Conjugated cyclized-polyacrylonitrile encapsulated carbon nanotubes as core–sheath heterostructured anodes with favorable lithium storage

Liu, Qian; Xiao, Zongying; Cui, Xun; Deng, Shuyi; He, Qiming; Zhang, Qing; Lin, Zhiqun; Yang, Yingkui

doi:10.1039/d0ta12243b

Cited by 27 publications

(24 citation statements)

References 49 publications

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“…These flower-like particles further self-assembled into long-range ordered colloidal crystals during the reaction . The flower-like nanostructured PAN particles have shown improved performance compared to that of solid spherical particles in applications for sensors, catalysis, separation, and energy storage. ,− Meanwhile, their simple one-step synthesis during the polymerization reaction makes it promising for future large-scale industrial production. However, the formation process of the unique flower-like structure in a simple one-pot polymerization process has not been investigated.…”

Section: Introductionsupporting

confidence: 68%

Formation Mechanism of Flower-like Polyacrylonitrile Particles

et al. 2022

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Flower-like polyacrylonitrile (PAN) particles have shown promising performance for numerous applications, including sensors, catalysis, and energy storage. However, the detailed formation process of these unique structures during polymerization has not been investigated. Here, we elucidate the formation process of flower-like PAN particles through a series of in situ and ex situ experiments. We have the following key findings. First, lamellar petals within the flower-like particles were predominantly orthorhombic PAN crystals. Second, branching of the lamellae during the particle formation arose from PAN’s fast nucleation and growth on pre-existing PAN crystals, which was driven by the poor solubility of PAN in the reaction solvent. Third, the particles were formed to maintain a constant center-to-center distance during the reaction. The separation distance was attributed to strong electrostatic repulsion, which resulted in the final particles’ spherical shape and uniform size. Lastly, we employed the understanding of the formation mechanism to tune the PAN particles’ morphology using several experimental parameters including incorporating comonomers, changing temperature, adding nucleation seeds, and adjusting the monomer concentration. These findings provide important insights into the bottom-up design of advanced nanostructured PAN-based materials and controlled polymer nanostructure self-assemblies.

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Section: Introductionsupporting

confidence: 68%

Formation Mechanism of Flower-like Polyacrylonitrile Particles

et al. 2022

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“…The Raman spectrum of NHP@CNT-2 presents the higher intensities in both D and G bands compared to NHP due to the presence of CNTs. 30…”

Section: Resultsmentioning

confidence: 99%

“…In principle, the higher specific surface area and the greater pore volume would be more favorable for the electrolyte penetration and ion diffusion and hence, achieving high-rate lithium storage capability. 30…”

Section: Resultsmentioning

confidence: 99%

“…The Raman spectrum of NHP@CNT-2 presents the higher intensities in both D and G bands compared to NHP due to the presence of CNTs. 30 The chemical compositions of NHP and NHP@CNTs can be further verified by XPS. As shown in Fig.…”

Section: Papermentioning

confidence: 89%

“…29 Moreover, the poor electronic transport generally inhibits the full utilization of active sites, thus delivering low practical capacity. 30 To date, three strategies have been proposed to address the issue of low conductivity. Firstly, π-conjugation core units are covalently coupled into linear chains to improve the electronic delocalization ability.…”

Section: Introductionmentioning

confidence: 99%

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Integration of carbon nanotubes and azo-coupled redox-active polymers into core–shell structured cathodes with favorable lithium storage

Ma¹,

Dong²,

He³

et al. 2022

Mater. Adv.

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Thermal‐Cyclized Polyacrylonitrile Artificial Protective Layers Toward Stable Zinc Anodes for Aqueous Zinc‐Based Batteries

Yang,

Wang,

et al. 2024

Adv Funct Materials

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Aqueous Zn‐based batteries (AZBs) have appealed numerous attentions in the energy storage field due to their low cost, environmental friendliness and high safety. However, the Zn metal anode faces severe challenges of short cycle life because of the dendrite growth and side reactions, which hinders the practical application of AZBs. Herein, an artificial coating layer of cyclized polyacrylonitrile (cPAN) is designed on the Zn anode through spin‐coating and thermal treatment. The cPAN layer possesses abundant N‐containing groups and delocalized π‐conjugation structure, which endows the Zn anode with low nucleation barrier and homogeneous electric field. Benefiting from these synergetic advantages, the nucleation overpotential of Zn is remarkably decreased. Furthermore, no obvious byproduct is observed on the cPANZ‐Zn after cycling. As a result, the resultant cPANZ‐Zn anode delivers a long lifespan of 600 h and high reversibility. cPANZ‐Zn||MnO2 full cells are further assembled and exhibited stable cycling and high rate capability.

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Conjugated cyclized-polyacrylonitrile encapsulated carbon nanotubes as core–sheath heterostructured anodes with favorable lithium storage

Abstract: Redox-active conjugated polymers are the promising alternatives to inorganic electrode materials, whereas such organic electrodes usually suffer from low practical capacity, poor conductivity, high cost, and industrial incompatibility. Many commercial...

Cited by 27 publications

References 49 publications

Formation Mechanism of Flower-like Polyacrylonitrile Particles

Formation Mechanism of Flower-like Polyacrylonitrile Particles

Integration of carbon nanotubes and azo-coupled redox-active polymers into core–shell structured cathodes with favorable lithium storage

Thermal‐Cyclized Polyacrylonitrile Artificial Protective Layers Toward Stable Zinc Anodes for Aqueous Zinc‐Based Batteries

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