Coordinating Interface Polymerization with Micelle Mediated Assembly Towards Two‐Dimensional Mesoporous Carbon/CoNi for Advanced Lithium–Sulfur Battery

Huang, Zheng; Ma, Dongsheng; Nian, Pei; Zhou, Yu; Wang, Dong; Gong, X. G.; Wang, Zheng; Qin, Yuwen

doi:10.1002/smll.202207411

Cited by 7 publications

(6 citation statements)

References 48 publications

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“…Pan et al reported that the adsorption free energy of H atoms (Δ G H* ) of bimetallic CoFe@N–C (−0.561 eV) is lower than that of Fe@N–C (−0.603 eV) and Co@N–C (−0.623 eV), which justifies the improvement in the HER activity . Previous works have demonstrated that the adsorption energy between lithium polysulfides (Li 2 S 4 ) and CoFe is −17.63 eV by DFT, which is much higher than that of single metals Co (−3.11 eV) and Fe (−2.68 eV) and other Co-based metallic alloys (CoNi: −4.24 eV). − …”

Section: Introductionmentioning

confidence: 99%

Separator Modified by Carbon-Encapsulated CoFe Alloy Nanoparticles Supported on Carbon Nanotubes for Advanced Lithium–Sulfur Batteries

Shang,

Ma,

Zhang

et al. 2024

ACS Appl. Nano Mater.

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The commercialization of lithium−sulfur (Li−S) batteries still confronts great challenges due to the sluggish redox kinetics of sulfur and the shuttle effect of lithium polysulfides. Designing a highly active electrocatalyst is an effective strategy to address the problems caused by complex multistep reactions. Herein, a hybrid composite composed of nitrogen-doped carbonwrapped bimetallic cobalt−iron alloy nanoparticles (NC@CoFe) is derived from a Prussian blue analogue and multiwalled carbon nanotubes (CNTs), which is used as a functional coating on a separator for Li−S batteries. The cross-linked CNTs provide a robust and conductive network for quick charge transfer and sufficient active-site exposure, and the NC@CoFe nanoparticles demonstrate a strong ability for anchoring and catalytic conversion of lithium polysulfides. The specific discharge capacity of the cell with the NC@CoFe/CNT-modified separator can reach 865.4 mA h/g at 3.18 mA/cm 2 (0.5 C) and is 576.3 mA h/g after 300 cycles with a Coulombic efficiency of approximately 98.2%. The cells with a 7.4 mg/cm 2 sulfur loading display a remarkable capacity retention of 77.8% after 100 cycles. The electrocatalyst with functionalized carbonaceous adsorption and alloy nanoparticle catalysis holds substantial promise for advancing the commercialization of durable Li−S batteries.

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Section: Introductionmentioning

confidence: 99%

Separator Modified by Carbon-Encapsulated CoFe Alloy Nanoparticles Supported on Carbon Nanotubes for Advanced Lithium–Sulfur Batteries

Shang,

Ma,

Zhang

et al. 2024

ACS Appl. Nano Mater.

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“…The typical synthesis of mesoporous metal oxides usually includes two main steps: the formation of mesostructure using a metal precursor and template (hard-template or soft-template) and the subsequent high-temperature crystallization as well as template removal. − The hard-template method, similar to nanocasting, starts with infiltrating precursors into ordered mesoporous carbon or mesoporous silica (MCM-41, KIT-6, SBA-15) and then etching off the template to obtain the inverse mesostructure . Gu et al synthesized mesoporous ZrO 2 as a hard template, in which the surface-modified functional groups help to enhance the interaction between the template and the precursor.…”

Section: Introductionmentioning

confidence: 99%

A Novel Molten Salt Mediated Synthesis of Mesoporous Metal Oxides with High Crystallization

Ma,

Lu,

Zhou

et al. 2024

ACS Cent. Sci.

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The controlled synthesis of mesoporous metal oxides remains a great challenge because the uncontrolled assembly process and high-temperature crystallization can easily destroy the mesostructure. Herein, we develop a facile, versatile, low-cost, and controllable molten salt assisted assembly strategy to synthesize mesoporous metal oxides (e.g., CeO 2 , ZrO 2 , SnO 2 , Li 2 TiO 3 ) with high surface area (115−155 m 2 / g) and uniform mesopore size (3.0 nm). We find this molten salt mediated assembly enables the desolvation of the precursors and forms bare metal ions, enhances their coordination interaction with the surfactant, and promotes their assembly into a mesostructure. Furthermore, the molten salt assisted crystallization process can lower the collision probability of the target metal atom, inhibit its further growth into large crystals, and achieve a well-maintained mesostructure with high crystallization. Furthermore, this method can be expanded to synthesize various structured mesoporous metal oxides, including hollow spheres, nanotubes, and nanosheets by introducing the carbon template. The obtained mesoporous CeO 2 microspheres loaded with Cu species exhibit excellent antibacterial performance and superior catalytic activity for the hydrogenation of nitrophenol with high conversion and cycling stability.

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“…27 A bimetallic CoNi-anchored ordered mesoporous N-doped carbon nanosheet sandwiched graphene (mNC-CoNi@rGO) was also shown to restrict the shuttle effect considerably. 28 With a smaller deposition barrier and less polarization, the catalytic efficiency of Co facilitated the deposition of Li 2 S on Co particles. As a result, at 0.2C, the Co and porous graphite (Co@GC-PC) electrode achieved a good specific capacity of 790 mAh g −1 after 220 cycles.…”

Section: Introductionmentioning

confidence: 99%

“…A nickel-plated sulfur nanocomposite with excellent conductivity and electrocatalytic activity toward polysulfides was created using an electroless plating technique. , With a high discharge capacity of 1008 mAh g –1 , the electroless nickel-plated sulfur nanocomposite presented good reaction kinetics and electrochemical reversibility . A bimetallic CoNi-anchored ordered mesoporous N-doped carbon nanosheet sandwiched graphene (mNC-CoNi@rGO) was also shown to restrict the shuttle effect considerably . With a smaller deposition barrier and less polarization, the catalytic efficiency of Co facilitated the deposition of Li 2 S on Co particles.…”

Section: Introductionmentioning

confidence: 99%

Atomic V- and Co-Modified Ketjen Black–Sulfur Composite for High-Performance Lithium–Sulfur Batteries

Fazal

Eroğlu

Kilic

et al. 2023

ACS Appl. Energy Mater.

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In the present study, we encapsulated sulfur with atomic vanadium (V)- and cobalt (Co)-modified Ketjen black (VCKBS) to hinder the shuttle mechanism and enhance the redox kinetics in Li–S batteries. The synthesized composite provided plenty of interfacial active sites and assured smooth electron transfer, which assisted in attaining the balance of the enhanced catalytic activity due to Co and the adsorption ability mainly derived from V. Consequently, the Li–S cells having an optimized composition presented alleviated shuttle effect, enhanced sulfur utilization and conversion efficiency, and showed stable cycling performance and an outstanding rate performance with an initial capacity of 1329 mAh g–1, which was maintained as 1249 mAh g–1 after 100 cycles. Due to impressive experimental specific capacities, the system-level specific energies and energy densities were also predicted using the 1st and 100th discharge capacities. Compared to regular Ketjen black-based cathodes, VCKBS cathodes showed 1342 and 568% improvement in the system-level energy density and specific energy based on the 100th discharge capacities, respectively. This indicates that VCKBS cathodes synthesized in a facile manner are advantageous for higher sulfur loadings at electrolyte-depleted cells and represent a viable endeavor to develop highly stable Li–S batteries.

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Coordinating Interface Polymerization with Micelle Mediated Assembly Towards Two‐Dimensional Mesoporous Carbon/CoNi for Advanced Lithium–Sulfur Battery

Abstract: Scheme 1. Schematic illustration of the synthesis process of the mNC-CoNi@rGO nanosheet.

Cited by 7 publications

References 48 publications

Separator Modified by Carbon-Encapsulated CoFe Alloy Nanoparticles Supported on Carbon Nanotubes for Advanced Lithium–Sulfur Batteries

Separator Modified by Carbon-Encapsulated CoFe Alloy Nanoparticles Supported on Carbon Nanotubes for Advanced Lithium–Sulfur Batteries

A Novel Molten Salt Mediated Synthesis of Mesoporous Metal Oxides with High Crystallization

Atomic V- and Co-Modified Ketjen Black–Sulfur Composite for High-Performance Lithium–Sulfur Batteries

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