Sodium‐Doped Mesoporous Ni2P2O7 Hexagonal Tablets for High‐Performance Flexible All‐Solid‐State Hybrid Supercapacitors

Wei, Chengzhen; Cheng, Cheng; Wang, Shanshan; Xu, Yang; Wang, Jindi; Pang, Huan

doi:10.1002/asia.201500335

Cited by 83 publications

(61 citation statements)

References 46 publications

(101 reference statements)

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“…The peak positions and binding energy gap between the two signals clearly demonstrate the existence of Ba 2+ . [39][40][41] Moreover, the HRXPS spectra in 42 During the process of fabrication of Ba x Ni 3Àx (PO 4 ) 2 nanober, we noticed that the content of precursor Ni(NO 3 ) 2 plays a key role in the formation of nanobers. Fig.…”

Section: Resultsmentioning

confidence: 98%

High capacitive amorphous barium nickel phosphate nanofibers for electrochemical energy storage

et al. 2016

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Ultrafine amorphous Ba x Ni 3Àx (PO 4 ) 2 (0 < x < 3) nanofibers are synthesized for the first time through a facile cation exchange reaction method at room temperature. Both the phase transformation and growing process of the nanofibers are systematically investigated. A dramatic morphology transformation from Ba 3 (PO 4 ) 2 flakes to Ba x Ni 3Àx (PO 4 ) 2 nanofibers with the addition of Ni 2+ ions is observed. The as-prepared nanofiber material shows a diameter less than 10 nanometers and length of several micrometers. The material possesses a BET surface area of 64.8 m 2 g À1 . When it is used as a supercapacitor electrode material, specific capacitances as high as 1058 F g À1 at 0.5 A g À1 and 713 F g À1 at 5 A g À1 are achieved, indicating the promising energy storage property of this material.

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Section: Resultsmentioning

confidence: 98%

High capacitive amorphous barium nickel phosphate nanofibers for electrochemical energy storage

et al. 2016

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“…In this view, recently, metal pyrophosphate has attracted significant attention due to its higher theoretical capacitance and facile synthesis procedures. Up to now, several transition metal pyrophosphates including CoP 2 O 7, MnP 2 O 7, Ni 2 P 2 O 7 and TiP 2 O 7 were tried as active electrode material for supercapacitors (SCs) . Nevertheless, it exhibits poor cycling stability and limited rate performance, which may be ascribed to the lower electrical conductance and irreversible phase transformation.…”

Section: Introductionmentioning

confidence: 99%

Carbon Quantum Dot Incorporated Nickel Pyrophosphate as Alternate Cathode for Supercapacitors

2020

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In spite of its large theoretical capacitance, the crystal structure of transition metal pyrophosphates frequently endures sluggish charge transfer and volume expansion leading to severe structural instability which may be ascribed to low power density and constant intercalation and deintercalation of ions in the matrix. Due to the stated facts, it resulted in quick capacity degradation and limited the overall performance of the energy device. To overcome the stated facts, we report the electrochemical charge storage performances of Nickel pyrophosphate/Carbon quantum dot (Ni2P2O7/CQD) nanocomposites. Here, we adopted a facile technique to prepare biowaste derived CQD and composited it with transition metal (Nickel) pyrophosphate. Incorporation of carbon quantum dots not only increased the specific capacitance than bare, besides, it also provides a long‐run cyclability. The addition of CQDs to the matrix favors rapid charge transfer and buffered the mechanical stress of nanocomposite. Using power law, the capacitance contribution from diffusion‐controlled and capacitive type mechanisms to the total specific capacitance was also elucidated. Hence the cost‐effective, facile synthesis method and favorable redox reaction empowered with voltage would have a potential application in high energy devices.

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“…However, very few reports are available on metal pyrophosphates as supercapacitor electrodes with limited performance. For instance, Wei et al prepared sodium‐doped Ni 2 P 2 O 7 hexagonal tablets by a simple calcination method and obtained a maximum capacitance of 557.7 F g −1 at a current density of 1.2 A g −1 . Khan et al reported a maximum capacitance of 580 F g −1 (1 A g −1 ) for Co 2 P 2 O 7 ‐based electrode in a redox‐active electrolyte.…”

Section: Introductionmentioning

confidence: 99%

Self‐Assembled Nickel Pyrophosphate‐Decorated Amorphous Bimetal Hydroxides 2D‐on‐2D Nanostructure for High‐Energy Solid‐State Asymmetric Supercapacitor

Chodankar

Dubal

et al. 2019

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To obtain a supercapacitor with a remarkable specific capacitance and rate performance, a cogent design and synthesis of the electrode material containing abundant active sites is necessary. In present work, a scalable strategy is developed for preparing 2D‐on‐2D nanostructures for high‐energy solid‐state asymmetric supercapacitors (ASCs). The self‐assembled vertically aligned microsheet‐structured 2D nickel pyrophosphate (Ni2P2O7) is decorated with amorphous bimetallic nickel cobalt hydroxide (NiCo‐OH) to form a 2D‐on‐2D nanostructure arrays electrode. The resulting Ni2P2O7/NiCo‐OH 2D‐on‐2D array electrode exhibits peak specific capacity of 281 mA hg−1 (4.3 F cm−2), excellent rate capacity, and cycling stability over 10 000 charge–discharge cycles in the positive potential range. The excellent electrochemical features can be attributed to the high electrical conductivity and 2D layered structure of Ni2P2O7 along with the Faradic capacitance of the amorphous NiCo‐OH nanosheets. The constructed Ni2P2O7/NiCo‐OH//activated carbon based solid‐state ASC cell operates in a high voltage window of 1.8 V with an energy density of 78 Wh kg−1 (1.065 mWh cm−3) and extraordinary cyclic stability over 10 000 charge–discharge cycles with excellent energy efficiency (75%–80%) over all current densities. The excellent electrochemical performance of the prepared electrode and solid‐state ASC device offers a favorable and scalable pathway for developing advanced electrodes.

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Sodium‐Doped Mesoporous Ni₂P₂O₇ Hexagonal Tablets for High‐Performance Flexible All‐Solid‐State Hybrid Supercapacitors

Cited by 83 publications

References 46 publications

High capacitive amorphous barium nickel phosphate nanofibers for electrochemical energy storage

High capacitive amorphous barium nickel phosphate nanofibers for electrochemical energy storage

Carbon Quantum Dot Incorporated Nickel Pyrophosphate as Alternate Cathode for Supercapacitors

Self‐Assembled Nickel Pyrophosphate‐Decorated Amorphous Bimetal Hydroxides 2D‐on‐2D Nanostructure for High‐Energy Solid‐State Asymmetric Supercapacitor

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