Formation of three-dimensional hierarchical pompon-like cobalt phosphide hollow microspheres for asymmetric supercapacitor with improved energy density

Ding, Li; Zhang, Kexiang; Chen, Lin; Yu, Zhaozhe; Zhao, Yunyun; Zhu, Guisheng; Chen, Guangcun; Yan, Dongliang; Xu, Hui; Yu, Aibing

doi:10.1016/j.electacta.2018.12.180

Cited by 98 publications

(23 citation statements)

References 54 publications

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“…S4a (online), there is a low-angle characteristic peak at around 10.4°i n the pattern of NiCoG-N, which is corresponding to the lamellar structure of Ni-Co glycerate [32]. The precursors of NiCoG-80 and NiCoG-150 display three weak peaks located at 18 ) are resulting from the decomposition of glycerinum and the similar results have also been reported in previous work [33,38]. In addition, as the continuously increasing temperature, NiCoG-220 shows obvious diffraction peaks belonging to the phases of Ni(OH) 2 (PDF-74-2075) and Co(OH) 2 (PDF-74-1057).…”

Section: Temperature-regulated Morphology Evolution Of Ni-co Precursorssupporting

confidence: 84%

Facile self-template fabrication of hierarchical nickel-cobalt phosphide hollow nanoflowers with enhanced hydrogen generation performance

et al. 2019

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Section: Temperature-regulated Morphology Evolution Of Ni-co Precursorssupporting

confidence: 84%

Facile self-template fabrication of hierarchical nickel-cobalt phosphide hollow nanoflowers with enhanced hydrogen generation performance

et al. 2019

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“…Usual techniques to synthesize transition metal phosphide is via plasma-enhanced CVD (PECVD) using PH 3 plasma (Liang et al, 2017) or multistep hydrothermal techniques (Zhou et al, 2015;Ding et al, 2019) via metal oxide/hydroxide intermediate followed by thermal annealing. Using the PECVD approach restricts the phosphorization on the material surface rather than bulk conversion.…”

Section: Synthesis Of Hexagonal Copper Phosphide Plateletsmentioning

confidence: 99%

Three-Dimensional Graphene-Decorated Copper-Phosphide (Cu3P@3DG) Heterostructure as an Effective Electrode for a Supercapacitor

Kumar

Aziz

Kumar³

et al. 2020

Front. Mater.

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Transition metal phosphides already emerged with great interest due to their energy storage capacitance, superior metalloid characteristics, and decent electrical conductivity. To achieve a commercially viable outcome, these electrodes are fabricated with interconnected carbonaceous materials. Herein, we have synthesized hexagonal copper phosphide (Cu 3 P) platelets using chemical vapor deposition (CVD) and integrated it with highly conducting three-dimensional graphene (3DG), leading to a nanohybrid (Cu 3 P@3DG) as a coulombic efficient supercapacitor. This nanohybrid has exhibited a specific capacitance (C sp) of 1,095.85 F/g at 10 mV/s scan rate along with a cycling stability of 95% capacitive retention after 3,000 cycles at a current density of 8.97 A/g. The C sp is almost four times higher and the stability is 1.2 times higher compared to the bare Cu 3 P platelets. We have fabricated an asymmetric supercapacitor (ASC) using Cu 3 P@3DG on graphite as cathode and activated carbon (AC) on graphite as anode (Cu 3 P@3DG//AC) that has shown high specific capacity (108.78 F/g), energy density (8.23 Wh/kg), and power density (439.6 W/kg). Moreover, this ASC has exhibited an excellent life cycle (5,500 consecutive charge-discharge with 96% coulombic efficiency). Therefore, the proposed all-solid-state hybrid device can be considered as a route for next-generation high-performing energy storage devices.

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“…The 82.8 % retention of the initial capacity further demonstrating the excellent rate capability of Ni 2 P/C// AC. Derived from GCD curves of Figure 6b, the Ragone plots (Figure 6d) 8,25,27,38,46,47] Figure 6e shows the long cycle stability of sample-0, sample-0.2, sample-0.4 and sample-0.6 at a current density of 10 A/g and the retention rate was calculated based on the highest specific capacity during the charge and discharge cycles, and after 5000 cycles, the capacity retention of sample-0.4 can still maintain 95 %. Apparently, the cycling stability of sample-0.4 is much better than sample-0 (84 %), sample-0.2 (91 %) and sample-0.6 (80 %).…”

Section: Electrochemical Performance Of the Ni 2 P/c//ac Hybrid Asymmmentioning

confidence: 99%

“…[24] Metal phosphides prepared by phosphating MOF materials usually possess porous morphologies with high specific surface area and excellent conductivity. [25] Therefore, converting MOF to metal phosphide sheds light on the way of synthesizing hollow structures based on the Kirendall effect. [26] The prevalent preparation route for nickel phosphide is by sintering MOF in the presence of sodium hypophosphite (NaH 2 PO 2 ).…”

Section: Introductionmentioning

confidence: 99%

“…Metal‐organic framework, a porous crystalized material composed of metal atoms and organic ligands via strong coordinative bonds quickly entered the field as a sacrificial precursor that can be used to effectively synthesize controllable microporous structures with large specific surface area and high pore volume . Metal phosphides prepared by phosphating MOF materials usually possess porous morphologies with high specific surface area and excellent conductivity . Therefore, converting MOF to metal phosphide sheds light on the way of synthesizing hollow structures based on the Kirendall effect …”

Section: Introductionmentioning

confidence: 99%

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Metal‐Organic Framework Derived Ni₂P/C Hollow Microspheres as Battery‐Type Electrodes for Battery‐Supercapacitor Hybrids

Liu

Wang

et al. 2019

ChemElectroChem

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Nickel phosphide (Ni 2 P/C) hollow microspheres were synthesized via a facile two-step route based on metal-organic framework (MOF) precursors. Unlike direct phosphating the MOF by calcination that would damage the MOF structure and that would form multiple phases, solvothermal method was able to convert the Ni-based MOF to one-pure-phase nickel phosphide with the MOF skeleton maintained, as suggested by XRD, XPS, and SEM. When using as the battery-supercapacitor hybrids electrode material, the optimized Ni 2 P/C exhibited the specific capacity 670.4 C/g (1676 F/g) at 1 A/g in a threeelectrode system, and a maximum energy density 42.74 Wh/kg at 764.23 W/kg in an asymmetric supercapacitor. It also delivered an energy density of 35.39 Wh/kg at 7000 W/kg with the rate capability retention of 92 % after 5000 cycles. The high specific surface area and the increased amount of electrochemically active sites endowed by the unique morphology, together with the low charge transfer resistance all contribute to the excellent electrochemical performance of the Ni 2 P/C material. These also indicate that solvothermal method is feasible in converting MOF to metal phosphide for the application in energy storage and conversion systems.[a] Prof.

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Formation of three-dimensional hierarchical pompon-like cobalt phosphide hollow microspheres for asymmetric supercapacitor with improved energy density

Cited by 98 publications

References 54 publications

Facile self-template fabrication of hierarchical nickel-cobalt phosphide hollow nanoflowers with enhanced hydrogen generation performance

Facile self-template fabrication of hierarchical nickel-cobalt phosphide hollow nanoflowers with enhanced hydrogen generation performance

Three-Dimensional Graphene-Decorated Copper-Phosphide (Cu3P@3DG) Heterostructure as an Effective Electrode for a Supercapacitor

Metal‐Organic Framework Derived Ni₂P/C Hollow Microspheres as Battery‐Type Electrodes for Battery‐Supercapacitor Hybrids

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Formation of three-dimensional hierarchical pompon-like cobalt phosphide hollow microspheres for asymmetric supercapacitor with improved energy density

Cited by 98 publications

References 54 publications

Facile self-template fabrication of hierarchical nickel-cobalt phosphide hollow nanoflowers with enhanced hydrogen generation performance

Facile self-template fabrication of hierarchical nickel-cobalt phosphide hollow nanoflowers with enhanced hydrogen generation performance

Three-Dimensional Graphene-Decorated Copper-Phosphide (Cu3P@3DG) Heterostructure as an Effective Electrode for a Supercapacitor

Metal‐Organic Framework Derived Ni2P/C Hollow Microspheres as Battery‐Type Electrodes for Battery‐Supercapacitor Hybrids

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Metal‐Organic Framework Derived Ni₂P/C Hollow Microspheres as Battery‐Type Electrodes for Battery‐Supercapacitor Hybrids