One-step phosphating synthesis of CoP nanosheet arrays combined with Ni<sub>2</sub>P as a high-performance electrode for supercapacitors

Shu, Tie; Gao, Huizhen; Li, Qian; Wei, Fuxiang; Ren, Yaojian; Sun, Zhi; Qi, Jiqiu; Sui, Yanwei

doi:10.1039/d0nr05406b

Cited by 54 publications

(18 citation statements)

References 63 publications

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“…Fe 3+ and Fe 2+ ions added into GO suspension tend to be attached by these functional groups owing to electrostatic attraction, which might be served as nucleation centers in coprecipitation reactions. The introduction of NH 4+ and PEG-400 makes Fe 3 O 4 nucleus grow selectively and inhibits agglomeration [ 19 , 20 ]. After the reduction from GO to RGO by hydrazine hydrate, Fe 3 O 4 /RGO nanocomposites with unique microstructures could be obtained.…”

Section: Resultsmentioning

confidence: 99%

Magnetite Nanoparticles In-Situ Grown and Clustered on Reduced Graphene Oxide for Supercapacitor Electrodes

et al. 2022

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Fe3O4 nanoparticles with average sizes of 3–8 nm were in-situ grown and self-assembled as homogeneous clusters on reduced graphene oxide (RGO) via coprecipitation with some additives, where RGO sheets were expanded from restacking and an increased surface area was obtained. The crystallization, purity and growth evolution of as-prepared Fe3O4/RGO nanocomposites were examined and discussed. Supercapacitor performance was investigated in a series of electrochemical tests and compared with pure Fe3O4. In 1 M KOH electrolyte, a high specific capacitance of 317.4 F g−1 at current density of 0.5 A g−1 was achieved, with the cycling stability remaining at 86.9% after 5500 cycles. The improved electrochemical properties of Fe3O4/RGO nanocomposites can be attributed to high electron transport, increased interfaces and positive synergistic effects between Fe3O4 and RGO.

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Section: Resultsmentioning

confidence: 99%

Magnetite Nanoparticles In-Situ Grown and Clustered on Reduced Graphene Oxide for Supercapacitor Electrodes

et al. 2022

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“…The C A , P , and E values we obtained are much higher than those of many of the MOF-based SCs reported in the literature, including some using hybrid electrodes (Table S3, Supporting Information). − The cycling performance data of the SASC (Figure b) indicate a capacitance retention of 78.4% after 1000 consecutive GCD cycles at 1 mA·cm –2 . It is likely that the slight structural change of PANI at the early charge/discharge process, swelling, and shrinking of the molecular chains of PANI by the electrolyte or polymer degradation might have occurred, which lowers C A after 1000 GCD cycles. , To investigate the mechanical stability of the flexible SC, a bending test was carried out (Figure c).…”

Section: Results and Discussionmentioning

confidence: 99%

Metal–Organic Framework/Polyaniline Nanocomposites for Lightweight Energy Storage

Udayan

Sadak

Gunasekaran

2020

ACS Appl. Energy Mater.

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We describe a simple strategy to modify zeolitic imidazolate framework-8 (ZIF-8) using polyaniline (PANI) via a controlled interfacial polymerization method, without using a template, to synthesize ZIF-8/PANI nanocomposites. Our method avoids the agglomeration of ZIF-8/PANI, boosts the utilization of active materials, and exposes more active sites, and hence, it is advantageous to facile electron transfer. Because of its unique hierarchical structure, ZIF-8/PANI has a high surface area (610.8 m2·g–1) and the ZIF-8/PANI electrode exhibited a capacitance value of 395.4 F·g–1 at 0.2 A·g–1, which is the highest among the metal–organic framework (MOF)-based composites reported to date. A solid-state asymmetric supercapacitor (SASC) fabricated with ZIF-8/PANI as the electrode showed good capacitive behavior over a wide potential window from 0 to 2.5 V without nonaqueous electrolytes. It exhibited a specific areal capacitance of 28.1 mF·cm–2 at 0.1 mA·cm–2, which is much higher than the values reported for other MOF-based supercapacitors. The SASC also possessed a high energy density (3.2 μW h·cm–2) and power density (1.1 mW·cm–2), good cycling stability, and flexibility. These characteristics make our ZIF-8/PANI nanocomposite an excellent MOF-based electrode for highly flexible and lightweight energy storage applications.

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“…prepared the composite phosphide of CoP and Ni 2 P (NPC/NF) through phosphorization of ZIF‐67 nanosheets on nickel foam. [ 131 ] The CoP could inherit the microstructure of ZIF‐67 and exhibited ideal electrochemical properties. An ASC was fabricated with NPC/NF as cathode and RGO as anode, which delivered E d of 26.9 μWh cm −2 and 93.75% capacitance retention after 5000 cycles.…”

Section: Classifications Of Ascs With Carbon Materials As Electrodementioning

confidence: 99%

Recent Advances of Asymmetric Supercapacitors

Bai

Pan

et al. 2020

Adv Materials Inter

195

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Asymmetric supercapacitors (ASCs) have attracted significant attentions worldwide owing to their wider voltage window compared with symmetric supercapacitors (SCs). Through combinations of two electrodes with different charge storage mechanisms or different redox reactions, extended operating voltage window can be realized for ASCs. In this article, first the ASCs are classified into two types based on different charge storage mechanisms: electric double‐layer capacitive (EDLC)//pseudocapacitive‐type ASCs and EDLC//battery‐type hybrid SCs. For the EDLC/pseudocapacitive‐type ASC, carbon materials are adopted as anode and transition metal oxides including MnO2, RuO2, etc., are utilized as cathodes. For EDLC//battery‐type hybrid SCs, carbon materials as anode are combined with metal oxide/hydroxide such as NiO, and Ni(OH)2, etc., as cathode. Recently, Li‐ion‐based ASCs composed of carbon materials and Li‐ion battery‐type electrode materials with a Li‐containing organic electrolyte show great potentials to be promising alternatives. Some metal oxides/nitrides including InO2, Bi2O3, Fe3O4, Fe2O3, and VN can work in a negative potential range. By coupling another battery/pseudocapacitive electrode, all redox‐type ASCs are assembled and their electrochemical performances are widely studied. Then, based on the above categories recent advances of ASCs are summarized. Finally, the challenges and prospects for the development of ASCs are pointed out from perspectives of this study.

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One-step phosphating synthesis of CoP nanosheet arrays combined with Ni₂P as a high-performance electrode for supercapacitors

Abstract: The transition metal phosphide is an excellent candidate for supercapacitor due to its superior electrical conductivity and high theoretical capacity. In addition, compared with traditional 3D nano-materials, 2D nanosheets possess...

Cited by 54 publications

References 63 publications

Magnetite Nanoparticles In-Situ Grown and Clustered on Reduced Graphene Oxide for Supercapacitor Electrodes

Magnetite Nanoparticles In-Situ Grown and Clustered on Reduced Graphene Oxide for Supercapacitor Electrodes

Metal–Organic Framework/Polyaniline Nanocomposites for Lightweight Energy Storage

Recent Advances of Asymmetric Supercapacitors

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One-step phosphating synthesis of CoP nanosheet arrays combined with Ni2P as a high-performance electrode for supercapacitors

Abstract: The transition metal phosphide is an excellent candidate for supercapacitor due to its superior electrical conductivity and high theoretical capacity. In addition, compared with traditional 3D nano-materials, 2D nanosheets possess...

Cited by 54 publications

References 63 publications

Magnetite Nanoparticles In-Situ Grown and Clustered on Reduced Graphene Oxide for Supercapacitor Electrodes

Magnetite Nanoparticles In-Situ Grown and Clustered on Reduced Graphene Oxide for Supercapacitor Electrodes

Metal–Organic Framework/Polyaniline Nanocomposites for Lightweight Energy Storage

Recent Advances of Asymmetric Supercapacitors

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Product

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One-step phosphating synthesis of CoP nanosheet arrays combined with Ni₂P as a high-performance electrode for supercapacitors