Nafion- and aquivion-based nanocomposites containing detonation nanodiamonds

Постнов, В. Н.; Mel’nikova, N. A.; Shulmeister, G. A.; Новиков, А. Г.; Murin, I. V.; Zhukov, A. N.

doi:10.1134/s1070363217110391

Cited by 16 publications

(8 citation statements)

References 9 publications

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“…Thus, the system of Sb 2 S 3 /SnS 2 /C heterojunction composites in the NaPF 6 -diglyme electrolyte was chosen for the following indepth measurements. According to previous reports, a nanodiamond is characterized by a large specific surface area and chemical inertness; as such, ions can easily adsorb on its surface and form a stable SEI film, thus reducing the occurrence of side reactions [34][35][36][37]. Here, the nanodiamond dispersion with a mass content of 5% was used to modify the separator, which not only helped increase the amount of electrolyte adsorbed but also maintained the integrity of the separator.…”

Section: Resultsmentioning

confidence: 99%

Hierarchical Sb2S3/SnS2/C heterostructure with improved performance for sodium-ion batteries

Jia

Shen

et al. 2022

Sci. China Mater.

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Metal sulfides are promising anode materials for sodium-ion batteries (SIBs) because of their high theoretical capacities. However, they are usually limited by their poor cycling performance and rate properties due to their large volume expansion and sluggish reaction kinetics. Herein, Sb 2 S 3 /SnS 2 /C heterostructures were fabricated by directly growing SnS 2 nanoplates on Sb 2 S 3 nanorods and then coating their surface with a carbon layer. Sodium-ion diffusion in several electrodes and different electrolytes was further evaluated to investigate the electrochemical performance of the heterostructures. Results revealed that the heterostructures greatly enhanced material stability and promoted ion and electron transport. Consequently, the Sb 2 S 3 /SnS 2 /C composites displayed a high reversible capacity of 642 mA h g −1 at a current density of 1 A g −1 after 600 cycles and a good rate performance of 367.3 mA h g −1 at 4 A g −1 in a NaPF 6 -diglyme electrolyte. Therefore, Sb 2 S 3 /SnS 2 /C heterostructures are promising anode materials for SIBs.

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Section: Resultsmentioning

confidence: 99%

Hierarchical Sb2S3/SnS2/C heterostructure with improved performance for sodium-ion batteries

Jia

Shen

et al. 2022

Sci. China Mater.

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“…Despite the increased viscosity of the HPC-DND 1 sample would foresee a decreased ionic mobility, the conductivity measurements of the HPC-DND 1 provide a value of 86 ± 4 µS cm − 1 . This effect can be rationalized if we suppose a polymeric chains’ arrangement, induced by DND-polymer interaction, that facilitates the ions hopping from different groups along the chains, despite the increased viscosity of the medium [ 73 , 74 ]. This interesting preliminary result was further investigated by more detailed electrochemical studies.…”

Section: Resultsmentioning

confidence: 99%

A Sustainable Hydroxypropyl Cellulose-Nanodiamond Composite for Flexible Electronic Applications

Palmieri

Pescosolido

Montaina

et al. 2022

Gels

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Designing fully green materials for flexible electronics is an urgent need due to the growing awareness of an environmental crisis. With the aim of developing a sustainable, printable, and biocompatible material to be exploited in flexible electronics, the rheological, structural and charge transport properties of water-based hydroxypropyl cellulose (HPC)-detonation nanodiamond (DND) viscous dispersions are investigated. A rheological investigation disclosed that the presence of the DND affects the orientation and entanglement of cellulose chains in the aqueous medium. In line with rheological analyses, the NMR diffusion experiments pointed out that the presence of DND modifies the hydrodynamic behavior of the cellulose molecules. Despite the increased rigidity of the system, the presence of DND slightly enhances the ionic conductivity of the dispersion, suggesting a modification in the charge transport properties of the material. The electrochemical analyses, performed through Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS), revealed that the HPC-DND system is remarkably stable in the explored voltage range (−0.1 to +0.4 V) and characterized by a lowered bulk resistance with respect to HPC. Such features, coupled with the printability and filmability of the material, represent good requirements for the exploitation of such systems in flexible electronic applications.

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“…Acids with a fluorine-containing substituent are close to strong inorganic acids (pK = 0.6) [31], which is the case of the sulfonic acid matrix copolymer, whereas hydrocarbon-containing acids in DNDs are classified as weak acids (pK = 4.8); this factor weakens the proton conductivity of the composites with the addition of DNDs. However, for these composites based on perfluorinated sulfonic acid copolymers (Nafion, Aquivion) and NDs, a significant increase in proton conductivity was observed at a low humidity [32]. To interpret the effect, the authors of [32] used the hypothesis of limited elasticity of water-conducting pores of membranes, which was first proposed in [33]; the effect of diamond additives on conductivity was attributed to a change in the size of the pores and channels of the membrane material.…”

Section: Proton Conductivitymentioning

confidence: 99%

“…However, for these composites based on perfluorinated sulfonic acid copolymers (Nafion, Aquivion) and NDs, a significant increase in proton conductivity was observed at a low humidity [32]. To interpret the effect, the authors of [32] used the hypothesis of limited elasticity of water-conducting pores of membranes, which was first proposed in [33]; the effect of diamond additives on conductivity was attributed to a change in the size of the pores and channels of the membrane material.…”

Section: Proton Conductivitymentioning

confidence: 99%

Perfluorinated Proton-Conducting Membrane Composites with Functionalized Nanodiamonds

Primachenko

Kulvelis

Лебедев

et al. 2020

Membr. Membr. Technol.

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Composite proton-conducting membranes based on perfluorinated short side chain polymers modified with nanodiamonds having a hydrophilic surface owing to grafted carboxyl groups have been produced. Membrane films are prepared by precipitating the polymer from a dimethylformamide solution with introduced nanodiamonds. The proposed method for synthesizing the composites provides a high mechanical strength and an increase in the proton conductivity of the material with an increase in temperature in a 20-50°С range at rather low diamond concentrations (0.25-1 wt %). These features are important for using the composites in fuel cells at high temperatures.

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Nafion- and aquivion-based nanocomposites containing detonation nanodiamonds

Cited by 16 publications

References 9 publications

Hierarchical Sb2S3/SnS2/C heterostructure with improved performance for sodium-ion batteries

Hierarchical Sb2S3/SnS2/C heterostructure with improved performance for sodium-ion batteries

A Sustainable Hydroxypropyl Cellulose-Nanodiamond Composite for Flexible Electronic Applications

Perfluorinated Proton-Conducting Membrane Composites with Functionalized Nanodiamonds

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