Kinetically elevated redox conversion of polysulfides of lithium-sulfur battery using a separator modified with transition metals coordinated g‑C3N4 with carbon-conjugated

Chen, Manfang; Zhao, Xiaomei; Li, Yongfang; Zeng, Peng; Liu, Hong; Yu, Hao; Wu, Ming C.; Li, Zhihao; Shao, Dingsheng; Miao, Changqin; Chen, Gairong; Shu, Hongbo; Pei, Yong; Wang, Xianyou

doi:10.1016/j.cej.2019.123905

Cited by 106 publications

(65 citation statements)

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“…The battery polarization potential is only 55 mV with HFPP additive, and it is much smaller than that of the cell with HFPN-free electrolyte (67 mV), showing the enhanced redox reaction kinetics of polysulfide because of the addition of HFPP in the electrolyte. [37][38] The intensities of the peaks for the cell with HFPP-containing electrolyte are much higher than those for the cell without HFPP. Moreover, the almost overlapping CV curves during the first 4 charge/discharge cycles show the reversible electrochemical characteristics.…”

Section: Resultsmentioning

confidence: 97%

A Stable Fluorine‐Containing Solid Electrolyte Interface toward Dendrite‐Free Lithium‐Metal Anode for Lithium‐Sulfur Batteries

et al. 2021

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Lithium-sulfur (LiÀ S) batteries are considered to be a representative of the next generation of lithium-ion batteries due to their high theoretical specific capacity (2600 Wh • Kg À 1 ), and they have been extensively researched. However, the formation of lithium dendrites during the discharge process continuously consumes the electrolyte and the lithium anode, resulting in an increase in the cell's internal resistance and a capacity loss. Herein, we added an organic-inorganic polymer hexafluorocyclo-triphosphazene (HFPP) to the electrolyte, which showed lower interfacial resistance and more effective lithium-ion deposition. The lone-pair electrons of the nitrogen atoms in HFPP promote the uniform diffusion of lithium ions and its 2D structure also enhances the mechanical stability of the solid electrolyte interphase (SEI) and inhibits the formation of lithium dendrites. Based on the regulating effect, the cells using HFPP as electrolyte additives showed an excellent discharge capacity of 1095 mAh • g À 1 at 0.5 C and a reversible capacity of 763 mAh • g À 1 after 200 cycles, indicating that HFPP is an effective additive for the protection of the lithium anode and cycling stability of LiÀ S batteries.

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Section: Resultsmentioning

confidence: 97%

A Stable Fluorine‐Containing Solid Electrolyte Interface toward Dendrite‐Free Lithium‐Metal Anode for Lithium‐Sulfur Batteries

et al. 2021

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“…9 f) [ 56 ]. Chen et al studied the effect of transition metal (Fe, Ni, Cu, and Co)-doped g-C 3 N 4 /C composite for Li–S battery and showed that this would increase the electron mobility, while g-C 3 N 4 will prevent polysulfide dissolution by anchoring LiPSs species [ 69 ]. In summary, DFT has been very key in the synthesis and electrochemical study of carbon nitrides for metal-ion batteries.…”

Section: Dft-guided Studies Of Cnbms For Energy Storage Devicesmentioning

confidence: 99%

“…b Schematic illustration of the M-C 3 N 4 /Cmodified separator to suppress the shuttle of polysulfides and expedite conversion reaction kinetics of polysulfides. Reproduced with permission from Ref [69]…”

mentioning

confidence: 99%

DFT-Guided Design and Fabrication of Carbon-Nitride-Based Materials for Energy Storage Devices: A Review

et al. 2020

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Carbon nitrides (including CN, C2N, C3N, C3N4, C4N, and C5N) are a unique family of nitrogen-rich carbon materials with multiple beneficial properties in crystalline structures, morphologies, and electronic configurations. In this review, we provide a comprehensive review on these materials properties, theoretical advantages, the synthesis and modification strategies of different carbon nitride-based materials (CNBMs) and their application in existing and emerging rechargeable battery systems, such as lithium-ion batteries, sodium and potassium-ion batteries, lithium sulfur batteries, lithium oxygen batteries, lithium metal batteries, zinc-ion batteries, and solid-state batteries. The central theme of this review is to apply the theoretical and computational design to guide the experimental synthesis of CNBMs for energy storage, i.e., facilitate the application of first-principle studies and density functional theory for electrode material design, synthesis, and characterization of different CNBMs for the aforementioned rechargeable batteries. At last, we conclude with the challenges, and prospects of CNBMs, and propose future perspectives and strategies for further advancement of CNBMs for rechargeable batteries.

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“…Nevertheless, several chall e ng i ng i s s u e s s t i l l h i nd e r t he s uc c e s s f ul commercialization of Li-S batteries. One significant problem that has plagued the commercialization of Li-S batteries is the continuous and rapid capacity fading of the cell, which arises due to the unique characteristics of polysulfide (PS) [6][7][8][9][10]. High-order polysulfide (h-PS, Li 2 S x , 4 ≤ x ≤ 8) is quite soluble in electrolyte, so it easily passivates on the lithium metal (Li) anode through a chemical conversion reac-tion of h-PS to Li 2 S and this causes serious amounts of active material loss.…”

Section: Introductionmentioning

confidence: 99%

Ionic Additives to Increase Electrochemical Utilization of Sulfur Cathode for Li-S Batteries

Seong

Yim

2021

J. Electrochem. Sci. Technol

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The high theoretical specific capacity of lithium-sulfur (Li-S) batteries makes them a more promising energy storage system than conventional lithium-ion batteries (LIBs). However, the slow kinetics of the electrochemical conversion reaction seriously hinders the utilization of Li-S as an active battery material and has prevented the successful application of Li-S cells. Therefore, exploration of alternatives that can overcome the sluggish electrochemical reaction is necessary to increase the performance of Li-S batteries. In this work, an ionic liquid (IL) is proposed as a functional additive to promote the electrochemical reactivity of the Li-S cell. The sluggish electrochemical reaction is mainly caused by precipitation of low-order polysulfide (l-PS) onto the positive electrode, so the IL is adopted as a solubilizer to remove the precipitated l-PS from the positive electrode to promote additional electron transfer reactions. The ILs effectively dissolve l-PS and greatly improve the electrochemical performance by allowing greater utilization of l-PS, which results in a higher initial specific capacity, together with a moderate retention rate. The results presented here confirmed that the use of an IL as an additive is quite effective at enhancing the overall performance of the Li-S cell and this understanding will enable the construction of highly efficient Li-S batteries.

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Kinetically elevated redox conversion of polysulfides of lithium-sulfur battery using a separator modified with transition metals coordinated g‑C3N4 with carbon-conjugated

Cited by 106 publications

References 50 publications

A Stable Fluorine‐Containing Solid Electrolyte Interface toward Dendrite‐Free Lithium‐Metal Anode for Lithium‐Sulfur Batteries

A Stable Fluorine‐Containing Solid Electrolyte Interface toward Dendrite‐Free Lithium‐Metal Anode for Lithium‐Sulfur Batteries

DFT-Guided Design and Fabrication of Carbon-Nitride-Based Materials for Energy Storage Devices: A Review

Ionic Additives to Increase Electrochemical Utilization of Sulfur Cathode for Li-S Batteries

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