Cabbage-like nitrogen-doped graphene/sulfur composite for lithium-sulfur batteries with enhanced rate performance

Cui, Zhenqi; Mei, Tao; Yao, Jia; Hou, Baofei; Zhu, Xiang; Liu, Xinghang; Wang, Xianbao

doi:10.1016/j.jallcom.2018.04.234

Cited by 33 publications

(12 citation statements)

References 50 publications

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“…NG is generally obtained by the thermal annealing of graphene with mixed nitrogen source gas [ 56 , 74 , 77 , 78 ]. Zegeye et al used this method to obtain a nitrogen-doped three-dimensional reduced graphene oxide sulfur cathode (S@N-3D-rGO) ( Figure 4 a) [ 54 ].…”

Section: Heteroatom Doped Graphenementioning

confidence: 99%

Graphene-Based Nanomaterials as the Cathode for Lithium-Sulfur Batteries

2021

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The global energy crisis and environmental problems are becoming increasingly serious. It is now urgent to vigorously develop an efficient energy storage system. Lithium-sulfur batteries (LSBs) are considered to be one of the most promising candidates for next-generation energy storage systems due to their high energy density. Sulfur is abundant on Earth, low-cost, and environmentally friendly, which is consistent with the characteristics of new clean energy. Although LSBs possess numerous advantages, they still suffer from numerous problems such as the dissolution and diffusion of sulfur intermediate products during the discharge process, the expansion of the electrode volume, and so on, which severely limit their further development. Graphene is a two-dimensional crystal material with a single atomic layer thickness and honeycomb bonding structure formed by sp2 hybridization of carbon atoms. Since its discovery in 2004, graphene has attracted worldwide attention due to its excellent physical and chemical properties. Herein, this review summarizes the latest developments in graphene frameworks, heteroatom-modified graphene, and graphene composite frameworks in sulfur cathodes. Moreover, the challenges and future development of graphene-based sulfur cathodes are also discussed.

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Section: Heteroatom Doped Graphenementioning

confidence: 99%

Graphene-Based Nanomaterials as the Cathode for Lithium-Sulfur Batteries

2021

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“…[19] Guo et al reported a vesicle-like sulfur/reduced graphene oxide composites, exhibiting a discharge specific capacity of 600 mAh g À 1 after 150 cycles. [20] In addition, Walle et al prepared a flower-like molybdenum disulfide/carbon nanotubes as the sulfur host, which retained a capacity of 676 mAh g À 1 after 73 cycles at 0.5 C. [21] Those findings well demonstrate the potential of biomimetic structures for high-performance LiÀ S batteries.…”

Section: Introductionmentioning

confidence: 98%

“…Guo et al. reported a vesicle‐like sulfur/reduced graphene oxide composites, exhibiting a discharge specific capacity of 600 mAh g −1 after 150 cycles . In addition, Walle et al.…”

Section: Introductionmentioning

confidence: 99%

A Bio‐Inspired Structurally‐Responsive and Polysulfides‐Mobilizable Carbon/Sulfur Composite as Long‐Cycling Life Li−S Battery Cathode

et al. 2019

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High energy density Li−S battery has attracted wide attention because of its promising application in long driving‐range electric vehicles. However, the shuttle effect of polysulfides, electrical insulation and volume‐change of sulfur, remain great challenges. Herein, inspired from a natural mimosa pudica structure, we present a novel nanocomposite which consists of a mimosa pudica‐structured carbon matrix coating with sulfur. The biomimetic configuration is able to structurally‐respond to the volume‐change of sulfur during charge/discharge; and the carbon matrix provides a good conductivity for rapid electron transfer. The carbon/sulfur composite‐based Li−S batteries exhibit a good electrochemical performance including a stable capacity after 1000 cycles, along with a Coulombic efficiency as high as 99.6 %, and an excellent rate‐performance even after three rounds of measurements. In addition, the density function theory modeling is investigated, which confirms the adsorption effect of carbon towards the polysulfides including Li2S4, Li2S6, and Li2S8, enabling a long‐term cycling stability.

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“…Recently, TiC has been considered for use in energy storage due to its outstanding characteristics ( Liu et al, 2018 ; Cui et al, 2019 ; Cai et al, 2020 ; Geng et al, 2021 ). Specifically, in an Li–S battery, the synthesized TiC can be used to enhance the cycling performance through the strong polar binding interactions with sulfur species and can better suppress the diffusion of lithium polysulfides (LiPS) compared with other materials ( Zhang et al, 2016 ; Cui et al, 2018 ; Zhang et al, 2018 ; Zhang et al, 2019 ). The strong chemical sorption and high electrical conductivity make it an ideal sulfur host for Li–S batteries.…”

Section: Introductionmentioning

confidence: 99%

Taming Polysulfides in an Li–S Battery With Low-Temperature One-step Chemical Synthesis of Titanium Carbide Nanoparticles From Waste PTFE

et al. 2021

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In this work, titanium carbide (TiC) nanoparticles have been successfully synthesized at much lower temperatures of 500°C using cheaper starting materials, such as waste polytetrafluoroethylene (PTFE) (carbon source) and titanium and metallic sodium, than the traditional carbothermal reduction of TiO2 at 1,800°C. An XRD pattern proved the formation of face-centered cubic TiC, and TEM images showed the obtained TiC nanoparticles with an average size of approximately 50 nm. In addition, the separator coated with TiC nanoparticles as an active material of interlayer effectively mitigates the shuttling problem by taming the polysulfides in Li–S batteries compared with a traditional celgard separator. The assembled cell realizes good cycling stability with 501 mAh g−1 and a low capacity fading of 0.1% per cycle after 300 cycles at 1 C due to high utilization of the sulfur-based active species.

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Cabbage-like nitrogen-doped graphene/sulfur composite for lithium-sulfur batteries with enhanced rate performance

Cited by 33 publications

References 50 publications

Graphene-Based Nanomaterials as the Cathode for Lithium-Sulfur Batteries

Graphene-Based Nanomaterials as the Cathode for Lithium-Sulfur Batteries

A Bio‐Inspired Structurally‐Responsive and Polysulfides‐Mobilizable Carbon/Sulfur Composite as Long‐Cycling Life Li−S Battery Cathode

Taming Polysulfides in an Li–S Battery With Low-Temperature One-step Chemical Synthesis of Titanium Carbide Nanoparticles From Waste PTFE

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