Porous hollow carbon nanospheres embedded with well-dispersed cobalt monoxide nanocrystals as effective polysulfide reservoirs for high-rate and long-cycle lithium–sulfur batteries

Wu, Shengxi; Wang, Yingze; Na, Shengsang; Chen, Chao-Jun; Yu, Tianzhi; Wang, Huanyun; Zang, Huimin

doi:10.1039/c7ta05120d

Cited by 34 publications

(28 citation statements)

References 54 publications

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“…The second strategy is to utilize oxides of transition metals with a myriad of possibilities to regulate the electronic structure, surface properties, and binding scenarios through d‐band engineering. These transition metal (hydro)oxides include Mn (MnO 2 , Mn 3 O 4 , and MnO), Fe (Fe 2 O 3 and Fe 3 O 4 ), Co (Co 3 O 4 , CoO, and Co(OH) 2 ), Ni (NiO and Ni(OH) x ), other transition metal‐based (VO 2 /V 2 O 5 , Nb 2 O 5 , etc Ni–Co/Fe LDH, and La 0.6 Sr 0.4 CoO 3− δ /Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3− δ perovskites) materials.…”

Section: Mediators In Li–s Batteriesmentioning

confidence: 99%

Heterogeneous/Homogeneous Mediators for High‐Energy‐Density Lithium–Sulfur Batteries: Progress and Prospects

Zhang

Peng

Zhao

et al. 2018

Adv Funct Materials

286

179

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Lithium-sulfur (Li-S) batteries deliver a high theoretical energy density of 2600 Wh kg −1 , and hold great promise to serve as a next-generation highenergy-density battery system. Great progress has been achieved in cathode design to deal with the intrinsic problems of sulfur cathodes, including low conductivity, the dissolution of polysulfide intermediate, and volume fluctuation. However, aiming at the practical applications of Li-S batteries, the weight percentage of sulfur in cathode materials and the overall areal sulfur loading need to be significantly increased, which inevitably complicate the process and cause heavy shuttle effect, slow redox kinetics, and more undesirable reaction pathways. Recently, rationally designing efficient mediators, as well as incorporating them into a working battery, emerges to be a promising method to construct high-energy-density Li-S batteries. The influence of mediators on Li-S batteries appears to be the enhancement in redox kinetics and the increase in reaction efficiency. In this feature article, the mechanistic understanding of redox kinetics in Li-S reactions is discussed, and then a comprehensive analysis of the recent advances in both heterogeneous and homogeneous mediator design is provided. A mediator perspective in building high-energy-density Li-S batteries is also included.

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Section: Mediators In Li–s Batteriesmentioning

confidence: 99%

Heterogeneous/Homogeneous Mediators for High‐Energy‐Density Lithium–Sulfur Batteries: Progress and Prospects

Zhang

Peng

Zhao

et al. 2018

Adv Funct Materials

286

179

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“…Nevertheless, some metal oxides, such as Fe 2 O 3 , Fe 3 O 4 , Co 3 O 4 , and CoO, with their redox potentials falling outside the Goldilocks voltage window, were still found by other groups to have the ability to promote the transformation of polysulfides. [153][154][155][156] Therefore, owing to the lack of direct evidence at a molecular level, the classification of these solid additives as adsorbents, heterogeneous mediators, and electrocatalysts, which are discussed next, varies in the literature. At present, it is difficult to accurately identify whether these solid additives would change the reaction pathways or lower the activation energy of polysulfide conversion reactions or do both after initial chemical adsorption.…”

Section: Ll Open Accessmentioning

confidence: 99%

Material design and structure optimization for rechargeable lithium-sulfur batteries

Guo

2021

Matter

136

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With the merits of low cost, abundant resources, environment friendliness, and high energy density, the Li-S battery is recognized as a promising alternative to the Li ion battery and is anticipated to play an important role in high-energy-density electrochemical storage systems. In this review, we first review the development process of Li-S batteries and briefly introduce the working principle of Li-S batteries. The scientific problems existing in the Li-S batteries, such as sulfur cathode, separator, electrolyte, and Li anode, and the corresponding countermeasures, are then summarized. Subsequently, main research advancements of Li-S batteries are comprehensively reviewed, and the critical concerns about commercialization of Li-S batteries are discussed. Finally, we give our perspectives on the development of high-performance Li-S batteries. We hope this review can provide the timely and comprehensive information on the future research direction of Li-S batteries and offer the guidance for material design and structure optimization of Li-S batteries.

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“…Modifying the carbon shell of HPCM with polar inorganic nanoparticles is a straightforward strategy . Wu and co‐workers decorated HPCS by embedding CoO nanoparticles into prefabricated HPCS (HPCS/CoO, Figure a) . Due to the chemical interaction between CoO and polysulfides, HPCS/CoO possesses a superior polysulfide adsorption capability in comparison to HPCS only.…”

Section: Sulfur Cathodes Based On Hollow Porous Carbon Materialsmentioning

confidence: 99%

Section: Sulfur Cathodes Based On Hollow Porous Carbon Materialsmentioning

confidence: 99%

Recent Advances in Hollow Porous Carbon Materials for Lithium–Sulfur Batteries

Wang

Pei

et al. 2019

Small

340

184

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Lithium–sulfur (Li–S) batteries are considered as one of the most potential next‐generation rechargeable batteries due to their high theoretical energy density. However, some critical issues, such as low capacity, poor cycling stability, and safety concerns, must be solved before Li–S batteries can be used practically. During the past decade, tremendous efforts have been devoted to the design and synthesis of electrode materials. Benefiting from their tunable structural parameters, hollow porous carbon materials (HPCM) remarkably enhance the performances of both sulfur cathodes and lithium anodes, promoting the development of high‐performance Li–S batteries. Here, together with the templated synthesis of HPCM, recent progresses of Li–S batteries based on HPCM are reviewed. Several important issues in Li–S batteries, including sulfur loading, polysulfide entrapping, and Li metal protection, are discussed, followed by a summary on recent research on HPCM‐based sulfur cathodes, modified separators, and lithium anodes. After the discussion on emerging technical obstacles toward high‐energy Li–S batteries, prospects for the future directions of HPCM research in the field of Li–S batteries are also proposed.

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Porous hollow carbon nanospheres embedded with well-dispersed cobalt monoxide nanocrystals as effective polysulfide reservoirs for high-rate and long-cycle lithium–sulfur batteries

Abstract: Lithium–sulfur (Li–S) batteries are promising energy storage systems owing to their high theoretical energy density and low costs due to the abundant reserves of sulfur.

Cited by 34 publications

References 54 publications

Heterogeneous/Homogeneous Mediators for High‐Energy‐Density Lithium–Sulfur Batteries: Progress and Prospects

Heterogeneous/Homogeneous Mediators for High‐Energy‐Density Lithium–Sulfur Batteries: Progress and Prospects

Material design and structure optimization for rechargeable lithium-sulfur batteries

Recent Advances in Hollow Porous Carbon Materials for Lithium–Sulfur Batteries

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