Bilayered NiZn(CO3)(OH)2–Ni2(CO3)(OH)2 nanocomposites as positive electrode for supercapacitors

Lee, Damin; Mathur, Sanjay; Kim, Kwang Ho

doi:10.1016/j.nanoen.2021.106076

Cited by 44 publications

(23 citation statements)

References 66 publications

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“…The electrochemical performance of Co‐CH@Ni‐MOFs is comparable to the previously reported MOF and metal hydroxide‐based electrodes (Table S1, Supporting Information). [ 39,41,51–57 ] The storage mechanism of Co‐CH@Ni‐MOFs may be represented by the following equations: [ 51,58,59 ]

\begin{matrix} \begin{matrix} left \\ {Ni}_{3} {(OH)}_{2} {(C_{8} H_{4} O_{4})}_{2} {(H_{2} normalO)}_{4} + {OH}^{-} \\ \leftrightarrow {Ni}_{3} O (OH) {(C_{8} H_{4} O_{4})}_{2} {(H_{2} normalO)}_{4} + {normalH}_{2} O + {normale}^{-} \end{matrix} \end{matrix}

\begin{matrix} Co {({CO}_{3})}_{0.5} (OH) + 2 {OH}^{-} \leftrightarrow CoOOH + 0.5 {CO}_{3}^{2 -} + {normalH}_{2} O + {normale}^{-} \end{matrix}

\begin{matrix} CoOOH + {OH}^{-} \leftrightarrow {CoO}_{2} + {normalH}_{2} O + {normale}^{-} \end{matrix}

…”

Section: Resultsmentioning

confidence: 99%

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One‐Dimensional Co‐Carbonate Hydroxide@Ni‐MOFs Composite with Super Uniform Core–Shell Heterostructure for Ultrahigh Rate Performance Supercapacitor Electrode

Zhang

Yang

Wang

et al. 2022

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The insufficient contact between two phases in the heterostructure weakens the coupling interaction effect, which makes it difficult to effectively improve the electrochemical performance. Herein, a Co‐carbonate hydroxide@ Ni‐metal organic frameworks (Co‐CH@Ni‐MOFs) composite with super uniform core‐shell heterostructure is fabricated by adopting 1D Co‐CH nanowires as structuredirecting agents to induce the coating of Ni‐MOFs. Both experimental and theoretical calculation results demonstrate that the heterostructure plays a vital role in the high performance of the as‐prepared materials. On the one hand, the construction of super uniform core‐shell heterostructure can create a large number of interfacial active sites and take advantages of the electrochemical characteristics of each component. On the other hand, the heterostructure can increase the adsorption energy of OH– ions and promote the electrochemical activity for improving the reversible redox reaction kinetics. Based on the aforementioned advantages, the as‐fabricated Co‐CH@Ni‐MOFs electrode exhibits a high specific capacity of 173.1 mAh g−1 (1246 F g−1) at 1 A g−1, an ultrahigh rate capability of 70.3% at 150 A g−1 and excellent cycling stability with 90.1% capacity retention after 10 000 cycles at 10 A g−1. This study may offer a versatile design for fabricating a MOFs‐based heterostructure as energy storage electrodes.

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\begin{matrix} \begin{matrix} left \\ {Ni}_{3} {(OH)}_{2} {(C_{8} H_{4} O_{4})}_{2} {(H_{2} normalO)}_{4} + {OH}^{-} \\ \leftrightarrow {Ni}_{3} O (OH) {(C_{8} H_{4} O_{4})}_{2} {(H_{2} normalO)}_{4} + {normalH}_{2} O + {normale}^{-} \end{matrix} \end{matrix}

\begin{matrix} Co {({CO}_{3})}_{0.5} (OH) + 2 {OH}^{-} \leftrightarrow CoOOH + 0.5 {CO}_{3}^{2 -} + {normalH}_{2} O + {normale}^{-} \end{matrix}

\begin{matrix} CoOOH + {OH}^{-} \leftrightarrow {CoO}_{2} + {normalH}_{2} O + {normale}^{-} \end{matrix}

…”

Section: Resultsmentioning

confidence: 99%

“…The electrochemical performance of Co-CH@Ni-MOFs is comparable to the previously reported MOF and metal hydroxide-based electrodes (Table S1, Supporting Information). [39,41,[51][52][53][54][55][56][57] The storage mechanism of Co-CH@Ni-MOFs may be represented by the following equations: [51,58,…”

Section: Electrochemical Propertiesmentioning

confidence: 99%

One‐Dimensional Co‐Carbonate Hydroxide@Ni‐MOFs Composite with Super Uniform Core–Shell Heterostructure for Ultrahigh Rate Performance Supercapacitor Electrode

Zhang

Yang

Wang

et al. 2022

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“…[ 1,2 ] As one kind of supercapacitors, pseudocapacitors (PCs), featuring high energy density and specific capacitance due to fast and reversible redox reactions, have been applied in many fields. [ 3–5 ] Recently, earth‐abundant transition‐metal‐based materials, such as transitional metal chalcogenides and transition‐metal oxyhydroxides, have been considered the most potential materials for PCs due to their low cost and high activity. However, the poor conductivity still limits their practical application.…”

Section: Introductionmentioning

confidence: 99%

Nonmetal (S or Se)‐Bridged Core Shell Electrodes for Promoting Electrochemical Performance

Wang

Sun

Zhang

et al. 2022

Advanced Energy Materials

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To meet strategic applications, rational design of advanced electrochemical materials would solve the poor electrochemical performance of core‐shell electrodes caused by the weak interfacial interaction between core and shell. Herein, two novel core‐shell electrodes LCCH‐S@PBAs and LCCH‐Se@PBAs are fabricated with a nonmetal (S or Se) bridging the core and shell. Electrochemical tests show that the as‐synthesized electrodes, especially LCCH‐S@PBAs, present higher mass‐specific capacitance with 10.1 C cm−2 at 1 mA cm−2, which is much better than that of PBA‐based homologs. Experimental results and theoretical calculations show that the bridging S or Se in the interface, not only tune electronic nature of the d‐states of metal ions in core and shell, but also form ionic bonds (M1(LCCH)‐S‐M2(PBAs) and M1(LCCH)‐Se‐M2(PBAs)) which facilitates the transmission of electrons, thus making a substantial enhancement of electrochemical performance via a dynamically more favorable pathway. The comparison with LCCH‐C@PBAs, in which the rGO is connected with core and shell by Van der Waals’ forces, also suggests the outstanding role of ionic bonds for electrochemical performance. This work proves that nonmetal bridging structures make a great contribution for enhanced electrochemical performance and demonstrates the large space to modulate the nonmetal bridging status for core‐shell structures in electrochemical materials.

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“…7 Lee et al reported synthesis of porous NiZn(CO 3 )(OH) 2 -Ni 2 (CO 3 )(OH) 2 bilayers deposited on a Ni foam through a two-step processing. 8 Koyyada et al reported synthesis of ZnCo 2 O 4 grown on Ni foam by the microwave-assisted solvothermal method. 9 These active materials can directly contact with electrolyte, enhancing electrochemical active sites and reducing the diffusion resistance of ion, leading to excellent electrochemical performance.…”

Section: Introductionmentioning

confidence: 99%

“…Sun et al reported the synthesis of graphene and MnO 2 grown directly on Ni foam by a two‐step processing 7 . Lee et al reported synthesis of porous NiZn(CO 3 )(OH) 2 ‐Ni 2 (CO 3 )(OH) 2 bilayers deposited on a Ni foam through a two‐step processing 8 . Koyyada et al reported synthesis of ZnCo 2 O 4 grown on Ni foam by the microwave‐assisted solvothermal method 9 .…”

Section: Introductionmentioning

confidence: 99%

Electrostatic flocking MnO ₂ nanofiber electrode for long cycling stability supercapacitors

Qin

et al. 2022

Intl J of Energy Research

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Summary A new double‐layer hybrid electrode based on MnO2 nanofibers was prepared by the electrostatic flocking method. Compared with the traditional dopping method, the MnO2 nanofibers can be embedded on surface of graphene/polyvinylidene fluoride (PVDF) composite coating. The symmetrical supercapacitor based on electrostatic flocking electrode was further assembled, which showed a high energy density of 12.1 Wh kg−1 and ultra‐long cyclic life of 109.4% after 10 000 cycles. The result was attributed to that electrostatic flocking MnO2 nanofibers were directly exposed to electrolyte, reducing interfacial resistance. The work provides a new way to prepare high‐performance electrode for various applications.

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Bilayered NiZn(CO3)(OH)2–Ni2(CO3)(OH)2 nanocomposites as positive electrode for supercapacitors

Cited by 44 publications

References 66 publications

One‐Dimensional Co‐Carbonate Hydroxide@Ni‐MOFs Composite with Super Uniform Core–Shell Heterostructure for Ultrahigh Rate Performance Supercapacitor Electrode

One‐Dimensional Co‐Carbonate Hydroxide@Ni‐MOFs Composite with Super Uniform Core–Shell Heterostructure for Ultrahigh Rate Performance Supercapacitor Electrode

Nonmetal (S or Se)‐Bridged Core Shell Electrodes for Promoting Electrochemical Performance

Electrostatic flocking MnO ₂ nanofiber electrode for long cycling stability supercapacitors

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Bilayered NiZn(CO3)(OH)2–Ni2(CO3)(OH)2 nanocomposites as positive electrode for supercapacitors

Cited by 44 publications

References 66 publications

One‐Dimensional Co‐Carbonate Hydroxide@Ni‐MOFs Composite with Super Uniform Core–Shell Heterostructure for Ultrahigh Rate Performance Supercapacitor Electrode

One‐Dimensional Co‐Carbonate Hydroxide@Ni‐MOFs Composite with Super Uniform Core–Shell Heterostructure for Ultrahigh Rate Performance Supercapacitor Electrode

Nonmetal (S or Se)‐Bridged Core Shell Electrodes for Promoting Electrochemical Performance

Electrostatic flocking MnO 2 nanofiber electrode for long cycling stability supercapacitors

Contact Info

Product

Resources

About

Electrostatic flocking MnO ₂ nanofiber electrode for long cycling stability supercapacitors