Improving electrochemical properties of Lithium–Sulfur batteries by adding a catalyst-embedded interlayer

Cho, Sung Ho; Bae, Ki Yoon; Kim, Byung Hyuk; Son, Byung Dae; Yoon, Woo Young

doi:10.1016/j.electacta.2019.05.062

Cited by 16 publications

(8 citation statements)

References 44 publications

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“…When comparing the peak potentials of these four cells, it is obvious that the cell with P-CoS 2 /CNTs@Celgard has the lowest potential hysteresis and then followed by CoS 2 /CNTs@Celgard, CNTs@Celgard, and Celgard. The result suggests that the P-CoS 2 /CNT layer reduces the polarization and promotes the sulfur redox kinetics during the charge/discharge processes. , As shown in Figure b, symmetric cells assembled with P-CoS 2 or CoS 2 electrodes were tested under the polarization of 1.0 V. The polarization profile of the symmetric cell with P-CoS 2 presents enhanced response current, suggesting the superior catalytic activity for polysulfides. , The reason for such improved catalytic activity is that phosphorus doping can create electron-rich surface sites in CoS 2 , which can stretch the S–S bonds of polysulfides to promote the bond cleavage in the discharge process Figure c,d shows that there are almost no peak shifts except for the first cycle in the symmetric cell with P-CoS 2 in contrast to that with CoS 2 , illustrating that the polysulfide conversion in the P-CoS 2 /Li 2 S 6 chemistry is completely reversible and highly stable …”

Section: Resultsmentioning

confidence: 97%

“…58,59 As shown in Figure 4b, symmetric cells assembled with P-CoS 2 or CoS 2 electrodes were tested under the polarization of 1.0 V. The polarization profile of the symmetric cell with P-CoS 2 presents enhanced response current, suggesting the superior catalytic activity for polysulfides. 60,61 The reason for such improved catalytic activity is that phosphorus doping can create electron-rich surface sites in CoS 2 , which can stretch the S−S bonds of polysulfides to promote the bond cleavage in the discharge process. 37 Figure 4c,d shows that there are almost no peak shifts except for the first cycle in the symmetric cell with P-CoS 2 in contrast to that with CoS 2 , illustrating that the polysulfide conversion in the P-CoS 2 /Li 2 S 6 chemistry is completely reversible and highly stable.…”

Section: Resultsmentioning

confidence: 99%

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Phosphorus-Doped Metal–Organic Framework-Derived CoS₂ Nanoboxes with Improved Adsorption-Catalysis Effect for Li–S Batteries

Liu

Qiao

Xie

et al. 2021

ACS Appl. Mater. Interfaces

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Lithium−sulfur (Li−S) batteries are regarded as one of the most promising next-generation battery technologies owing to their ultrahigh energy density up to 2600 W h kg −1 and low cost. However, major challenges still remain in the application of Li−S batteries, such as shuttle effect and sluggish redox kinetics. Herein, it is demonstrated that phosphorus doping can not only significantly improve the polysulfide adsorption but also enhance the catalysis effects of metal−organic framework-derived CoS 2 nanoboxes in Li−S batteries. Consequently, a modified separator integrated with P−CoS 2 and carbon nanotubes effectively suppresses the polysulfide shuttle and propels the redox kinetics of polysulfides, thus promising higher specific discharge capacity, better rate, and stable cycle performance. Even under the high sulfur loading condition (4.8 mg cm −2 ), the areal discharge capacity of the cell with the functional separator can still remain at 4.5 mA h cm −2 after 100 cycles at 0.2 C. More importantly, this work may encourage more effort on anion doping for engineering the polar surface of transition-metal compounds to further mediate the interfacial redox chemistry between transition-metal compounds and polysulfides in Li−S batteries.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Phosphorus-Doped Metal–Organic Framework-Derived CoS₂ Nanoboxes with Improved Adsorption-Catalysis Effect for Li–S Batteries

Liu

Qiao

Xie

et al. 2021

ACS Appl. Mater. Interfaces

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“…In addition, a flexible Li–S battery should maintain high performance even under a bent, folded, or stretched state. , This requires all components in the flexible cells to withstand repeated mechanical deformation. Significant effort has been expended in the development of various flexible sulfur cathodes. − Functional interlayers are developed for protecting cathodes by reducing the shuttle effect of the polysulfides (PSs). − Among them, − the functionalized boron nitride nanosheets/graphene (FBN/G) interlayer effectively reduces the charge transfer resistance and inhibits the shuttle effect of polysulfides . On the other hand, all-in-one strategies have also been developed to fabricate flexible Li–S batteries .…”

mentioning

confidence: 99%

“…In this work, following our previous research in advanced lithium anodes and sulfur cathodes, ,, we developed a flexible Li–S full cell based on an ultrastable lithium cloth anode, a PSU-functionalized separator, and a free-standing graphene/sulfur cathode protected by an FBN/G interlayer, enabling both exceptionally higher mechanical flexibility and energy density. The excellent mechanical property of the carbon cloth and 3D hierarchical nanostructure networks on the carbon cloth contribute greatly to the flexibility and stability of lithium cloth electrodes.…”

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confidence: 99%

An Ultra-Long-Life Flexible Lithium–Sulfur Battery with Lithium Cloth Anode and Polysulfone-Functionalized Separator

Fan

Mateti

et al. 2020

ACS Nano

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Flexible and high-performance batteries are urgently required for powering flexible/wearable electronics. Lithium−sulfur batteries with a very high energy density are a promising candidate for high-energy-density flexible power source. Here, we report flexible lithium−sulfur full cells consisting of ultrastable lithium cloth anodes, polysulfone-functionalized separators, and freestanding sulfur/graphene/boron nitride nanosheet cathodes. The carbon cloth decorated with lithiophilic three-dimensional MnO 2 nanosheets not only provides the lithium anodes with an excellent flexibility but also limits the growth of the lithium dendrites during cycling, as revealed by theoretical calculations. Commercial separators are functionalized with polysulfone (PSU) via a phase inversion strategy, resulting in an improved thermal stability and smaller pore size. Due to the synergistic effect of the PSU-functionalized separators and boron nitride−graphene interlayers, the shuttle of the polysulfides is significantly inhibited. Because of successful control of the shuttle effect and dendrite formation, the flexible lithium−sulfur full cells exhibit excellent mechanical flexibility and outstanding electrochemical performance, which shows a superlong lifetime of 800 cycles in the folded state and a high areal capacity of 5.13 mAh cm −2 . We envision that the flexible strategy presented herein holds promise as a versatile and scalable platform for large-scale development of high-performance flexible batteries.

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“…In addition to combining with graphene, some researchers also combined MWCNTs with polar materials such as metal oxides Kong et al, 2018;Li et al, 2019b), metal sulfides (Li et al, 2018;Wang L. et al, 2018), and metal catalyst (Cho et al, 2019;Ding et al, 2019), which could have produced strong chemical interactions with polysulfides. For instance integrated a multicomponent sandwich structure interlayer as freestanding interlayer inserting between the sulfur cathode and separator, and the Li-S cell has been displayed outstanding electrochemical performance.…”

Section: Mwcnts-based Compositesmentioning

confidence: 99%

Application of Carbon Nanotube-Based Materials as Interlayers in High-Performance Lithium-Sulfur Batteries: A Review

et al. 2020

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With the ever-increasing demands of electrochemical energy storage, lithium-sulfur (Li-S) batteries have drawn more attention because of their superior theoretical energy density and high specific capacity. However, practical applications of Li-S batteries suffer from problems such as low conductivity of sulfur and discharged products, severe polysulfide shuttling effect, and large volume change of sulfur during cycling, resulting in sluggish rate performance, and unsatisfactory cycle life. Various nanostructured carbon materials have been served as barrier layers to overcome these problems. In particular, carbon nanotubes (CNTs) with unique 1D nanostructure, have been introduced to Li-S batteries as the intermediate layers because of its superior flexibility, excellent electrical conductivity, and good chemical stability. Moreover, CNTs and CNTs-based barrier layers could also curb lithium polysulfides shuttling. In the minireview, we summarize recent works of CNTs-based materials as modifying interlayers for Li-S batteries. In addition, the strategies to enhance electrochemical performances of the batteries are summarized and discussed. Finally, the challenges and prospects for future research of CNTs-based materials as interlayer are proposed. We hope this review will be useful for designing and fabricating high-performance Li-S batteries and boost their practical applications.

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Improving electrochemical properties of Lithium–Sulfur batteries by adding a catalyst-embedded interlayer

Cited by 16 publications

References 44 publications

Phosphorus-Doped Metal–Organic Framework-Derived CoS₂ Nanoboxes with Improved Adsorption-Catalysis Effect for Li–S Batteries

Phosphorus-Doped Metal–Organic Framework-Derived CoS₂ Nanoboxes with Improved Adsorption-Catalysis Effect for Li–S Batteries

An Ultra-Long-Life Flexible Lithium–Sulfur Battery with Lithium Cloth Anode and Polysulfone-Functionalized Separator

Application of Carbon Nanotube-Based Materials as Interlayers in High-Performance Lithium-Sulfur Batteries: A Review

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Improving electrochemical properties of Lithium–Sulfur batteries by adding a catalyst-embedded interlayer

Cited by 16 publications

References 44 publications

Phosphorus-Doped Metal–Organic Framework-Derived CoS2 Nanoboxes with Improved Adsorption-Catalysis Effect for Li–S Batteries

Phosphorus-Doped Metal–Organic Framework-Derived CoS2 Nanoboxes with Improved Adsorption-Catalysis Effect for Li–S Batteries

An Ultra-Long-Life Flexible Lithium–Sulfur Battery with Lithium Cloth Anode and Polysulfone-Functionalized Separator

Application of Carbon Nanotube-Based Materials as Interlayers in High-Performance Lithium-Sulfur Batteries: A Review

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Phosphorus-Doped Metal–Organic Framework-Derived CoS₂ Nanoboxes with Improved Adsorption-Catalysis Effect for Li–S Batteries

Phosphorus-Doped Metal–Organic Framework-Derived CoS₂ Nanoboxes with Improved Adsorption-Catalysis Effect for Li–S Batteries