poly(vinylidene fluoride) (PVDF) and polymethyl methacrylate (PMMA) are blended as the matrix, and the energy storage performance of the composite is improved by adjusting the additional amount of PVDF. The structure, dielectric properties, and energy storage properties of the composites are systematically studied. The results show that hydrogen bonds are formed between PVDF and PMMA, and PVDF and PMMA are tightly bonded under the action of hydrogen bonds. The compatibility of PVDF with PMMA is optimal when the mass fraction of PVDF is 30 wt%. Moreover, with the synergistic effect of the antiferroelectric filler AgNbO3, the breakdown strength of AgNbO3/PVDF/PMMA composites reaches 430 kV mm−1, and the energy storage density reaches 14.35 J cm−3.

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Engineering Strategies for Suppressing the Shuttle Effect in Lithium–Sulfur Batteries

Li,

Gao,

Pan

et al. 2023

Nano-Micro Lett.

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Lithium–sulfur (Li–S) batteries are supposed to be one of the most potential next-generation batteries owing to their high theoretical capacity and low cost. Nevertheless, the shuttle effect of firm multi-step two-electron reaction between sulfur and lithium in liquid electrolyte makes the capacity much smaller than the theoretical value. Many methods were proposed for inhibiting the shuttle effect of polysulfide, improving corresponding redox kinetics and enhancing the integral performance of Li–S batteries. Here, we will comprehensively and systematically summarize the strategies for inhibiting the shuttle effect from all components of Li–S batteries. First, the electrochemical principles/mechanism and origin of the shuttle effect are described in detail. Moreover, the efficient strategies, including boosting the sulfur conversion rate of sulfur, confining sulfur or lithium polysulfides (LPS) within cathode host, confining LPS in the shield layer, and preventing LPS from contacting the anode, will be discussed to suppress the shuttle effect. Then, recent advances in inhibition of shuttle effect in cathode, electrolyte, separator, and anode with the aforementioned strategies have been summarized to direct the further design of efficient materials for Li–S batteries. Finally, we present prospects for inhibition of the LPS shuttle and potential development directions in Li–S batteries.

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Sulfur-rich polymer/Ketjen Black composites as lithium-sulfur battery cathode with high cycling stability

Cited by 8 publications

References 55 publications

Sulfur-containing polymer/carbon nanotube composite cathode materials for high-energy lithium–sulfur batteries

Sulfur-containing polymer/carbon nanotube composite cathode materials for high-energy lithium–sulfur batteries

Antiferroelectric AgNbO₃@KH550 Doped PVDF/PMMA Composites with High Energy Storage Performance

Engineering Strategies for Suppressing the Shuttle Effect in Lithium–Sulfur Batteries

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Sulfur-rich polymer/Ketjen Black composites as lithium-sulfur battery cathode with high cycling stability

Cited by 8 publications

References 55 publications

Sulfur-containing polymer/carbon nanotube composite cathode materials for high-energy lithium–sulfur batteries

Sulfur-containing polymer/carbon nanotube composite cathode materials for high-energy lithium–sulfur batteries

Antiferroelectric AgNbO3@KH550 Doped PVDF/PMMA Composites with High Energy Storage Performance

Engineering Strategies for Suppressing the Shuttle Effect in Lithium–Sulfur Batteries

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Product

Resources

About

Antiferroelectric AgNbO₃@KH550 Doped PVDF/PMMA Composites with High Energy Storage Performance