Facile synthesis of high electrical conductive CoP via solid-state synthetic routes for supercapacitors

Hu, Yumei; Liu, Mao‐Cheng; Yang, Qingqing; Kong, Ling‐Bin; Kang, Long

doi:10.1016/j.jechem.2016.10.001

Cited by 97 publications

(37 citation statements)

References 42 publications

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“…Fig. 6d shows a comparison of the energy density and power density of NiCo-P-6/NF||AC ASC with other reported capacitors [27,28,42,[61][62][63][64][65][66]. NiCo-P-6/NF||AC ASC is superior to many other nickel-cobalt-based capacitors, regardless of energy density or power density.…”

Section: Resultsmentioning

confidence: 90%

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: 90%

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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“…As a rather simple and cost‐effective fabrication process, ball milling has been adopted to prepare metal phosphides, for example from the mixture of NaH 2 PO 2 or P powders and metal sources. As the required reaction cannot be completed in the high energy milling process, a post‐annealing treatment in an inert atmosphere is needed . For example, Ni 2 P was developed, from the mix of NaH 2 PO 2 ·H 2 O and Ni–precursor by high energy milling, followed by calcination at 500 °C for 1 h under a flow Ar atmosphere .…”

Section: Metal Phosphidesmentioning

confidence: 99%

“…Similarly, Ni 5 P 4 was formed by a high energy milling process, also, in combination with a post‐annealing treatment . CoP has also been prepared using the same strategy …”

Section: Metal Phosphidesmentioning

confidence: 99%

“…The ASC demonstrated an excellent performance of energy density of as high as 24 W h kg −1 at the power density of 0.3 kW kg −1 , together with excellent cycling stability with 97% of the specific capacitance being retained after 6000 cycles, showing the promise in energy storage application. The CoP electrode, prepared via a ball milling route, followed by a post‐annealing process, displayed excellent rate capability as well as good cycling stability. Very recently, Elshahawy et.al., reported a facile process to further improve the capacity and cycling stability of cobalt phosphides using a one‐step thermal sulfidization.…”

Section: Metal Phosphidesmentioning

confidence: 99%

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Metal Phosphides and Phosphates‐based Electrodes for Electrochemical Supercapacitors

Elshahawy

Guan

et al. 2017

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175

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Phosphorus compounds, such as metal phosphides and phosphates have shown excellent performances and great potential in electrochemical energy storage, which are demonstrated by research works published in recent years. Some of these metal phosphides and phosphates and their hybrids compare favorably with transition metal oxides/hydroxides, which have been studied extensively as a class of electrode materials for supercapacitor applications, where they have limitations in terms of electrical and ion conductivity and device stability. To be specific, metal phosphides have both metalloid characteristics and good electric conductivity. For metal phosphates, the open-framework structures with large channels and cavities endow them with good ion conductivity and charge storage capacity. In this review, we present the recent progress on metal phosphides and phosphates, by focusing on their advantages/disadvantages and potential applications as a new class of electrode materials in supercapacitors. The synthesis methods to prepare these metal phosphides/phosphates are looked into, together with the scientific insights involved, as they strongly affect the electrochemical energy storage performance. Particular attentions are paid to those hybrid-type materials, where strong synergistic effects exist. In the summary, the future perspectives and challenges for the metal phosphides, phosphates and hybrid-types are proposed and discussed.

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“…of Co 3 O 4 ) [26,27] and are a promising high electrical conductive electrode material of pseudocapacitors. This is because both of the oxidized and reduced cobalt exist in the cobalt phosphide alloys, rather than only oxidized cobalt in the cobalt oxides.…”

Section: Introductionmentioning

confidence: 99%

Liquid Phase Synthesis of CoP Nanoparticles with High Electrical Conductivity for Advanced Energy Storage

Zhang

Liu

et al. 2017

Journal of Nanomaterials

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Transition metal phosphide alloys possess the metalloid characteristics and superior electrical conductivity and are a kind of high electrical conductive pseudocapacitive materials. Herein, high electrical conductive cobalt phosphide alloys are fabricated through a liquid phase process and a nanoparticles structure with high surface area is obtained. The highest specific capacitance of 286 F g −1 is reached at a current density of 0.5 A g −1 . 63.4% of the specific capacitance is retained when the current density increased 16 times and 98.5% of the specific capacitance is maintained after 5000 cycles. The AC//CoP asymmetric supercapacitor also shows a high energy density (21.3 Wh kg −1 ) and excellent stability (97.8% of the specific capacitance is retained after 5000 cycles). The study provides a new strategy for the construction of high-performance energy storage materials by enhancing their intrinsic electrical conductivity.

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Facile synthesis of high electrical conductive CoP via solid-state synthetic routes for supercapacitors

Cited by 97 publications

References 42 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

Metal Phosphides and Phosphates‐based Electrodes for Electrochemical Supercapacitors

Liquid Phase Synthesis of CoP Nanoparticles with High Electrical Conductivity for Advanced Energy Storage

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