Battery-like MnCo2O4 electrode materials combined with active carbon for hybrid supercapacitors

Hu, Xiaoying; Nan, Haoshan; Liu, Miao; Liu, Shujie; An, Tao; Tian, Hongwei

doi:10.1016/j.electacta.2019.03.166

Cited by 87 publications

(27 citation statements)

References 73 publications

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“…According to the above‐mentioned results and related reports, the possible mechanism for Co 2 (OH) 3 Cl@FeCo 2 O 4 composite synthesis by this one ‐step hydrothermal route may be summarized as following Equations:

{Co}^{2 +} + H_{2} O \to {[Co {((), H_{2} O)}_{6}]}^{2 +}

{[Co {((), H_{2} O)}_{6}]}^{2 +} + n {Cl}^{-} \to {[Co {italicCl}_{n} {((), H_{2} O)}_{6 - n}]}^{2 - n} + n H_{2} O

{NH}_{3} ∙ H_{2} O \to {NH}_{4}^{+} + {OH}^{-}

{NH}_{3} + H_{2} O \to {NH}_{4}^{+} + {OH}^{-}

{Fe}^{2 +} + 2 {Co}^{2 +} + 6 {OH}^{-} \to italicFe {Co}_{2} {(italicOH)}_{6} \to italicFe {Co}_{2} O_{4}

2 {[Co {italicCl}_{n} {((), H_{2} O)}_{6 - n}]}^{2 - n} \to {Co}_{2} {(italicOH)}_{3}

…”

Section: Resultsmentioning

confidence: 90%

Hierarchitecture Co ₂ (OH) ₃ Cl@FeCo ₂ O ₄ composite as a novel and high‐performance electrode material applied in supercapacitor

Wang

Peng

et al. 2020

Int J Energy Res

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Summary One‐step hydrothermal reaction has successfully been used to prepared three‐dimensional hierarchitecture Co2(OH)3Cl@FeCo2O4 composite without any annealing treatment. The samples are investigated to confirm the crystal structure, elemental composition, morphology structure and electrochemical performance. The results show the sample has a three‐dimensional hierarchitecture that nanoblocks are assembled with nanoparticles. And the specific surface area is 87.5 m2 g−1 and the total pore volume is 0.17 cm3 g−1. Meanwhile, the composite shows a high specific capacitance of 1110.0 F·g−1 at 1 A·g−1 and great cycling stability with 98.8% capacitance retention after 3000 cycles. To evaluate the electrochemical performances, the results are used to compare with the Co2(OH)3Cl and FeCo2O4 nanomaterials, indicating a higher capacitance and longer cycle stability shown by the as‐synthesized sample. The as‐synthesized Co2(OH)3Cl@FeCo2O4 composite has an outstanding electrochemical performance, predicting an enormous potential and promising future as a novel electrode material applied in supercapacitor.

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{Co}^{2 +} + H_{2} O \to {[Co {((), H_{2} O)}_{6}]}^{2 +}

{[Co {((), H_{2} O)}_{6}]}^{2 +} + n {Cl}^{-} \to {[Co {italicCl}_{n} {((), H_{2} O)}_{6 - n}]}^{2 - n} + n H_{2} O

{NH}_{3} ∙ H_{2} O \to {NH}_{4}^{+} + {OH}^{-}

{NH}_{3} + H_{2} O \to {NH}_{4}^{+} + {OH}^{-}

{Fe}^{2 +} + 2 {Co}^{2 +} + 6 {OH}^{-} \to italicFe {Co}_{2} {(italicOH)}_{6} \to italicFe {Co}_{2} O_{4}

2 {[Co {italicCl}_{n} {((), H_{2} O)}_{6 - n}]}^{2 - n} \to {Co}_{2} {(italicOH)}_{3}

…”

Section: Resultsmentioning

confidence: 90%

Hierarchitecture Co ₂ (OH) ₃ Cl@FeCo ₂ O ₄ composite as a novel and high‐performance electrode material applied in supercapacitor

Wang

Peng

et al. 2020

Int J Energy Res

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“…[67] Hu et al And it retained only 36.85 % of its initial capacitance at a scan rate of 100 mV s À 1 when the mass loading of activated carbon is 400 mg the retention rate decreased gradually with the decrease in the active loading of the activated carbon. [68] Yuan et al, investigated the electrochemical behavior of MnCo 2 O 4 @Reduced Graphene Oxide this electrode material was synthesized by hydrothermal process. The morphology of the MnCo 2 O 4 @rGO was analyzed using TEM MnCo 2 O 4 nanoparticles with small diameters of around 10 nm are uniformly formed and densely dispersed on the graphene sheets.…”

Section: Co-based Bimetallic Oxides With Carbon Compositesmentioning

confidence: 99%

“…The electrochemical investigations were made by using 1 M KOH as an electrolyte the electrode material attained the highest specific capacity of 443.5 C g −1 at a current density of 0.5 A g −1 . And it retained only 36.85 % of its initial capacitance at a scan rate of 100 mV s −1 when the mass loading of activated carbon is 400 mg the retention rate decreased gradually with the decrease in the active loading of the activated carbon [68] . Yuan et al ., investigated the electrochemical behavior of MnCo 2 O 4 @Reduced Graphene Oxide this electrode material was synthesized by hydrothermal process.…”

Section: Bimetallic Oxidesmentioning

confidence: 99%

Recent Trends in Bimetallic Oxides and Their Composites as Electrode Materials for Supercapacitor Applications

2021

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There is a growing interest in supercapacitors as energy storage systems due to their high specific power, fast charge/discharge rates, and long cycling stability. Researchers have focused recently on developing nanomaterials to enhance the capacitive performance of supercapacitors. The inclusion of electroactive components, such as transition metal oxides (TMOs), carbonbased materials, and conducting polymers (CPs), is believed to play an important role in improving the electrochemical behavior of the electrode materials. Nevertheless, supercapacitors containing TMOs, carbon-based materials, and CPs commonly suffer from inferior ion-transport kinetics and poor electronic conductivity, which can affect the rate capability and cycling stability of the electrodes. Therefore, the development of TMO/CP and TMO/carbon-based electrode materials has gained widespread attention because they synergistically combine the advantages of both materials, enabling revolutionary applications in the electrochemical field. In general, TMOs have given good performance as electrodes for supercapacitors by further increasing the performance of the electrode when two metal cations are introduced into a single crystal structure. This Review describes and highlights recent progress in the development of bimetallic oxides regarding their design approach, configurations, and electrochemical properties for supercapacitor applications, at the same time providing new opportunities for future energy storage technologies.

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“…On the other hand, one way to address the challenge of high energy density is developing HSCs with a much higher voltage window. [16][17][18] The HSCs based on the Ti 3 C 2 T x @CNT electrode delivered an energy density of 62 W h kg À1 with a voltage window of 1.6 V. 9 Li et al synthesized an N-doped activated carbon electrode for HSC, which showed great energy density and a good cycling stability. 19 Here, we successfully fabricated NiS nanosheets by a hydrothermal method and investigated its electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

Ultra-thin NiS nanosheets as advanced electrode for high energy density supercapacitors

et al. 2020

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Battery-like MnCo2O4 electrode materials combined with active carbon for hybrid supercapacitors

Cited by 87 publications

References 73 publications

Hierarchitecture Co ₂ (OH) ₃ Cl@FeCo ₂ O ₄ composite as a novel and high‐performance electrode material applied in supercapacitor

Hierarchitecture Co ₂ (OH) ₃ Cl@FeCo ₂ O ₄ composite as a novel and high‐performance electrode material applied in supercapacitor

Recent Trends in Bimetallic Oxides and Their Composites as Electrode Materials for Supercapacitor Applications

Ultra-thin NiS nanosheets as advanced electrode for high energy density supercapacitors

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Battery-like MnCo2O4 electrode materials combined with active carbon for hybrid supercapacitors

Cited by 87 publications

References 73 publications

Hierarchitecture Co 2 (OH) 3 Cl@FeCo 2 O 4 composite as a novel and high‐performance electrode material applied in supercapacitor

Hierarchitecture Co 2 (OH) 3 Cl@FeCo 2 O 4 composite as a novel and high‐performance electrode material applied in supercapacitor

Recent Trends in Bimetallic Oxides and Their Composites as Electrode Materials for Supercapacitor Applications

Ultra-thin NiS nanosheets as advanced electrode for high energy density supercapacitors

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Hierarchitecture Co ₂ (OH) ₃ Cl@FeCo ₂ O ₄ composite as a novel and high‐performance electrode material applied in supercapacitor

Hierarchitecture Co ₂ (OH) ₃ Cl@FeCo ₂ O ₄ composite as a novel and high‐performance electrode material applied in supercapacitor