High-performance asymmetric supercapacitor based on flowery nickel-zinc phosphate microspheres with carbon dots

Guo, Manying; Wang, Shaohua; Zhao, Lijun; Guo, Zuoxing

doi:10.1016/j.electacta.2018.08.119

Cited by 40 publications

(17 citation statements)

References 48 publications

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“…A NiCo(PO 4 ) 3 /GF//AC hybrid supercapacitor device was fabricated by Mirghni et al and achieved the highest energy density of 34.8 Wh kg –1 and a power density of 377 W kg –1 . Also, a Ni–Zn phosphate/carbon dots//AC asymmetric device was assembled by Guo et al., which demonstrated an energy density of 33.7 Wh kg –1 at an 824.9 W kg –1 power density. Tang et al fabricated an asymmetric supercapacitor of Co x Ni (3– x ) (PO 4 ) 2 //AC, which exhibits a maximum energy density of 45.8 Wh kg –1 at the power density of 42.4 W kg –1 .…”

Section: Resultsmentioning

confidence: 99%

Fabrication of a High-Performance Hybrid Supercapacitor Based on Hydrothermally Synthesized Highly Stable Cobalt Manganese Phosphate Thin Films

et al. 2021

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In the present study, cobalt manganese phosphate (H-CMP-series) thin films with different compositions of Co/Mn are prepared on stainless steel (SS) substrate via a facile hydrothermal method and employed as binder-free cathode electrodes in a hybrid supercapacitor. The XRD study reveals a monoclinic crystal structure, and the FE-SEM analysis confirmed that H-CMP-series samples displayed a nano/microarchitecture (microflowers to nanoflakes) on the surface of SS substrate with excess available surfaces and unique sizes. Interestingly, the synergy between cobalt and manganese species in the cobalt manganese phosphate thin film electrode demonstrates a maximum specific capacitance of 571 F g–1 at a 2.2 A g–1 current density in 1 M KOH. Besides, the nano/microstructured cobalt manganese phosphate was able to maintain capacitance retention of 88% over 8000 charge–discharge cycles. More importantly, the aqueous/all-solid-state asymmetric supercapacitor manufactured with the cobalt manganese phosphate thin film as the cathode and reduced graphene oxide (rGO) as the anode displays a high operating potential window of 1.6 V. The aqueous asymmetric device exhibited a maximum specific capacitance of 128 F g–1 at a current density of 1 A g–1 with an energy density of 45.7 Wh kg–1 and a power density of 1.65 kW kg–1. In addition, the all-solid-state asymmetric supercapacitor device provides a high specific capacitance of 37 F g–1 at 1 A g–1 with 13.3 Wh kg–1 energy density and 1.64 kW kg–1 power density in a polymer gel (PVA-KOH) electrolyte. The long cyclic life of both devices (87 and 84%, respectively, after 6000 cycles) and practical demonstration of the solid-state device (lighting of a LED lamp) suggest another alternative choice for cathode materials to develop stable energy storage devices with high energy density. Furthermore, the aforementioned study paves the way to investigate phosphate-based materials as a new class of materials for supercapacitor applicability.

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Section: Resultsmentioning

confidence: 99%

Fabrication of a High-Performance Hybrid Supercapacitor Based on Hydrothermally Synthesized Highly Stable Cobalt Manganese Phosphate Thin Films

et al. 2021

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“…The specific capacitances are calculated using the relation

C = \frac{I \times Δ t}{m \times Δ V} {F g}^{- 1}

where “ I ” accounts for the current density ( A ), “Δ t ” is the discharge time (s) from the galvanostatic charge‐discharge curve, “ m ” is the active mass of the material (g) coated on the current collector, and “Δ V ” is the potential window (volts). The specific capacitance can also be measured from the CV plot according to the following equation

C = \int \frac{I d t}{2 m V ν d V} {F g}^{- 1}

where “ I d t ” is the integral area of the CV curve with respect to current, “ V ” is the voltage window in volts, and “ ν ” is the scan rate (mV s −1 ).…”

Section: Resultsmentioning

confidence: 99%

“…where "I" accounts for the current density (A), "Δt" is the discharge time (s) from the galvanostatic charge-discharge curve, "m" is the active mass of the material (g) coated on the current collector, and "ΔV" is the potential window (volts). The specific capacitance can also be measured from the CV plot according to the following equation [18] C ¼…”

Section: Resultsmentioning

confidence: 99%

“…Wang et al made a NH 4 CoNiPO 4 ·H 2 O//AC asymmetric device and arrived at an energy density of 46.2 W h kg −1 with stability of 83% of capacity after 3000 cycles at 5 A g −1 . Guo et al attempted Ni–Zn phosphate microspheres with a carbon dot//AC system and obtained a specific capacitance value of 89.2 F g −1 with an energy density of 33.7 W h kg −1 and 90.6% capacity retention after 6000 cycles at 2 A g −1 . Zhang et al tried with reduced graphene oxide (rGO)‐modified Ni–Co phosphate microplates and achieved a high specific capacitance value of 1451 F g −1 at 1 A g −1 and capacity retention of 81% after 5000 cycles .…”

Section: Introductionmentioning

confidence: 99%

“…[17] Guo et al attempted Ni-Zn phosphate microspheres with a carbon dot//AC system and obtained a specific capacitance value of 89.2 F g À1 with an energy density of 33.7 W h kg À1 and 90.6% capacity retention after 6000 cycles at 2 A g À1 . [18] Zhang et al tried with reduced graphene oxide (rGO)-modified Ni-Co phosphate microplates and achieved a high specific capacitance value of 1451 F g À1 at 1 A g À1 and capacity retention of 81% after 5000 cycles. [19] Consequently hybrid supercapacitors coupled with carbon electrodes and pseudocapacitive electrodes have been advocated to be potential candidates for energy storage applications.…”

Section: Introductionmentioning

confidence: 99%

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Microwave Synthesis of Zinc Ammonium Phosphate/Reduced Graphene Oxide Hybrid Composite for High Energy Density Supercapacitors

Raja

Vickraman

Simon

et al. 2019

Physica Status Solidi (a)

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Herein, zinc ammonium phosphate (ZAP) is interluded with reduced graphene oxide (rGO) as a composite (ZAPG2) via microwave synthesis route. The ZAPG2 is investigated by X‐ray diffraction (XRD), Raman, scanning electron microscopy (SEM), X‐ray photoelectron spectroscopy (XPS), and electrochemical studies (cyclic voltammetry, galvanostatic charge discharge, and impedance). The Raman analysis confirms the graphitization of rGO in the ZAP, and XPS confirms the elemental composition. The SEM morphology reveals that rGO spreads over the micropyramidal envelope of ZAP. The ZAPG2//rGO device delivers a higher specific capacitance of 356 F g−1 for 5 m than in 3 m H2SO4 (133.7 F g−1) electrolyte at a current density of 1 A g−1 within the potential window of 1.8 V. The cyclic stability of 86.1% for 3 m and 66.6% for 5 m are noted for 5000 charge–discharge cycles. ZAPG2//rGO combination is the first attempt at facilitating better specific capacitances on device performance. This parallels in energy density, as 59.9 W h kg−1 in 3 m and 153.4 W h kg−1 in 5 m driving for the same power density of 448.3 W kg−1 at 1 A g−1, which suggests the hybrid composite device's practicality for high‐energy supercapacitor applications.

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Cucumis melo var agrestis based activated carbon/manganese ammonium phosphate @ carbon hollow sphere in dual redox additives for supercapattery device

2023

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The electrochemical performance of manganese ammonium phosphate (MnAP) intercalated carbon hollow sphere (CS) at four mass variates has been investigated. The XRD, Raman, SEM, and electrochemical studies reveal that only 50 mg of CS strongly intercalating with MnAP (MnAP@CS2) is observed. The half‐cell test has shown the profound pseudocapacitance for 50 mg intercalated MnAP@CS2 hybrid composite (2545 C g−1 @ 1 A g−1 in KI added 2 M H2SO4) and confirms the imminence of optimal mass concentration of CS with MnAP and the effect of KI redox additive towards enhancing the specific capacity. The supercapattery hybrid device (SBHD) using MnAP@CS2 as the positive electrode and as newly synthesized activated carbon (AC) derived from cucumis melo var agrestis as a negative electrode is examined in pure 3 M H2SO4 and in 0.025 M KI/VOSO4 dual redox additive added 3 M H2SO4. The exquisite complacency requisite on specific capacitance (536 C g−1/149 mAh g−1 @ 1 A g−1 @ 20 A g−1), energy density (80 Wh g−1), and capacity retention (89% for 5000 charge‐discharge cycles) have profusely advocating MnAP@CS2 and AC for SBH device applications.

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High-performance asymmetric supercapacitor based on flowery nickel-zinc phosphate microspheres with carbon dots

Cited by 40 publications

References 48 publications

Fabrication of a High-Performance Hybrid Supercapacitor Based on Hydrothermally Synthesized Highly Stable Cobalt Manganese Phosphate Thin Films

Fabrication of a High-Performance Hybrid Supercapacitor Based on Hydrothermally Synthesized Highly Stable Cobalt Manganese Phosphate Thin Films

Microwave Synthesis of Zinc Ammonium Phosphate/Reduced Graphene Oxide Hybrid Composite for High Energy Density Supercapacitors

Cucumis melo var agrestis based activated carbon/manganese ammonium phosphate @ carbon hollow sphere in dual redox additives for supercapattery device

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