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(a) Schematic illustration of supercapattery device. (b) CV profile of NiMn(PO 4 ) 2 and AC at 30 mVs 1 in three cell assembly. (c) CV measurement of the device at different PW's in two cell assembly. (d) CV curves of the supercapattery device at various scan rates in two electrode configuration. (e) Discharging curves of the fabricated device at various current densities in two cell assembly. (f) Ragone plot represents the comparative study of this work with previously reported literature.
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The study divulges formation of nickel‐manganese phosphate and polyaniline (NiMn(PO4)2‐PANI)‐based ternary composites at different aspect ratios, synthesized via facile sonochemical method. The composite is utilized for high‐performance energy storage applications. The composite with 30 wt% PANI depicts the best electrochemical performance with max...
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Citations
... Wastewater contains various contaminants including heavy metals, organic chemicals, biodegradable forms, volatile and recycled organic compounds [1] as industrial, agricultural, municipal, environmental and global developments pollute water. Reducing contaminants is essential for healthy ecosystem, economic growth [2], medicine [3], sensing [4] biology [5] and human life [6][7][8]. According to a report 20 % of dyes used in textile industries are lost during synthesis and mixed in 50 ml of DI water. ...
Novel multinary nanocomposite using solvothermal method synthesized and studied for their use in supercapacitors and photocatalysis to degrade pollutants using characterization techniques XRD, SEM, EDX, FTIR, Raman, UV–Vis, Zeta potential and photoluminescence spectroscopy whereas electrochemical testing via EIS, CV and GCD analysis. Average crystalline size of 20.81 nm measured from XRD whereas EDX confirms GO suppression within nanocomposite. Mixed matrix like morphology is observable from SEM micrographs. The composite exhibited a band gap of 2.78 eV that could degrade MB dye at 94 % under direct sunlight consistent with first-order kinetics. Multiple distinctive peaks in FTIR spectra indicates various functional groups exsistence in the material alongwith zeta potential value of −17.9 mV. Raman spectra reveals D-band shifting to value 1361 cm⁻¹ while the G-band shifts to 1598 cm⁻¹ relative to GO. Furthermore electrochemical performance evaluated revealing electron transfer rate value 4.88 × 10⁻⁹ cms⁻¹ with maximum capacitance about 7182 Fg⁻¹ at a scan rate of 10 mVs⁻¹ respectively. Power density ranges from 3591.18 to 2163 W/kg and energy density from 299 to 120 Wh/Kg as measured from GCD analysis. These findings indicates that novel multinary nanocomposite holds potential as an electrode material in supercapacitors and as a sunlight-driven photocatalyst for the degradation of water-borne organic pollutants.
... The charge storage performance in RBs attributes to faradic redox reactions, which occur between electrolyte ions and the electrode materials. The materials such as hydroxides, oxides, phosphates, and metal sulfides like Ni (OH) 2 , Co (OH) 2 , V 2 O 5 , NiO, Co 3 O 4 , Ag 3 (PO 4 ), Ni 3 (PO 4 ) 2 , Mn 3 (PO 4 ) 2 , Ni 3 S 2 , MoS 2, and FeS 2 have been previously studied as battery grade material for electrodes [1][2][3][4][5][6][7][8][9][10][11]. RBs showed superior energy density, but their deprived power features as well as cyclic life (due to fast faradic redox reactions) restrict their widespread applications [12,13]. ...
Hybrid supercapacitors have gained upsurge interest in the energy storage application, but still have room to improve their specific power and energy limits with the implication of electrode materials that have superior electrochemical performance. Herein, we study the synergistic effect of the synthesized cobalt sulfide (CoS) along with manganese sulfide (MnS). The electrochemical outcomes were analyzed in three-electrode cell configuration. The cobalt manganese sulfide (CoS/MnS) composite demonstrates considerable better performance having specific capacity of 590.3 C g−1 (3 mV s−1) and 501.3 C g−1 (1.0 A g−1). The CoS/MnS electrode was further employed as a positive electrode material in a hybrid supercapacitor (supercapattery) along with activated carbon (negative electrode). The device delivers an energy density of 46 Wh kg−1 and holds a power density of 1705 W kg−1. Further, the hybrid device also retains a remarkable specific capacity of 94.57% after 1,000 continuous charging–discharging cycles at 3 A g−1. The semi-empirical approach was employed to further investigate the hybrid nature of the device, which separates the diffusive and capacitive contributions in experimental cyclic voltammetry. These results demonstrate CoS/MnS composite may have a promising implication as an electrode material for high-performance energy storage applications.
... Ahmed et al. (2021) synthesized the zinc oxide and zinc composite nano-fluids (ZnO@TiO 2 /DW) sonochemical method at 20 kHz and 750 W and evaluated the heat transfer properties. Alam et al. (2021) synthesized the binary composites (Ni-Mn (PO 4 ) 2 ) using a probe sonicator at 20 kHz and 900 kJ to study the energy storage capacity. Many other composites and hybrids of different functionalities were cited in the literature. ...
... Ahmed et al. (2021) synthesized the zinc oxide and zinc composite nano-fluids (ZnO@TiO 2 /DW) sonochemical method at 20 kHz and 750 W and evaluated the heat transfer properties. Alam et al. (2021) synthesized the binary composites (Ni-Mn (PO 4 ) 2 ) using a probe sonicator at 20 kHz and 900 kJ to study the energy storage capacity. Many other composites and hybrids of different functionalities were cited in the literature. ...
Keeping in view the toxicity of the Rhodamine B, the present study is designed to remediate the water loaded with toxic dyes using gallium oxide and gallium hybrids as photocatalyst. Precipitation coupled with sonochemical method is adopted for the synthesis of gallium oxide while the post grafting method is adopted for the synthesis of gallium hybrids with the indole and its derivatives. FTIR spectra showed the characteristic absorption bands of gallium oxide and gallium hybrids at 400-700 cm-1 and 1400-1600 cm-1. SEM and XRD showed the micro-sized rectangular rod-shaped gallium oxide with rhombohedral geometry. The average crystallite size of gallium hybrids was 26-32 nm calculated using the Debye Scherrer and Williamson-Hal models. The BET isotherm of gallium hybrids revealed the adsorption type-IV and hysteresis loop (H3) proposing multilayer and mesoporous structures with increase in surface area from 26 m2/g of gallium oxide to 31 m2/g of gallium-indole, 35 m2/g of gallium-methyl indole, and 37 m2/g of gallium-carboxylic indole. XPS showed the presence of gallium (3-14%), oxygen (28-32%), nitrogen (23-46%), and carbon (9-46%). The gallium oxide and gallium hybrids showed 47-72% optimum degradation of Rhodamine B under 2 h of illumination at pH 7 and 0.03 mg/L. The degradation rate followed a Langmuir-Hinshelwood model with R2 > 0.9.
... supercapacitor application using nickel manganese phosphate (see SI Table S2). [13,[64][65][66][67][68]. ...
... 13,[64][65][66][67][68]. Noteworthy, a symmetric solid-state device (SSS) offers high specific energy and power compared to a solidstate asymmetric system of Ni-Mn phosphate//rGO with +1.8 V potential window. ...
... The tracing which appears to be the shape of isosceles triangles as noted between 1 V and 0.4 V wherein the same trait of discharge pattern is found may be caused by the surface charge accumulation, and the consecutive redox events noted between 0.37 V and 0.14 V refer to the pseudocapacitive character of the electrode on account of its strong redox process thereby causing the increase in specific capacitance. 58 Thus the Faradaic mechanism has fully been enhanced by KI through its multiple redox species which in turn rise the capacitance. 59 The rise up in capacitance has been quantitatively observed that it runs from hundreds to thousands range @ 1 A g À1 that is, 674-2545 C g À1 . ...
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.
... Concerning charge storage mechanism electrochemical capacitors (Cs) are listed as EDLCs (electrical double-layer capacitors) and PCs (pseudo capacitors) [14][15][16][17][18][19].Both these types of capacitors are good in respect of excellent characteristics like good cyclic stability and high specific power (Ps) while there is a deficiency that they have low energy density. The properties of battery and SC can be combined into a single operating device named as a hybrid supercapacitor. ...
... The SCs exhibit high power and excellent cyclic stability [12]. Concerning charge storage mechanism electrochemical capacitors (Cs) are listed as EDLCs (electrical double-layer capacitors) and PCs (pseudo capacitors) [13][14][15][16][17][18]. EDLCs consist of two electrodes isolated by a non-conducting thin membrane which are completely immersed in an electrolytic solution. ...
The semiconducting transition metal dichalcogenide (TMDCs) materials, tungsten disulfide (WS2) and molybdenum disulfide (MoS2), holding a hexagonal structure, acquiring much attention for energy storage applications. Herein, various film thicknesses of silver sputtered molybdenum‑tungsten-disulfide (MoWS2@Ag) were deposited via magnetron sputtering technique. The surface and structural morphology of MoWS2@Ag samples were analyzed via scanning electron microscope, X-ray diffraction, energy dispersive X-ray, and atomic force microscopy. MoWS2@Ag exhibits the best performance in three electrode configuration by showing a maximum specific capacity of 367C/g. A hybrid supercapacitor device was assembled using MoWS2@Ag and activated carbon as the electrodes. The device possessed maximum energy and power of 35 Wh/kg and 5950 W/kg, respectively. To confirm the hybrid nature of the device, b values were calculated. The remarkable performance of MoWS2@Ag makes it an excellent electrode for hybrid supercapacitors.
... Alam et al. 23 demonstrated a capacity of 678 C/g at 0.4 A/g current density using a sonochemically produced NiMn(PO 4 ) 2 electrode. Alam et al. 66 synthesized NiMn(PO 4 ) 2 -PANI nanocomposites using a facile sonochemical process. They attained a high capacity of 847 C/g at a current density of 0.5 A/g in 1 M KOH. ...
... ).66 Also, solid-state device works have been reported for CC/NiCoP@NiCo-LDH//AC (57.0 Wh kg −1 , 850 W kg −1 ),72 Mn−Ni−S//Fe 2 O 3 @ rGO (76.6 Wh kg −1 , 325.4 W kg −1 ),29 CoMn 2 O 4 @NiCo−OH//VN@NC (68.83 Wh kg −1 , 2048 W kg −1 ),73 NiCoMn−OH//AC (43.2 Wh kg −1 , 790 W kg −1 ),74 and cobalt−manganese phosphate//rGO (13.3 Wh kg −1 , 1640 W kg −1 ).33 The above-mentioned reported asymmetric aqueous and solid-state devices exhibit greater energy density values than that in the present work due to the different electroactive materials (like Co, Fe, and vanadium nitride (VN)) providing various charge storage mechanisms to enhance the electrochemical performance. ...
The limited energy density and cyclability of supercapacitors are
major roadblocks to their development as energy storage devices. To address these
issues, a binder-free nickel−manganese (Ni−Mn) phosphate composite (NMP
series) microarchitecture has been synthesized by the hydrothermal method on a
nickel foam (NF) substrate using various urea dosages. Due to the influence of
urea, microrod-/microplate-like morphologies of NMP series thin films evolved to
micropetals. This study demonstrates a synergy between Ni and Mn metal ions
and also the influence of different urea contents on the physicochemical properties
of mesoporous NMP series thin films. Notably, the NMP-4 microarchitecture has a
large surface area (7.5 m2 g−1), which provides more electroactive sites in
electrochemical measurements. Accordingly, in the NMP series electrodes, the NMP-4 thin film demonstrated high electrochemical
properties (the maximum specific capacity was found to be 901 C/g at a 5 mV/s scan rate) and retained 127% capacity over 6000
cycles, indicating good durability with a well-preserved microstructure throughout the cycling. Furthermore, a flexible asymmetric
solid-state (FASS) supercapacitor was designed utilizing NMP-4 and reduced graphene oxide (rGO) as a cathode and an anode,
respectively, in the poly(vinyl alcohol)-KOH (PVA-KOH) gel electrolyte with an extended operational voltage of +1.8 V. This FASS
device provides a high specific capacity (192 C/g at 0.6 A/g current density), supreme energy density (48.2 Wh kg−1) at a power
density of 575 W kg−1, and a desirable longevity of 108% over 5000 cycles. Moreover, the FASS device also demonstrated its
practical applicability. The long-term stability suggests that the binder-free urea-assisted Ni−Mn phosphate composite is a good
candidate for energy storage devices.
... Numerous approaches have been utilized for the synthesis of nanomaterials which includes electrodeposition, solvothermal, chemical precipitation, sonochemical, and hydrothermal techniques. [36][37][38][39][40] The sonochemical approach starts the reaction through acoustic cavitation process which effect the particle size and its surface morphology due to high collision rate. 41 This method is a controlled process in which different parameters can be set to obtain the required product and is very effective to get uniform size nanoparticles with minimum aggregation. ...
Hybrid batteries a well-known electrochemical energy storage technology that comprises of both supercapacitor and battery characteristics at the same time. The hybrid batteries can fulfill the current global energy quest as they have obtained high energy density (battery) and high-power characteristics (supercapacitor). Here, we have demonstrated the effect of synthesis technique on the electrochemical performance of manganese sulfide (MnS) by mainly opting sonochemical and hydrothermal approach. Initially, the electrochemical characterizations of MnS were analyzed in three electrode setup. Electrochemical measurements in particular cyclic voltammetry, galvanostatic charge discharge, and impedance spectroscopy were studied to scrutinize the nature of the electrodes. The hydrothermally synthesized MnS shows battery grade nature with superior specific capacity of 608.08 C/g at 2.2 A/g. On account of high electrochemical performance, the prominent electrode was employed with activated carbon to explore hybrid battery applications. The hybrid device (S2//AC) has revealed exceptional specific capacity of 265 C/g at 2 A/g and 519.8 C/g at 3 mV/s. Also, the S2//AC device manifests remarkable specific power and energy of 1700 W/kg and 62.5 Wh/kg, correspondingly. Furthermore, a simulation approach was used to evaluate the contribution of capacitive and diffusive by applying Dunn's model. The nature of the asymmetric device was also confirmed by calculating its b fitting values. This study shows that the MnS has the potential to be utilized for efficient energy storage systems.
