The surface capacitance behavior and its contribution to the excellent performance of cobalt ferrite/carbon anode in lithium storage

Li, Yuzhu; Meng, Yanshuang; Xiao, Mingjun; Liu, Xinglian; Zhu, Fuliang; Zhang, Yue

doi:10.1007/s10854-019-01629-x

Cited by 14 publications

(11 citation statements)

References 62 publications

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“…The charge storage mechanism was analyzed using the following equation. 56,57 where the slope of log( i ) vs. log( v ) gives the value of b which signifies the behavior of current; if b = 0.5, the current is under diffusion control and if b = 1, the current is under capacitive control. As observed from Fig.…”

Section: Resultsmentioning

confidence: 99%

A unique 2.1 V “Water in Salt” elemental sulfur based Na-ion hybrid storage capacitor

Kumar

Nagaiah

2022

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 99%

A unique 2.1 V “Water in Salt” elemental sulfur based Na-ion hybrid storage capacitor

Kumar

Nagaiah

2022

J. Mater. Chem. A

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“…Научный интерес к процессам формирования структуры этих материалов обусловлен наличием у них полифункциональных свойств. Шпинели на основе феррита кобальта (II) CoFe2O4 относятся к магнитным материалам [1,2], известно их применение в качестве катализаторов [3][4][5], адсорбентов Al 3+ [6], Zn 2+ [7], электродов литий-ионных источников тока [8,9], топливных элементов [10], в медицинских целях -для адресной доставки лекарств [11]. Процессам водоподготовки с адсорбцией катионов металлов различными сорбентами посвящен ряд работ [6,7,[12][13][14].…”

Section: Introductionunclassified

Synthesis and properties of composite material CoFe2O4/C

Шабельская

Egorova

Chernysheva

et al. 2020

Vestn. Voronež. gos. univ. inž. tehnol.

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Scientific interest in the processes of forming the structure of magnetic spinels and composites based on them is due to the possibility of synthesis of materials with multifunctional properties. The process of formation of cobalt (II) nanocrystalline ferrite and CoFe2O4/C composite material is studied. The mechanism of formation of structure of materials including a stage of formation of hydroxides of transition elements, precursors on the basis of complex connections of cations of iron and cobalt with citric acid and their subsequent destruction at heating is offered. The synthesized materials were characterized by x-ray phase analysis, electron microscopy, low-temperature nitrogen adsorption, Debye-Scherrer methods. It is shown that cobalt (II) ferrite has a developed surface, the value of the surface area according to the BET method is 16 m2/g, the average size of the crystallites determined by the Debye-Scherrer equation is 4.0 nm. Activated carbon with a specific surface area of 685 m2/g was used to prepare the composite material. The resulting composite material has a surface area of 222 m2/g, the average crystallite size of 1.1 nm. Cobalt (II) ferrite, included in the composition of the composite material CoFe2O4/C, has a slightly higher value of the lattice parameter, compared with pure cobalt (II) ferrite, which is associated with a decrease in the degree of spinel inversion. The synthesized composite material was tested in the process of adsorption of copper (II) cations from an aqueous solution. It is shown that CoFe2O4/C exhibits an increased adsorption capacity for copper (II) cations in comparison with pure activated carbon, despite a decrease in the specific surface area. The result is explained by the involvement of cobalt (II) ferrite in the adsorption process. The obtained materials may be of interest as catalysts, adsorbents.

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“…Oxide systems of ferrites of transition elements, possessing spinelstructure with general formula MFe2O4 (М is a bivalent cation) are one example of materials with multifunctional properties. Of particular interest are ferrites-spinels based on cobalt (II) ferrite CoFe2O4, as these are magnetic materials [1][2][3][4][5][6][7], which can be used as electrodes in lithium-ion batteries [8][9][10], selective sensors [11], absorbants of microvawe radiation [12], adsorbents of metal cations and coloring agents [13][14][15][16][17], catalysts [18][19][20][21], for medical purposes in cancer treatment [22]. Despite many years of research of oxide ferrite systems, the interest for such systems is still very strong.…”

Section: Introductionmentioning

confidence: 99%

“…The traditional methods for producing ferrites with spinel structure include ceramic (from oxides of the corresponding metals) [2], decomposition of hydroxides and salts [7]. To obtain fine-crystalline samples, various methods are used, in particular, decomposition of organic component of the reaction mixture, which can be polyvinylpyrrolidone [10,23], citric [20] or other [24] organic acids, etc. The most significant effect in a number of technical processes is achieved when using composite materials containing both organic and inorganic components [10,12,21].…”

Section: Introductionmentioning

confidence: 99%

“…To obtain fine-crystalline samples, various methods are used, in particular, decomposition of organic component of the reaction mixture, which can be polyvinylpyrrolidone [10,23], citric [20] or other [24] organic acids, etc. The most significant effect in a number of technical processes is achieved when using composite materials containing both organic and inorganic components [10,12,21]. The aim of this work was to study the possibility of synthesizing the nanosized composite material CoFe2O4/C and to assess its adsorption activity with respect to copper cations from aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

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Obtaining a composite material based on cobalt (II) ferrite for purification of aqueous solutions

et al. 2019

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In modern society, the detrimental effect of industrial production on the environment is intensifying. Contaminated wastewaters of industrial enterprises deteriorate the environmental situation and violate the ecosystem stability. One of efficient methods of dealing with harmful impurities in wastewater is to remove them using adsorption active materials. Oxide systems of ferrites of transition elements are one example of materials with multifunctional properties. The possibility of synthesizing nanoscale cobalt (II) ferrite and a composite material based on it with the CoFe2O4/C composition was studied. The obtained materials were studied using X-ray phase analysis, electron microscopy (SEM), and the BET method of low-temperature nitrogen adsorption. It was established that cobalt (II) ferrite has a developed surface (the surface area measured by the BET method is 16 m2/g, the average crystallite size obtained by the Debye-Scherrer method is 4.0 nm). The mechanism of CoFe2O4 structure formation is considered. The composite material CoFe2O4/C is characterized by a high surface area (222 m2/g, average crystallite size of 1.1 nm) and exhibits increased adsorption ability with respect to copper (II) cations from aqueous solutions. The obtained results are of interest as materials for purification of aqueous solutions.

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The surface capacitance behavior and its contribution to the excellent performance of cobalt ferrite/carbon anode in lithium storage

Cited by 14 publications

References 62 publications

A unique 2.1 V “Water in Salt” elemental sulfur based Na-ion hybrid storage capacitor

A unique 2.1 V “Water in Salt” elemental sulfur based Na-ion hybrid storage capacitor

Synthesis and properties of composite material CoFe2O4/C

Obtaining a composite material based on cobalt (II) ferrite for purification of aqueous solutions

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