NiCoP Nanoarray: A Superior Pseudocapacitor Electrode with High Areal Capacitance

Kong, Menglai; Wang, Zao; Wang, Weiyi; Ma, Min; Liu, Danni; Hao, Shuai; Kong, Rongmei; Du, Guoping; Asiri, Abdullah M.; Yao, Yadong; Sun, Xuping

doi:10.1002/chem.201700017

Cited by 139 publications

(59 citation statements)

References 72 publications

(114 reference statements)

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“…After NaAc-assisted hydrothermal reaction, the diffraction peaks of precursors located at 33.7°, 35.2°and 59.6°are assigned to (110), (111), (300) plane of hydroxide precursor (JCPDS No. 22-0444), respectively, besides the strong diffraction peaks of Ni foam substrate (~44.6°and 52.5°) [29]. The SEM images of NiCoOH/NF (Fig.…”

Section: Resultsmentioning

confidence: 89%

“…Especially, the TMPs have better electrical conductivity [23] compared with corresponding oxides, which makes it a new growth point in the energy-storage field [24,25]. Researchers pay much attention to the synthesis of phosphide [26][27][28][29][30][31][32][33][34]. The phosphide nanowires [26], nanoparticles [27,28] and nanosheets [29,30] are suitable for supercapacitor.…”

Section: Introductionmentioning

confidence: 99%

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Porous NiCoP nanowalls as promising electrode with high-area and mass capacitance for supercapacitors

Zhang

et al. 2019

Sci. China Mater.

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The design of the electrode with high-area and mass capacitance is important for the practical application of supercapacitors. Here, we fabricated the porous NiCoP nanowalls supported by Ni foam (NiCo-P/NF) for supercapacitors with win-win high-area and mass capacitance. The NiCoOH nanowall precursor was prepared by controlling the deposition rate of Ni 2+ and Co 2+ on NF through a sodium acetate-assisted (floride-free) process. After the phosphorization, the NiCo-P nanowalls formed with high loading about 8.6 mg cm −2 on NF. The electrode combined several advantages favorable for energy storage: the plentiful pores beneficial for ion transport, the nanowalls for easy accommodation of electrolyte, good conductivity of NiCo-P for easy transport of electrons. As expected, the NiCo-P/NF exhibited a high specific mass capacitance (1,861 F g −1 at 1 A g −1 , 1,070 F g −1 at 10 A g −1 ), and high area capacitance (17.31 F cm −2 at 5 mA cm −2 and 10 F cm −2 at 100 mA cm −2 ). The asymmetric supercapacitor (ASC) composed of NiCo-P/ NF positive electrode coupled with commercial active carbon negative electrode exhibited a high energy density of 44.9 W h kg −1 at a power density of 750 W kg −1 . The ASC can easily drive fans, electronic watch and LED lamps, implying their potential for the practical application.

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Section: Resultsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Porous NiCoP nanowalls as promising electrode with high-area and mass capacitance for supercapacitors

Zhang

et al. 2019

Sci. China Mater.

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“…Regrettably, the acquainted sluggish kinetic rate of oxides weakens the fast electron transfer mechanism creating a hindrance to accomplish a high power density and improved catalytic activity. [7] Owing to the properties mentioned above, the NiCoP finds diverse applications such as electromagnetic wave absorption and soft magnets in data storage media. Therefore, bimetallic phosphides composed of nickel and cobalt metals have been reported as an extremely resilient material in strong aqueous electrolytes.…”

Section: Introductionmentioning

confidence: 99%

Electrospun Carbon Nanofibers Encapsulated with NiCoP: A Multifunctional Electrode for Supercapattery and Oxygen Reduction, Oxygen Evolution, and Hydrogen Evolution Reactions

Surendran

Shanmugapriya

Sivanantham

et al. 2018

Advanced Energy Materials

283

148

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Functionalizing nanostructured carbon nanofibers (CNFs) with bimetallic phosphides enables the material to become an active electrode for multifunctional applications. A facile electrospinning technique is utilized for the first time to develop NiCoP nanoparticles encapsulated CNFs that are used as an energy storage system of supercapattery, and as an electrocatalyst for oxygen reduction, oxygen evolution, and hydrogen evolution reaction in KOH electrolyte. Evolving from the inclusion of bimetallic phosphide nanoparticles, the NiCoP/CNF electrode unveils superior‐specific capacitance (333 Fg−1 at 2 Ag−1) and rate capability (87%). The fabricated supercapattery device offers a voltage of 1.6 V that supplies a remarkable energy density (36 Wh kg−1) along with an improved power density (4000 W kg−1) and unwavering cyclic stability (25 000 cycles). Meanwhile, the NiCoP/CNF electrode has simultaneously performed well as a multifunctional electrocatalyst for oxygen reduction reaction at a half‐wave potential of 0.82 V versus reversible hydrogen electrode and can attain a current density of 10 mA cm−2 at a very low overpotential of 268 and 130 mV for the oxygen evolution reaction and hydrogen evolution reaction, respectively. Thus, the NiCoP/CNF with all its inimitable electrode properties has profoundly proved its proficiency at handling multifunctional challenges in terms of both storage and conversion.

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“…Also, the richness in valences of transition‐metals and elemental P facilitates charge storage through reversible faradaic redox reactions. So far, little work has focused on Ni x Co 3 −x P y as SC electrode materials . In addition, a combination of various materials can obtain more oxidation states to further improve electrochemical performance, nevertheless, research on phosphides' composites such as M x− 1 Co 3 −x P y− 1 ‐MP with a tunable molar ratio has not been reported yet.…”

Section: Introductionmentioning

confidence: 99%

Rich‐Mixed‐Valence Ni_xCo_3−xP_y Porous Nanowires Interwelded Junction‐Free 3D Network Architectures for Ultrahigh Areal Energy Density Supercapacitors

Song

Wang

et al. 2018

Adv Funct Materials

132

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Herein, novel phosphide composites (Ni x Co 3−x P y ) are reported with welldefined hexagonal thin-plate morphology and a hieratically porous but robust junction-free 3D network constructed by interwelding porous NWs, which are achieved by first synthesizing 2D Ni-Co precursors with tunable Ni/ Co molar ratios and top-down etching, followed by phosphorization. Owing to enhanced electron/ion transfer, increased availability of active sites/ interfaces, rich mixed valences of bimetals and P, and strong intercomponent synergy, the optimized NiCoP-CoP shows a specific capacitance reaching 1969 F g −1 , much larger than those of Ni-Co sulfides and other similar phosphides. An asymmetric supercapacitor employing the advanced NiCoP-CoP as positive electrode exhibits a remarkable cycling stability with 93% retention after 5000 cycles at 8 A g −1 , which is mainly attributed to such architecture allowing strong mechanical stability and to effectively buffer the strain/volume expansion during fast Faradaic reactions. A single device having both an output voltage as high as 7.2 V and an ultrahigh areal energy density of 639 mWh cm −2 at 48 W cm −2 is realized by a designed configuration in which four capacitors in series connection are stacked with solid-state electrolyte. An almost linear increase in output voltage with the layer number indicates possibility to meet various output requirements for miniaturized electronics.

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NiCoP Nanoarray: A Superior Pseudocapacitor Electrode with High Areal Capacitance

Cited by 139 publications

References 72 publications

Porous NiCoP nanowalls as promising electrode with high-area and mass capacitance for supercapacitors

Porous NiCoP nanowalls as promising electrode with high-area and mass capacitance for supercapacitors

Electrospun Carbon Nanofibers Encapsulated with NiCoP: A Multifunctional Electrode for Supercapattery and Oxygen Reduction, Oxygen Evolution, and Hydrogen Evolution Reactions

Rich‐Mixed‐Valence Ni_xCo_3−xP_y Porous Nanowires Interwelded Junction‐Free 3D Network Architectures for Ultrahigh Areal Energy Density Supercapacitors

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NiCoP Nanoarray: A Superior Pseudocapacitor Electrode with High Areal Capacitance

Cited by 139 publications

References 72 publications

Porous NiCoP nanowalls as promising electrode with high-area and mass capacitance for supercapacitors

Porous NiCoP nanowalls as promising electrode with high-area and mass capacitance for supercapacitors

Electrospun Carbon Nanofibers Encapsulated with NiCoP: A Multifunctional Electrode for Supercapattery and Oxygen Reduction, Oxygen Evolution, and Hydrogen Evolution Reactions

Rich‐Mixed‐Valence NixCo3−xPy Porous Nanowires Interwelded Junction‐Free 3D Network Architectures for Ultrahigh Areal Energy Density Supercapacitors

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Rich‐Mixed‐Valence Ni_xCo_3−xP_y Porous Nanowires Interwelded Junction‐Free 3D Network Architectures for Ultrahigh Areal Energy Density Supercapacitors