Reinforced polysulfide barrier by g-C3N4/CNT composite towards superior lithium-sulfur batteries

Wang, Xiangliang; Li, Gaoran; Li, Minjie; Liu, Ruiping; Li, Haibo; Li, Tengyu; Sun, Mingzhu; Deng, Yirui; Feng, Ming; Chen, Zhongwei

doi:10.1016/j.jechem.2020.05.036

Cited by 91 publications

(44 citation statements)

References 45 publications

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“…Considering the bonding of NLiS bridge, it could be reasonable to infer that the adjacent S preferred the relatively electropositive C site due to the dipolar–dipolar interaction. [ 31 ] Moreover, in the S 2p spectra, the intensity of S T to S B 0 was lower than 1:2 after being adsorbed with PS/sCN, since its BE region overlapped with an additional carbon‐bonded S B 0 species arising. [ 32 ] In addition, two pairs of new peaks located at 167.1 and 169.3 eV were referred to the sulfite and sulfate species emerged at the high BE range, [ 33 ] which manifested the interactions between Li 2 S 6 and the oxidic species on the surface of PS.…”

Section: Resultsmentioning

confidence: 99%

Defective Graphitic Carbon Nitride Modified Separators with Efficient Polysulfide Traps and Catalytic Sites for Fast and Reliable Sulfur Electrochemistry

Tong

Huang

Liu

et al. 2021

Adv Funct Materials

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The serious shuttle effect of lithium‐sulfur batteries limits the efficient realization of high rate charging and discharging under high sulfur loading in practical applications. Herein, this work reports a strong mitigation toward lithium polysulfide (LiPSs) adsorption/catalysis by introducing defective graphite phase carbon nitride (g‐C3N4) as an effective additive. Without significant weight increase, the nitrogen deficient g‐C3N4, in the form of ultrafine spindle‐like nitrogen deficient g‐C3N4−x (sCN), can be easily combined with commercial poly‐propylene (PP) separators after hydrophilic modification of polydopamine, which corresponds to an ultralow overall weightiness contribution of 0.17 mg cm−2. Physical/electrochemical characterizations and theoretical studies reveal that sCN exhibits strong electrostatic attraction with LiPSs by nitrogen defects and new formation of cyano groups near edges, thereby maintaining rapid and reliable LiS electrochemistry. Of particular importance is the chainmail catalyst design with separators that enable magic polysulfides adsorption effect and desirable thermostability/wettability, which guarantees the sCNPP‐assembled cells with long and stable durability over 500 cycles at 5.0 C (capacity fading rate: 0.05% per cycle), and a high capability of 476 mAh g−1 is obtained.

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Section: Resultsmentioning

confidence: 99%

Defective Graphitic Carbon Nitride Modified Separators with Efficient Polysulfide Traps and Catalytic Sites for Fast and Reliable Sulfur Electrochemistry

Tong

Huang

Liu

et al. 2021

Adv Funct Materials

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“…From Fig. 25b, c, A-G-Li delivered the highest reversible capacity and superior capacity [142] Interlayer for LIPs 1048 @ 100 cycles [180] retention (80%) in both battery tests (LIB and Li-S, respectively) [151].…”

Section: Lithium-metal Batteriesmentioning

confidence: 89%

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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“…It should be noted that the mass ration of g‐C 3 N 4 and rGO must be rationally controlled to balance the conductivity and LiPS immobilization capability. By a simple filtration process, g‐C 3 N 4 /CNTs composite [ 12 ] with interconnected network can be formed. 3D porous structure endowed composite with good flexibility, showing great prospects in flexible Li‐S batteries.…”

Section: Non‐metal Heteroatom Doped Materials As the Sulfur Hostsmentioning

confidence: 99%

“…[ 11 ] However, high N content also endows g‐C 3 N 4 with the intrinsic disadvantage of poor conductivity. [ 12 ] To solve the above problems, O, B, and P doped g‐C 3 N 4 materials have been proposed and shown promoted conductivity compared with undoped g‐C 3 N 4 . [ 13 ]…”

Section: Introductionmentioning

confidence: 99%

A Review of Heteroatom Doped Materials for Advanced Lithium–Sulfur Batteries

Wang

Han

2021

Adv Funct Materials

175

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High theoretical capacity and high energy density make lithium sulfur (Li‐S) batteries a competitive candidate for next‐generation energy storage systems. However, achieving the practical application of Li‐S batteries is still a huge challenge due to some inevitable obstacles. Poor conductivity of active sulfur, large volume expansion of cathode, and severe shuttle effect of lithium polysulfides (LiPSs) greatly limit the capacity of cells and lead to unsatisfied cycle performance. Therefore, various sulfur host materials have been proposed and investigated, which should possess good conductivity, porous structure, and strong immobilization capability for LiPSs. Unfortunately, it is incompetent to cover all the advantages mentioned above for pristine materials. Heteroatom doping fundamentally manipulates the electronic structure and polarity of materials, leading to some unprecedented properties, and subsequent enhancement in electrochemical performance. This review systematically summarizes the recent progress of heteroatom (metal single atom and non‐metal atom) doping in various materials including carbon materials, graphitic carbon nitride (g‐C3N4), and metal compounds as the ideal sulfur host. Furthermore, the relationship between the unique features of sulfur host materials originated from heteroatom doping and enhanced performance of cells is comprehensively discussed.

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Reinforced polysulfide barrier by g-C3N4/CNT composite towards superior lithium-sulfur batteries

Cited by 91 publications

References 45 publications

Defective Graphitic Carbon Nitride Modified Separators with Efficient Polysulfide Traps and Catalytic Sites for Fast and Reliable Sulfur Electrochemistry

Defective Graphitic Carbon Nitride Modified Separators with Efficient Polysulfide Traps and Catalytic Sites for Fast and Reliable Sulfur Electrochemistry

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

A Review of Heteroatom Doped Materials for Advanced Lithium–Sulfur Batteries

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