Co3O4 hollow microspheres on polypyrrole nanotubes network enabling long-term cyclability sulfur cathode

Wu, Jun; Dai, Yang; Pan, Zhijie; Huo, Dexuan; Wang, Ting; Zhang, Haiping; Ji, Hu; Yan, Sheng

doi:10.1016/j.apsusc.2020.145529

Cited by 38 publications

(19 citation statements)

References 55 publications

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“…As exhibited in Figures a and S11–S13, S/CR-Por-PPIs@800 composites have better electrochemical performances (discharging capacity, cycling stability, and capacity decay retention) compared to S/CR-Por-H-PPI, which declares their outstanding electrochemical advantage of conductive carbon-based and metal-doping hosts. In contrast to S/CR-Por-H-PPI@800 composites, metal-doping CR-Por-Cu/Co/Zn-PPIs@800 have superior cycling stabilities (higher discharging capacity and lower capacity decay rate) (Figures e,g and c), and we summarize the reasons as follows: first, the introduction of metal substances reduces the kinetic energy barrier (the early responding peak time of Li 2 S nucleation and decreased activation energy barrier E a ); , second, the existence of metal substances is conducive to the improvement of the catalytic effect and increases the reaction kinetics (larger Li 2 S nucleation capacity); and third, the presence of metal substances enhances the adsorption ability toward LiPSs (larger Li 2 S 6 trapping capacity). The above factors eventually achieve the kinetic equilibrium during adsorption–diffusion–conversion.…”

Section: Results and Discussionmentioning

confidence: 96%

Carbon-Based Conductive Frameworks and Metal Catalytic Sites Derived from Cross-Linked Porous Porphyrin-Based Polyimides for Enhanced Conversion of Lithium Polysulfides in Li–S Batteries

Lin

Xiong

et al. 2021

ACS Appl. Energy Mater.

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Shuttling behavior of lithium polysulfides (LiPSs) resulting from insufficient adsorption capacity, delayed diffusion, and sluggish catalytic kinetics severely hampers further exploitation of lithium−sulfur (Li−S) batteries. A reasonable and optimized composition of the cathodic host in Li−S batteries is an efficient approach to utilize polysulfides and impede their loss. The combination of the factors preferable porosity parameters, efficient electrical framework, and intrinsic catalytic sites achieves the kinetic equilibrium of adsorption−dispersion−conversion to significantly restrain the shuttling behavior of LiPSs. In this article, carbon-based metal-doping materials (CR-Por-PPIs@800) derived from cross-linked porous porphyrin-based polyimides are constructed by a few simple reaction steps, which are used as the cathode host in Li−S batteries. These well-fabricated materials exhibit excellent porosity parameters to adsorb LiPSs and limit their diffusion shuttle and afford a high-temperature-treated conductive carbon skeleton to accelerate charge/ion transfer and expedite LiPS diffusion. Besides, metal-based substances serve as catalytic sites to elevate the conversion reaction kinetics of LiPSs. By virtue of the superior kinetic equilibrium, including adsorption from the well-constructed carbon-based framework, diffusion in the conductive network, and conversion via efficient metal catalytic sites, these CR-Por-PPIs@800 sulfur cathodes exhibit excellent cycle stability (0.051−0.081% attenuation rate under a current of 1C) and superior rate behavior. Remarkably, CR-Por-Cu-PPI@800 maintains up to 520 mAh g −1 after 500 cycles at 1C.

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Section: Results and Discussionmentioning

confidence: 96%

Carbon-Based Conductive Frameworks and Metal Catalytic Sites Derived from Cross-Linked Porous Porphyrin-Based Polyimides for Enhanced Conversion of Lithium Polysulfides in Li–S Batteries

Lin

Xiong

et al. 2021

ACS Appl. Energy Mater.

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“…In comparison to COCNF, the single-component CNF and BCO catalyst is almost inactive for water oxidation and produced a negligible OER activity due to its rapid recombination of photoinduced electron−hole pairs and intrinsic low electronic conductivity. 39,40 As shown in Figure 3b, once CNF mechanically mixed with 5 wt % BCO, the obtained mixture of BCO and CNF (denoted as BCOCNF) showed a 1.6-and 24.6-fold OER rate increase in comparison to BCOPCN and CNF, respectively. Meanwhile, the turnover frequency (TOF) of COCNF reached 5.94 h −1 (Figure 3c), far higher than those of BCOCNF (1.06 h −1 ), BCOPCN (0.67 h −1 ), BCO (<0.1 h −1 ), and CNF (<0.1 h −1 ).…”

Section: ■ Results and Discussionmentioning

confidence: 97%

Co₃O₄ Nanocrystals with an Oxygen Vacancy-Rich and Highly Reactive (222) Facet on Carbon Nitride Scaffolds for Efficient Photocatalytic Oxygen Evolution

Zeng

Xia

et al. 2020

ACS Appl. Mater. Interfaces

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Oxygen evolution reaction (OER) with sluggish kinetics is the rate-determining step of water splitting, which dominates the solar-to-hydrogen fuel conversion efficiency. Herein, we constructed an oxygen vacancy-rich and highly reactive (222) facet in Co 3 O 4 nanocrystals anchored on carbon nitride nanofiber (CNF) by a solvothermal reduction method. The resulting Co 3 O 4 nanocrystals/CNF (COCNF) demonstrated a dramatically enhanced OER with a rate of 24.9 μmol/h under visible light, which is 124 times higher than that of CNF. This excellent catalytic activity of COCNF is based on a synergistic effect between its binary components for charge separation, oxygen vacancies for enhanced conductivity, and facet (222) exposure of Co 3 O 4 nanocrystals for improved heterogeneous kinetics. Density functional theory (DFT) calculations revealed the water oxidation mechanism at different facets and found that the formed oxygen vacancies lead to a reduction of the materials' bandgap. The correlation between Co 3 O 4 crystal facets and the inherent OER catalytic activities under acidic solution was in the order of ( 222) > ( 220) > (311).

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“…Less pronounced effects were reported for composites of TiO 2 in PEDOT (Liu et al 2020d). Microspheres of Co 3 O 4 embedded in PPy nanotubes served as hosts for sulfur in a lithium-sulfur battery (Wu et al 2020b). 0.034% capacitance loss per cycle were observed during 1900 cycles.…”

Section: Icps and Composites In Secondary Batteriesmentioning

confidence: 91%

Intrinsically conducting polymers and their combinations with redox-active molecules for rechargeable battery electrodes: an update

Kondratiev

Holze

2021

Chem. Pap.

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Intrinsically conducting polymers and their copolymers and composites with redox-active organic molecules prepared by chemical as well as electrochemical polymerization may yield active masses without additional binder and conducting agents for secondary battery electrodes possibly utilizing the advantageous properties of both constituents are discussed. Beyond these possibilities these polymers have found many applications and functions for various further purposes in secondary batteries, as binders, as protective coatings limiting active material corrosion, unwanted dissolution of active mass ingredients or migration of electrode reaction participants. Selected highlights from this rapidly developing and very diverse field are presented. Possible developments and future directions are outlined.

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Co3O4 hollow microspheres on polypyrrole nanotubes network enabling long-term cyclability sulfur cathode

Cited by 38 publications

References 55 publications

Carbon-Based Conductive Frameworks and Metal Catalytic Sites Derived from Cross-Linked Porous Porphyrin-Based Polyimides for Enhanced Conversion of Lithium Polysulfides in Li–S Batteries

Carbon-Based Conductive Frameworks and Metal Catalytic Sites Derived from Cross-Linked Porous Porphyrin-Based Polyimides for Enhanced Conversion of Lithium Polysulfides in Li–S Batteries

Co₃O₄ Nanocrystals with an Oxygen Vacancy-Rich and Highly Reactive (222) Facet on Carbon Nitride Scaffolds for Efficient Photocatalytic Oxygen Evolution

Intrinsically conducting polymers and their combinations with redox-active molecules for rechargeable battery electrodes: an update

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Co3O4 hollow microspheres on polypyrrole nanotubes network enabling long-term cyclability sulfur cathode

Cited by 38 publications

References 55 publications

Carbon-Based Conductive Frameworks and Metal Catalytic Sites Derived from Cross-Linked Porous Porphyrin-Based Polyimides for Enhanced Conversion of Lithium Polysulfides in Li–S Batteries

Carbon-Based Conductive Frameworks and Metal Catalytic Sites Derived from Cross-Linked Porous Porphyrin-Based Polyimides for Enhanced Conversion of Lithium Polysulfides in Li–S Batteries

Co3O4 Nanocrystals with an Oxygen Vacancy-Rich and Highly Reactive (222) Facet on Carbon Nitride Scaffolds for Efficient Photocatalytic Oxygen Evolution

Intrinsically conducting polymers and their combinations with redox-active molecules for rechargeable battery electrodes: an update

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Co₃O₄ Nanocrystals with an Oxygen Vacancy-Rich and Highly Reactive (222) Facet on Carbon Nitride Scaffolds for Efficient Photocatalytic Oxygen Evolution