Effective Polysulfide Rejection by Dipole‐Aligned BaTiO<sub>3</sub> Coated Separator in Lithium–Sulfur Batteries

Yim, Taeeun; Han, Seung Ho; Park, Nam Hwan; Park, Min; Lee, Ji Hoon; Shin, Jaeho; Choi, Jang Wook; Jung, Yongju; Jo, Yong Nam; Yu, Ji‐Sang; Kim, Ki Jae

doi:10.1002/adfm.201602498

Cited by 176 publications

(89 citation statements)

References 67 publications

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“…Recently, barium titanium oxide (BaTiO 3 ) particles were embedded in a conventional porous PE separator by a simple dip‐coating process As shown in Figure a, since the ferroelectric character of BTO is able to generate permanent dipoles by applying an electric field, dipoles of BaTiO 3 particles were aligned along the direction of the applied electric field and maintained permanently polarized, even after removing the electric potential. By this technique, the modified separator could effectively limit the polysulfides migration via electrostatic repulsion (Figure b).…”

Section: Separatormentioning

confidence: 99%

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A Comprehensive Understanding of Lithium–Sulfur Battery Technology

Bai

Gulzar

et al. 2019

Adv Funct Materials

299

233

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Lithium-sulfur batteries (LSBs) are regarded as a new kind of energy storage device due to their remarkable theoretical energy density. However, some issues, such as the low conductivity and the large volume variation of sulfur, as well as the formation of polysulfides during cycling, are yet to be addressed before LSBs can become an actual reality. Here, presented is a comprehensive overview illustrating the techniques capable of mitigating these undesirable problems together with the electrochemical performances associated to the different proposed solutions. In particular, the analysis is organized by separately addressing cathode, anode, separator, and electrolyte. Furthermore, to better understand the chemistry and failure mechanisms of LSBs, important characterization techniques applied to energy storage systems are reviewed. Similarly, considerations on the theoretical approaches used in the energy storage field are provided, as they can become the key tool for the design of the next generation LSBs. Afterward, the state of the art of LSBs technology is presented from a geopolitical perspective by comparing the results achieved in this field by the main world actors, namely Asia, North America, and Europe. Finally, this review is concluded with the application status of LSBs technology, and its prospects are offered.nonrenewable sources depletion and environment pollution (global warming and air/water quality). In particular, the abundant use of fossil fuels (especially coal and oil) is origin of many medical problems all over the world resulting in a constant rising of health-care national systems expenses. In this regard, especially solar and wind based energy sources, have been demonstrated to represent a valid alternative to fossil fuels. However, their energy instability related to a nonconstant presence of sun/wind, determines an intermittent energy production which severely jeopardize a stable and reliable energy supply to the grid. In order to mitigate and possibly even to completely solve this issue, a feasible solution is to couple solar/wind energy generators with energy storage devices. The presence of these systems would indeed allow the release of the produced energy into the grid at the right time, therefore avoiding any instability or even grid failure. Among the available energy storage devices, secondary batteries represent surely a valid choice owing to the abundant research in this field and to the number of applications already exploiting batteries as the main energy source. In this regard, here we recall lead-acid, nickel-cadmium and His work mainly aims in modeling and experimentally validating complex systems at the micro/nanoscale with strong emphasis on the final device. In particular, his research themes focus on the integration of different physics (i.e., interdisciplinary) such as photonics, heat diffusion, electric charge/mass diffusion, and mechanicaldeformation toward the development of innovative devices for energy manipulation (harvesting and storage).nitrogen element coul...

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Section: Separatormentioning

confidence: 99%

Section: Separatormentioning

confidence: 99%

A Comprehensive Understanding of Lithium–Sulfur Battery Technology

Bai

Gulzar

et al. 2019

Adv Funct Materials

299

233

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“…Recently, oxide materials have also gained attention because of their strong binding affinity to polysulfides. For instance, using Al 2 O 3 BaTiO 3 and SiO 2 . as coating materials, the electrochemical performance of both LSBs was improved by preventing polysulfides from passing through the separator.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalysis on Separator Modified by Molybdenum Trioxide Nanobelts for Lithium–Sulfur Batteries

Imtiaz

Zafar

Razaq

et al. 2018

Adv Materials Inter

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has substantially increased. [1] Accordingly, lithium-sulfur batteries (LSBs) have gained much attraction as future-generation rechargeable batteries due to the exceptional-specific energy density of 2600 Wh kg −1 and theoretical-specific capacity of 1675 mAh g −1 , which are significantly higher than those of the traditional lithium-ion batteries. [2] Regardless of the great potential, LSBs face some great challenges that hinder their commercialization. Some of the major challenges are the low active material utilization, which is a consequence of the insulating nature of orthorhombic sulfur and its discharged products, volume expansion during redox reactions, and shuttle effect that occurs due to dissolution of long-chain lithium polysulfides (Li 2 S x , 4 ≤ x ≤ 8) into the electrolyte, allowing the formation of insoluble, insulating Li 2 S 2 /Li 2 S precipitates on the surface of lithium anode and sulfur cathode. The dissolution of polysulfides not only retards the reaction kinetics of the electrodes, but also causes low Coulombic efficiency, rapid capacity fading, and poor cycle life of the LSBs. [3] Meanwhile, the lithium is highly reactive and the gas generation during cycling also results in speedy capacity degradation of LSBs. [4] Lithium-sulfur batteries (LSBs) have been regarded as the supreme feasible future generation energy storage system for high-energy applications due to the exceptional-specific energy density of 2600 Wh kg −1 and theoretical-specific capacity of 1675 mAh g −1 . Nevertheless, some key challenges which are linked with polysulfide shuttling and sluggish kinetics of polysulfide conversion are the main obstacles in the high electrochemical performance of LSBs. Here, a molybdenum trioxide (MoO 3 ) nanobelt catalytic layer is fabricated on the separator to solve these issues. The MoO 3 layer shows strong chemical interaction with polysulfides by successfully blocking the polysulfides on the separator from shuttling and significantly accelerates the redox reaction of polysulfide conversion. Furthermore, the randomly arranged layers of MoO 3 nanobelts possess enough porous networks that provide effective space for electrolyte infiltration and facile pathway for fast ion transportation. The resultant LSBs exhibit a very high initial capacity of 1377 mAh g −1 . After 200 cycles at 0.5 C, the capacity is 684.4 mAh g −1 with the fading rate of only 0.251% per cycle. Additionally, the MoO 3 modification provides good surface protection of lithium anode and depresses the lithium anode degradation. Battery Performance

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“…With strong electronic repulsion effects to negatively charged polysulfide species, a lithium‐sulfur battery with the modified PP separator shows a discharge capacity of 1250 mAh g −1 at 0.1 C and a capacity decay rate of 0.11%, better than those with the PP separator (1220mAh g −1 , 0.30%). Yim et al prepared a BaTiO 3 (BTO)‐coated PE separator via a simple dip‐coating process. After being placed in a 100 kV mm −1 electric field, permanent dipoles are generated in BTO particles to inhibit polysulfide shuttle effects through electrostatic repulsion (Figure C).…”

Section: Separators To Restrain Polysulfide Shuttle Effectmentioning

confidence: 99%

Mechanistic understanding of the role separators playing in advanced lithium‐sulfur batteries

Wei

Ren

Sokolowski

et al. 2020

InfoMat

242

147

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The lithium-sulfur battery is considered one of the most promising candidates for portable energy storage devices due to its low cost and high energy density.However, many critical issues, including polysulfide shuttling, self-discharge, lithium dendritic growth, and thermal hazards need to be addressed before the commercialization of lithium-sulfur batteries. To this end, tremendous efforts have been made to explore battery configurations and components, such as electrodes, electrolytes, and separators, among which the separator plays an especially critical role in addressing aforementioned issues. Thus, this review analyzes the mechanisms and interactions of these critical issues and summarizes both the function of separators and recent progress made towards remedying such issues. Additionally, promising directions for the development of separators in lithium-sulfur batteries are proposed. K E Y W O R D Slithium dendrite, lithium-sulfur batteries, self-discharge, separator, shuttle effect, thermal hazardsThe first two authors contributed equally to this work.

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Effective Polysulfide Rejection by Dipole‐Aligned BaTiO₃ Coated Separator in Lithium–Sulfur Batteries

Cited by 176 publications

References 67 publications

A Comprehensive Understanding of Lithium–Sulfur Battery Technology

A Comprehensive Understanding of Lithium–Sulfur Battery Technology

Electrocatalysis on Separator Modified by Molybdenum Trioxide Nanobelts for Lithium–Sulfur Batteries

Mechanistic understanding of the role separators playing in advanced lithium‐sulfur batteries

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Effective Polysulfide Rejection by Dipole‐Aligned BaTiO3 Coated Separator in Lithium–Sulfur Batteries

Cited by 176 publications

References 67 publications

A Comprehensive Understanding of Lithium–Sulfur Battery Technology

A Comprehensive Understanding of Lithium–Sulfur Battery Technology

Electrocatalysis on Separator Modified by Molybdenum Trioxide Nanobelts for Lithium–Sulfur Batteries

Mechanistic understanding of the role separators playing in advanced lithium‐sulfur batteries

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Effective Polysulfide Rejection by Dipole‐Aligned BaTiO₃ Coated Separator in Lithium–Sulfur Batteries