Insight into faradaic mechanism of polyaniline@NiSe2 core-shell nanotubes in high-performance supercapacitors

Hao, Tianzi; Liu, Yangyang; Liu, Guanglei; Peng, Chengxin; Chen, Bingjie; Feng, Yutong; Ru, Jiajia; Yang, Jinhu

doi:10.1016/j.ensm.2019.05.011

Cited by 75 publications

(32 citation statements)

References 49 publications

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“…[37][38][39] Compared with CoO/CoS x ,the Co 2p spectrum of the CoO/Co-Cu-S-2 shifts to ahigher binding energy,implying the electron deficient state. [40] Thecharacteristic peaks at 932.3 eV and 952.2 eV correspond to the Cu 2p 3/2 and Cu 2p 1/2 orbitals of Cu + with the shoulder peaks at 934.3 eV and 954.2 eV confirming the presence of Cu 2+ (Figure 4b). [41][42][43] TheCu2pspectrum shifts to alower binding energy compared with Cu 1.81 S, indicating the electron-rich state.…”

Section: Resultsmentioning

confidence: 95%

Construction of CoO/Co‐Cu‐S Hierarchical Tubular Heterostructures for Hybrid Supercapacitors

et al. 2019

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Hierarchical hollow structures for electrode materials of supercapacitors could enlarge the surface area, accelerate the transport of ions and electrons, and accommodate volume expansion during cycling. Besides, construction of heterostructures would enhance the internal electric fields to regulate the electronic structures. All these features of hierarchical hollow heterostructures are beneficial for promoting the electrochemical properties and stability of electrode materials for high‐performance supercapacitors. Herein, CoO/Co‐Cu‐S hierarchical tubular heterostructures (HTHSs) composed of nanoneedles are prepared by an efficient multi‐step approach. The optimized sample exhibits a high specific capacity of 320 mAh g−1 (2300 F g−1) at 2.0 A g−1 and outstanding cycling stability with 96.5 % of the initial capacity retained after 5000 cycles at 10 A g−1. Moreover, an all‐solid‐state hybrid supercapacitor (HSC) constructed with the CoO/Co‐Cu‐S and actived carbon shows a stable and high energy density of 90.7 Wh kg−1 at a power density of 800 W kg−1.

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Section: Resultsmentioning

confidence: 95%

Construction of CoO/Co‐Cu‐S Hierarchical Tubular Heterostructures for Hybrid Supercapacitors

et al. 2019

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“…Galvanostatic charge–discharge (GCD) was used to estimate the electrochemical behavior of the electrode materials in the potential range from −1.15 to −0.1 V. [ 37 ] The GCD curves of NP3, NP5, and NP7 electrodes at different current densities (3, 5, 8, 10, and 15 A g −1 ) are shown in Figure S14a, Supporting Information, Figure 4c, and Figure S14b, Supporting Information, respectively. The observed discharge curves of the electrodes show excellent capacitance and obvious Faraday capacitance with a discharge platform at around −1.0 V. According to Equation (2), the NP5 electrode exhibits a great specific capacitance of 597.1 F g −1 at the current density of 3 A g −1 (Figure 4d), which is higher than that of other iron‐based electrodes in previous literatures (Table S2, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Hierarchical Fe₃O₄@FeS₂ Nanocomposite as High‐Specific‐Capacitance Electrode Material for Supercapacitors

Liu

Yan

et al. 2020

Energy Tech

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Iron-based materials are ideal faradaic electrodes for supercapacitors. However, boosting the specific capacitance and preparation with the simple method of iron-based materials remains a great challenge. Herein, hierarchical Fe 3 O 4 @FeS 2 nanocomposites are constructed through an annealing strategy with monohydrate ferrous sulfate as the precursor. X-ray diffractometry, high-resolution transition electron, and X-ray photoelectron spectroscopy results reveal that the hierarchical Fe 3 O 4 @FeS 2 nanocomposite is successively fabricated. The asprepared materials exhibit a remarkable specific capacitance of 597.1 F g À1 at a current density of 3 A g À1 as electrode materials of supercapacitors. Inspiringly, specific capacitance is superior to most iron-based electrodes in previous reports. This may be ascribed to the junction at the interface of the different components and the efficient electron transfer of FeS 2. This work is meaningful for the design and preparation of electrode materials with specific capacitance.

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“…The strongly interaction of the two componentsi sn ot only helpful for electron transporting within the electrode, but also favorable for the ion adsorption/desorption on the surface of electrode. [45] As can be seen in the Nyquist plots, both contactr esistance (R s )a nd charget ransferr esistance( R ct )o ft he Co 2 BIM 4 -Co 3 O 4 / NC electrode are the smallest amongt he three kind of materials (Figure 7a), indicating that the electrode haso utstanding conductivity and consistent electrode-electrolyte interface. We use Zview software to fit the data of the impedance spectrum to build an equivalent circuit diagram.…”

mentioning

confidence: 86%

“…Recently, Yang and co‐workers developed a novel electrode with ultrahigh pseudocapacitance based on core–shell PANI@NiSe 2 nanotubes. The strongly interaction of the two components is not only helpful for electron transporting within the electrode, but also favorable for the ion adsorption/desorption on the surface of electrode [45] …”

Section: Figurementioning

confidence: 99%

Synthesis of Co₃O₄/Carbon Heteroaerogels with Ultrahigh Capacitance via Polyethyleneimine Intercalation of Co₂BIM₄ Nanosheets

Liu

Yue

et al. 2021

Chemistry A European J

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The development of metal–organic frameworks (MOFs)‐based supercapacitors have attracted intense concentration in recent years due to their regularly arranged porous and tunable pore sizes. However, the performance of the MOFs‐derived supercapacitors is also low because of their poor electrical conductivity and rarely accessible active sites. In the present work, we developed a Co‐MOF (namely Co2BIM4, BIM=benzimidazole) nanosheets derived Co3O4/nitrogen‐doped carbon (Co2BIM4‐Co3O4/NC) heteroaerogel as a novel supercapacitor electrode. The 3D Co2BIM4‐Co3O4/NC heteroaerogels were obtained by directly intercalating polyethyleneimine (PEI) into the interlayers of Co2BIM4 nanosheets and following by carbonizing the resulting Co2BIM4/PEI composite. The Co2BIM4‐Co3O4/NC electrode possessed 3D conductive framework with an overlapped hetero‐interface and expanded interlayers, leading to fast and stable charge transfer/diffusion and an enhanced pseudocapacitance performance. Therefore, the Co2BIM4‐Co3O4/NC electrode showed ultrahigh capacitance of 2568 F g−1 at 1 A g−1, 1747 F g−1 at 10 A g−1, and excellent long cycling time with a capacitance preservation of 92.7 % following 10000 cycles at 10 A g−1, which is very promising for applications in supercapacitors and other energy storage devices.

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Insight into faradaic mechanism of polyaniline@NiSe2 core-shell nanotubes in high-performance supercapacitors

Cited by 75 publications

References 49 publications

Construction of CoO/Co‐Cu‐S Hierarchical Tubular Heterostructures for Hybrid Supercapacitors

Construction of CoO/Co‐Cu‐S Hierarchical Tubular Heterostructures for Hybrid Supercapacitors

Hierarchical Fe₃O₄@FeS₂ Nanocomposite as High‐Specific‐Capacitance Electrode Material for Supercapacitors

Synthesis of Co₃O₄/Carbon Heteroaerogels with Ultrahigh Capacitance via Polyethyleneimine Intercalation of Co₂BIM₄ Nanosheets

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Insight into faradaic mechanism of polyaniline@NiSe2 core-shell nanotubes in high-performance supercapacitors

Cited by 75 publications

References 49 publications

Construction of CoO/Co‐Cu‐S Hierarchical Tubular Heterostructures for Hybrid Supercapacitors

Construction of CoO/Co‐Cu‐S Hierarchical Tubular Heterostructures for Hybrid Supercapacitors

Hierarchical Fe3O4@FeS2 Nanocomposite as High‐Specific‐Capacitance Electrode Material for Supercapacitors

Synthesis of Co3O4/Carbon Heteroaerogels with Ultrahigh Capacitance via Polyethyleneimine Intercalation of Co2BIM4 Nanosheets

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Hierarchical Fe₃O₄@FeS₂ Nanocomposite as High‐Specific‐Capacitance Electrode Material for Supercapacitors

Synthesis of Co₃O₄/Carbon Heteroaerogels with Ultrahigh Capacitance via Polyethyleneimine Intercalation of Co₂BIM₄ Nanosheets