Lightweight, free-standing 3D interconnected carbon nanotube foam as a flexible sulfur host for high performance lithium-sulfur battery cathodes

Ummethala, Raghunandan; Fritzsche, Martin; Jaumann, Tony; Balach, Juan; Oswald, Steffen; Nowak, R.; Sobczak, N.; Kaban, I.; Rümmeli, Mark H.; Giebeler, Lars

doi:10.1016/j.ensm.2017.04.004

Cited by 98 publications

(51 citation statements)

References 65 publications

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“…In this regard, carbon materials have been extensively investigated due to the merits of high conductivity, abundant pore structure, tunable surface properties, and light‐weight. Various sulfur/carbon composite materials have been explored with the use of porous carbon, graphene, carbon nanotubes, carbon fibers, and their hybrid materials, resulting in significantly improved electrochemical performances. More recently, considering the different chemical bonding nature of carbon (nonpolar) and polysulfides (polar), the relatively weak interactions between polysulfides and the sp 2 ‐structured carbon plane are considered to be insufficient to immobilize the migrating polysulfides.…”

Section: Introductionmentioning

confidence: 99%

Metal–Organic Frameworks (MOFs)‐Derived Nitrogen‐Doped Porous Carbon Anchored on Graphene with Multifunctional Effects for Lithium–Sulfur Batteries

Chen

Sun

Fang

et al. 2018

Adv Funct Materials

266

124

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Lithium-sulfur (Li-S) batteries are highly appealing for next-generation electrochemical energy storage owing to their high theoretical energy density, environmental friendliness, and low cost. However, the insulating nature of sulfur and migration of dissolved polysulfide intermediates lead to low active material utilization and fast capacity decay, which pose a significant challenge to their practical applications. Here, this paper reports a multifunctional carbon hybrid with metal-organic frameworks (MOFs)-derived nitrogen-doped porous carbon anchored on graphene sheets (NPC/G) serving as a sulfur host. On the one hand, the high surface area and nitrogen-doping of the carbon nanoparticles enable effective polysulfide immobilization through both physical confinement and chemical adsorption; on the other hand, the highly conductive graphene provides an interconnected conductive framework to facilitate fast electron transport, improving the sulfur utilization. As a result, the NPC/G-based sulfur cathode exhibits a high specific capacity of 1372 mAh g −1 with good cycling stability over 300 cycles. This approach provides a promising approach for the design of MOFs-derived carbon materials for high performance Li-S batteries.

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Section: Introductionmentioning

confidence: 99%

Metal–Organic Frameworks (MOFs)‐Derived Nitrogen‐Doped Porous Carbon Anchored on Graphene with Multifunctional Effects for Lithium–Sulfur Batteries

Chen

Sun

Fang

et al. 2018

Adv Funct Materials

266

124

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“…Massive efforts have been concentrated on cathode design to address the aforementioned challenges. Due to highly conductive matrix and tunable architectures, carbonaceous materials are commonly employed as sulfur hosts, which, to some extent, mitigates the notorious shuttling effect and boosts the electrochemical kinetics of sulfur species 11,12. Unfortunately, the nonpolar characteristic of pristine carbon host has made the diffusion of polysulfides propelled by the concentration gradient not effectively mitigated 13.…”

Section: Introductionmentioning

confidence: 99%

Highly Stable Lithium−Sulfur Batteries Promised by Siloxene: An Effective Cathode Material to Regulate the Adsorption and Conversion of Polysulfides

Wang

Zhou

Huang

et al. 2020

Adv Funct Materials

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Designing an appropriate cathode is still a challenge for lithium–sulfur batteries (LSBs) to overcome the polysulfides shuttling and sluggish redox reactions. Herein, 2D siloxene nanosheets are developed by a rational wet‐chemistry exfoliation approach, from which S@siloxene@graphene (Si/G) hybrids are constructed as cathodes in Li‐S cells. The siloxene possesses corrugated 2D Si backbone with abundant O grafted in Si6 rings and hydroxyl‐functionalized surface, which can effectively intercept polysulfides via synergistic effects of chemical trapping capability and kinetically enhanced polysulfides conversion. Theoretical analysis further reveals that siloxene can significantly elevate the adsorption energies and lower energy barrier for Li+ diffusion. The LSBs assembled with 2D Si/G hybrid cathodes exhibit greatly enhanced rate performance (919, 759, and 646 mAh g−1 at 4 C with sulfur loading of 1, 2.9, and 4.2 mg cm−2, respectively) and superb durability (demonstrated by 1000 cycles with an initial capacity of 951 mAh g−1 and negligible 0.032% decay rate at 1 C with sulfur loading of 4.2 mg cm−2). It is expected that the study presented here may open up a new vision toward developing high‐performance LSBs with siloxene for practical applications.

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“…Various strategies have been explored to address the aforementioned issues, including the use of S host materials (HMs), coated separators, interlayers, and electrolyte additives . To improve the electronic conductivity of S electrodes, various carbon‐based HMs, such as graphene, mesoporous carbon, carbon nanotubes, and carbon nanospheres, have been intensively examined. Moreover, these carbon HMs, with unique micron/nano architectures, not only mitigate the large volume expansion of S during lithiation but also suppress LiPSs dissolution.…”

Section: Introductionmentioning

confidence: 99%

“…[5,[7][8][9][10][11] Various strategies have been explored to address the aforementioned issues, including the use of Sh ost materials (HMs), [6,[12][13][14][15][16] coated separators, [17,18] interlayers, [19] and electrolyte additives. [20,21] To improvet he electronic conductivity of S electrodes, various carbon-based HMs, such as graphene, [22,23] mesoporousc arbon, [24,25] carbon nanotubes, [26,27] and carbon nanospheres, [28] have been intensively examined. Moreover, these carbon HMs, with unique micron/nano architectures,n ot only mitigate the largev olume expansion of Sd uringl ithiation but also suppress LiPSs dissolution.N evertheless, carbon cannotb ec onsidered an excellent HM because of its weak physicalc onfinement ability between polar LiPSs and nonpolar carbon.…”

Section: Introductionmentioning

confidence: 99%

Insight into the Anchoring and Catalytic Effects of VO₂ and VS₂ Nanosheets as Sulfur Cathode Hosts for Li–S Batteries

Wang

Zhao

et al. 2019

ChemSusChem

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Transition metal oxides and sulfides have been intensively investigated as host materials for the S cathode in lithium–sulfur (Li–S) batteries; however, the distinctions between them in battery operation have remained unclear. In this study, VO2 and VS2 nanosheets were systematically studied as host materials for Li–S batteries through theoretical calculations and experimental testing. First‐principles calculations demonstrated that VS2 showed more favorable properties, including the inherent semi‐metallic conductivity of VS2, moderate adsorption strength for Li2Sn, fast Li+ transport with a low diffusion barrier, and accelerated surface redox reactions with a low Li2S decomposition barrier. In comparison, the low electronic conductivity and strong adsorption strength of VO2 increased Li+ diffusion as well as Li2S decomposition barriers of the electrode, resulting in relatively poor rate capability and cycle stability. In experiments, the VS2@S electrode exhibited superior electrochemical performance compared with VO2@S, giving a large capacity of 713 mAh g−1 at 5 C and a low capacity fading rate of 0.13 % per cycle over 200 cycles at 1 C. The constructed relationships between S cathode and host materials could guide the future design of high‐performance S cathodes for Li–S batteries.

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Lightweight, free-standing 3D interconnected carbon nanotube foam as a flexible sulfur host for high performance lithium-sulfur battery cathodes

Cited by 98 publications

References 65 publications

Metal–Organic Frameworks (MOFs)‐Derived Nitrogen‐Doped Porous Carbon Anchored on Graphene with Multifunctional Effects for Lithium–Sulfur Batteries

Metal–Organic Frameworks (MOFs)‐Derived Nitrogen‐Doped Porous Carbon Anchored on Graphene with Multifunctional Effects for Lithium–Sulfur Batteries

Highly Stable Lithium−Sulfur Batteries Promised by Siloxene: An Effective Cathode Material to Regulate the Adsorption and Conversion of Polysulfides

Insight into the Anchoring and Catalytic Effects of VO₂ and VS₂ Nanosheets as Sulfur Cathode Hosts for Li–S Batteries

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Lightweight, free-standing 3D interconnected carbon nanotube foam as a flexible sulfur host for high performance lithium-sulfur battery cathodes

Cited by 98 publications

References 65 publications

Metal–Organic Frameworks (MOFs)‐Derived Nitrogen‐Doped Porous Carbon Anchored on Graphene with Multifunctional Effects for Lithium–Sulfur Batteries

Metal–Organic Frameworks (MOFs)‐Derived Nitrogen‐Doped Porous Carbon Anchored on Graphene with Multifunctional Effects for Lithium–Sulfur Batteries

Highly Stable Lithium−Sulfur Batteries Promised by Siloxene: An Effective Cathode Material to Regulate the Adsorption and Conversion of Polysulfides

Insight into the Anchoring and Catalytic Effects of VO2 and VS2 Nanosheets as Sulfur Cathode Hosts for Li–S Batteries

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Insight into the Anchoring and Catalytic Effects of VO₂ and VS₂ Nanosheets as Sulfur Cathode Hosts for Li–S Batteries