Atomic Layer Deposition-Assisted Construction of Binder-Free Ni@N-Doped Carbon Nanospheres Films as Advanced Host for Sulfur Cathode

Liu, Jun; Wei, Aixiang; Pan, Guoxiang; Xiong, Qinqin; Chen, Fang; Shen, Shenghui; Xia, Xinhui

doi:10.1007/s40820-019-0295-8

Cited by 18 publications

(12 citation statements)

References 44 publications

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“…An effective strategy to solve this problem is to assemble transition metal sulfides on conductive twodimensional network to form composite structure, which can improve the stability of transition metal sulfides and enhance their adsorption and catalytic capabilities. MXene (MX) is a new two-dimensional transition metal carbon/ nitride with the advantage of good conductivity, abundant surface functional groups and numerous active sites, which makes it one of the ideal separator modification materials for Li-S battery [18,[33][34][35][36]. Yang et al proposed Ti 3 C 2 T x composite GO as separator modification material and studied the ability of two different two-dimensional materials composite to block, capture and catalyze LiPSs [37].…”

Section: Introductionmentioning

confidence: 99%

Multi-Dimensional Composite Frame as Bifunctional Catalytic Medium for Ultra-Fast Charging Lithium–Sulfur Battery

et al. 2022

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The shuttle effect of soluble lithium polysulfides (LiPSs) between electrodes and slow reaction kinetics lead to extreme inefficiency and poor high current cycling stability, which limits the commercial application of Li–S batteries. Herein, the multi-dimensional composite frame has been proposed as the modified separator (MCCoS/PP) of Li–S battery, which is composed of CoS2 nanoparticles on alkali-treated MXene nanosheets and carbon nanotubes. Both experiments and theoretical calculations show that bifunctional catalytic activity can be achieved on the MCCoS/PP separator. It can not only promote the liquid–solid conversion in the reduction process, but also accelerate the decomposition of insoluble Li2S in the oxidation process. In addition, LiPSs shuttle effect has been inhibited without a decrease in lithium-ion transference numbers. Simultaneously, the MCCoS/PP separator with good LiPSs adsorption capability arouses redistribution and fixing of active substances, which is also beneficial to the rate performance and cycling stability. The Li–S batteries with the MCCoS/PP separator have a specific capacity of 368.6 mAh g−1 at 20C, and the capacity decay per cycle is only 0.033% in 1000 cycles at 7C. Also, high area capacity (6.34 mAh cm−2) with a high sulfur loading (7.7 mg cm−2) and a low electrolyte/sulfur ratio (7.5 μL mg−1) is achieved.

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Section: Introductionmentioning

confidence: 99%

Multi-Dimensional Composite Frame as Bifunctional Catalytic Medium for Ultra-Fast Charging Lithium–Sulfur Battery

et al. 2022

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“…Secondly, poor ionic and electronic conductivities of sulfur and the discharged product polysulfides (Li 2 S x ) increase the internal resistance of the battery, leading to poor high-rate performance. In addition, the adverse "shuttle effect" caused by the dissolution and diffusion of reaction intermediate polysulfides in organic electrolytes will cause capacity fading and low coulombic efficiency [10][11][12]. In such a context, new sulfur cathode host materials should be taken to overcome these problems.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of sulfur@titanium carbide Mxene as high performance cathode for lithium-sulfur batteries

et al. 2020

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AbstractThe design of sulfur hosts with polar, sulfurphilic, and conductive network is critical to lithium-sulfur (Li-S) batteries whose potential applications are greatly limited by the lithium polysulfide shuttle effect. Mxenes, possessing layered-stacked structures and high electrical conductivities, have a great potential in sulfur hosts. Herein, sulfur nanoparticles uniformly decorated on titanium carbide Mxene (S@Ti3C2Tx Mxene) are synthesized via a hydrothermal method and then utilized as a cathode for lithium-sulfur batteries. This unique architecture could accommodate sulfur nanoparticles expansion during cycling, suppress the shuttling of lithium polysulfide, and enhance electronical conductivity. Consequently, the S@Mxene with a high areal sulfur loading (∼4.0 mg cm−2) exhibits a high capacity (1477.2 mAh g−1) and a low capacity loss per cycle of 0.18% after 100 cycles at 0.2 C. This work may shed lights on the development of high performance sulfur-based cathode materials for Li-S batteries.

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“…Simultaneously, the O 1 s spectrum of NPP can be divide into two peaks, associated with the C = O and C–O–H/C–O–C bonds, respectively (Fig. S1c) [ 26 , 33 ]. As for the FT-IR spectra of NPP (Fig.…”

Section: Resultsmentioning

confidence: 99%

A Natural Polymer Captor for Immobilizing Polysulfide/Polyselenide in Working Li–SeS2 Batteries

et al. 2021

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SeS2 has become a promising cathode material owing to its enhanced electrical conductivity over sulfur and higher theoretical specific capacity than selenium; however, the working Li–SeS2 batteries have to face the practical challenges from the severe shuttling of soluble dual intermediates of polysulfide and polyselenide, especially in high-SeS2-loading cathodes. Herein, a natural organic polymer, Nicandra physaloides pectin (NPP), is proposed to serve as an effective polysulfide/polyselenide captor to address the shuttling issues. Informed by theoretical calculations, NPP is competent to provide a Lewis base-based strong binding interaction with polysulfides/polyselenides via forming lithium bonds, and it can be homogeneously deposited onto a three-dimensional double-carbon conductive scaffold to finally constitute a polysulfide/polyselenide-immobilizing interlayer. Operando spectroscopy analysis validates the enhanced polysulfide/polyselenide trapping and high conversion efficiency on the constructed interlayer, hence bestowing the Li–SeS2 cells with ultrahigh rate capability (448 mAh g−1 at 10 A g−1), durable cycling lifespan (≈ 0.037% capacity attenuation rate per cycle), and high areal capacity (> 6.5 mAh cm−2) at high SeS2 loading of 15.4 mg cm−2. Importantly, pouch cells assembled with this interlayer exhibit excellent flexibility, decent rate capability with relatively low electrolyte-to-capacity ratio, and stable cycling life even under a low electrolyte condition, promising a low-cost, viable design protocol toward practical Li–SeS2 batteries.

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Atomic Layer Deposition-Assisted Construction of Binder-Free Ni@N-Doped Carbon Nanospheres Films as Advanced Host for Sulfur Cathode

Cited by 18 publications

References 44 publications

Multi-Dimensional Composite Frame as Bifunctional Catalytic Medium for Ultra-Fast Charging Lithium–Sulfur Battery

Multi-Dimensional Composite Frame as Bifunctional Catalytic Medium for Ultra-Fast Charging Lithium–Sulfur Battery

Facile synthesis of sulfur@titanium carbide Mxene as high performance cathode for lithium-sulfur batteries

A Natural Polymer Captor for Immobilizing Polysulfide/Polyselenide in Working Li–SeS2 Batteries

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