Carbon nanotubes (CNTs) were polymerized with polyaniline (PANI) via an in-situ polymerization approach. These functionalized CNTs (PANI-CNTs) were added in various concentrations to the sono-chemically synthesized Co-Ni binary transition metals phosphate (CoNi(PO4)2) to ultimately have their nanocomposites. Electron microscopy (SEM & HRTEM) was employed to reveal the morphology and microscopic features. The structural evaluation of metal phosphate and PANI/CNTs was done by X-ray diffractometer analysis, whereas chemical grafting of cobalt nickel phosphate (CoNi(PO4)2) was done by Fourier transformed infrared spectroscopy and Raman spectroscopy. The hierarchical structured CoNi(PO4)2 with 40 mg PANI/CNTs mass (CNP40) presented enhanced specific capacity of 1268 Cg−1 (2136 F g−1 at 1.5 F g−1) with excellent diffusive behavior (b = 0.5). A resulted hybrid supercapacitor device consisting of CNP40 as +ve electrode and activated carbon AC) as −ve electrode, presented excellent energy density of ∼87 Whkg−1 with good power density of 680 W kg−1 maintained to 32.9 W kg−1 (@ 20,400 W kg−1) with 37% rate performance, and excellent cyclic performance (∼100%) after 5000 charge-discharge cycles. Furthermore, capacitive-diffusive analysis revealed that the device showed 55% diffusive and 45% capacitive behaviour. This improved electrochemical performance might be attributed mainly to the uniform and hierarchical chemical grafted morphology of the novel combination of binary phosphates and PANI functionalized CNTs in the nanocomposite obtained via a rather different sonochemical approach.
SuLGaoLDuQ, et al.Formation of micron-sized nickel cobalt sulfide solid spheres with high tap density for enhancing pseudocapacitive properties. ACS Sustain Chem Eng2017; 5: 9945–9954.
2.
ZhengY-ZDingH-YZhangM-L. Preparation and electrochemical properties of nickel oxide as a supercapacitor electrode material. Mater Res Bull2009; 44: 403–407.
3.
WangHYiHChenX, et al.Asymmetric supercapacitors based on nano-architectured nickel oxide/graphene foam and hierarchical porous nitrogen-doped carbon nanotubes with ultrahigh-rate performance. J Mater Chem A2014; 2: 3223–3230.
4.
KatkarPKMarjeSJPujariSS, et al.Single-pot hydrothermal synthesis of manganese phosphate microrods as a cathode material for highly stable flexible solid-state symmetric supercapacitors. Synth Met2020; 267: 116446.
5.
AgarwalASankapalBR. Ultrathin Cu2P2O7 nanoflakes on stainless steel substrate for flexible symmetric all-solid-state supercapacitors. Chem Eng J2021; 422: 130131.
6.
FrackowiakEBéguinF. Carbon materials for the electrochemical storage of energy in capacitors. Carbon N Y2001; 39: 937–950.
7.
JowJJLeeHJChenHR, et al.Anodic, cathodic and cyclic voltammetric deposition of ruthenium oxides from aqueous RuCl3 solutions. Electrochim Acta2007; 52: 2625–2633.
8.
XiaAYuWYiJ, et al.Synthesis of porous δ-MnO 2 nanosheets and their supercapacitor performance. J Electroanal Chem2019; 839: 25–31.
9.
WangYGXiaYY. A new concept hybrid electrochemical surpercapacitor: carbon/LiMn 2O4 aqueous system. Electrochem Commun2005; 7: 1138–1142.
10.
ChenYKeXChengY, et al.Boosting the electrochemical performance of 3D composite lithium metal anodes through synergistic structure and interface engineering. Energy Storage Mater2020; 26: 56–64.
11.
VijayakumarAUAloniNVeettilVT, et al.Combinatorial Synthesis and Screening of a Ternary NiFeCoO x Library for the Oxygen Evolution Reaction. ACS Appl Energy Mater. Epub ahead of print 28 March 2022. DOI: https://doi.org/10.1021/acsaem.1c03845.
12.
XuLXiYSunX, et al.Hierarchically novel bead-curtain-like zinc-cobalt sulfides arrays toward high energy density hybrid supercapacitors via morphology engineering. J Power Sources489. Epub ahead of print 2021. DOI: https://doi.org/10.1016/j.jpowsour.2021.229535.
13.
WeiBMingFLiangH, et al.All nitride asymmetric supercapacitors of niobium titanium nitride-vanadium nitride. J Power Sources481. Epub ahead of print 2021. DOI: https://doi.org/10.1016/j.jpowsour.2020.228842.
14.
ZhangLDingQHuangY, et al.Flexible hybrid membranes with Ni(OH)2 nanoplatelets vertically grown on electrospun carbon nanofibers for high-performance supercapacitors. ACS Appl Mater Interfaces2015; 7: 22669–22677.
WangS-WMaoMCaoY, et al.Novel cuboid-like cobalt nickel phosphate/manganese dioxide/multi-walled carbon nanotubes composites as binder-free electrodes for high-performance supercapacitors. Inorg Chem Commun114. Epub ahead of print 2020. DOI: https://doi.org/10.1016/j.inoche.2020.107822.
17.
MeiPKimJKumarNA, et al.Phosphorus-based mesoporous materials for energy storage and conversion. Joule2018; 2: 2289–2306.
18.
IqbalMZSiddiqueSShaheenM, et al.Role of Ag and Cu as an interfacial layer on the electrochemical performance of Ni/Ag/ Co3(PO4)2 and Ni/Cu/Co3(PO4)2 electrodes for hybrid energy storage devices. Ceram Int. Epub ahead of print 18 February 2022. DOI: https://doi.org/10.1016/j.ceramint.2022.02.103.
19.
LiuGYangYLuX, et al.Fully active bimetallic phosphide Zn0.5Ge0.5P: a novel high-performance anode for Na-Ion batteries coupled with diglyme-based electrolyte. ACS Appl Mater Interfaces2022; 14: 31803–31813.
20.
WilsonSTLokBMMessinaCA, et al.Aluminophosphate molecular sieves: a new class of microporous crystalline inorganic solids. J Am Chem Soc1982; 104: 1146–1147.
21.
PangHZhangYZRunZ, et al.Amorphous nickel pyrophosphate microstructures for high-performance flexible solid-state electrochemical energy storage devices. Nano Energy2015; 17: 339–347.
22.
HeYYangXBaiY, et al.Vanadyl phosphate/reduced graphene oxide nanosheet hybrid material and its capacitance. Electrochim Acta2015; 178: 312–320.
23.
IqbalMZAbbasiUAlzaidM. Cobalt manganese phosphate and sulfide electrode materials for potential applications of battery-supercapacitor hybrid devices. J Energy Storage50. Epub ahead of print 2022. DOI: https://doi.org/10.1016/j.est.2022.104632.
24.
PujariSSKadamSAMaYR, et al.Hydrothermally synthesized nickel copper phosphate thin film cathodes for high-performance hybrid supercapacitor devices. J Energy Storage52. Epub ahead of print 2022. DOI: https://doi.org/10.1016/j.est.2022.105037.
25.
OmarFSNumanADuraisamyN, et al.Ultrahigh capacitance of amorphous nickel phosphate for asymmetric supercapacitor applications. RSC Adv2016; 6: 76298–76306.
26.
MarjeSJPatilVVParaleVG, et al.Microsheets like nickel cobalt phosphate thin films as cathode for hybrid asymmetric solid-state supercapacitor: influence of nickel and cobalt ratio variation. Chem Eng J2021; 429: 132184.
27.
IqbalMZKhanJSiddiqueS, et al.Optimizing electrochemical performance of sonochemically and hydrothermally synthesized cobalt phosphate for supercapattery devices. Int J Hydrog Energy2021; 46: 15807–15819.
28.
LiuMShangNZhangX, et al.Microwave synthesis of sodium nickel-cobalt phosphates as high-performance electrode materials for supercapacitors. J Alloys Compd2019; 791: 929–935.
29.
ShannonRD. Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides. Acta Crystallogr Sect A1976; 32: 751–767.
30.
IqbalBLaybournAUl-HamidA, et al.Size-controlled synthesis of spinel nickel ferrite nanorods by thermal decomposition of a bimetallic Fe/Ni-MOF. Ceram Int2021; 47: 12433–12441.
31.
LiXElshahawyAMGuanC, et al.Metal phosphides and phosphates-based electrodes for electrochemical supercapacitors. Small2017; 13: 1701530.
32.
ZhongCDengYHuW, et al.A review of electrolyte materials and compositions for electrochemical supercapacitors. Chem Soc Rev2015; 44: 7484–7539.
33.
YuZTetardLZhaiL, et al.Supercapacitor electrode materials: nanostructures from 0 to 3 dimensions. Energy Environ Sci2015; 8: 702–730.
34.
LiuGWangNQiF, et al.Novel Ni-Ge-P anodes for lithium-ion batteries with enhanced reversibility and reduced redox potential. Inorg Chem Front2022; 10: 699–711.
35.
RanFYangXShaoL. Recent progress in carbon-based nanoarchitectures for advanced supercapacitors. Adv Compos Hybrid Mater2018; 1: 32–55.
36.
KeXLiangYOuL, et al.Surface engineering of commercial Ni foams for stable Li metal anodes. Elsevier2019; 23: 547–555.
37.
MirghniAAMomoduDOyedotunKO, et al.Electrochemical analysis of Co3(PO4)2·4H2O/graphene foam composite for enhanced capacity and long cycle life hybrid asymmetric capacitors. Electrochim Acta2018; 283: 374–384.
38.
MahmoudBAMirghniAAOyedotunKO, et al.Synthesis of cobalt phosphate-graphene foam material via co-precipitation approach for a positive electrode of an asymmetric supercapacitors device. J Alloys Compd818. Epub ahead of print 25 March 2020. DOI: https://doi.org/10.1016/j.jallcom.2019.153332.
39.
MirghniAAOyedotunKOMahmoudBA, et al.Nickel-cobalt phosphate/graphene foam as enhanced electrode for hybrid supercapacitor. Compos Part B Eng2019; 174: 106953.
40.
WangYGLiHQXiaYY. Ordered whiskerlike polyaniline grown on the surface of mesoporous carbon and its electrochemical capacitance performance. Adv Mater2006; 18: 2619–2623.
41.
AqeelSMHuangZWaltonJ, et al.Polyvinylidene fluoride (PVDF)/polyacrylonitrile (PAN)/carbon nanotube nanocomposites for energy storage and conversion. Adv Compos Hybrid Mater2018; 1: 185–192.
42.
SharmaPKumarV.Study of electrode and electrolyte material of supercapacitor. In: Materials today: proceedings, pp.1573–1578.
43.
PeigneyALaurentCFlahautE, et al.Specific surface area of carbon nanotubes and bundles of carbon nanotubes. Carbon N Y2001; 39: 507–514.
44.
LiMLuoYJiaC, et al.Facile synthesis of bimetal nickel cobalt phosphate nanostructures for high-performance hybrid supercapacitors. J Alloys Compd893. Epub ahead of print 2022. DOI: https://doi.org/10.1016/j.jallcom.2021.162340.
45.
Abdul KarimMRNomanMKhanKI, et al.Solvothermal synthesis of flower-flakes like nano composites of Ni-Co metal organic frameworks and graphene nanoplatelets for energy storage applications. ECS J Solid State Sci Technol2022; 11: 011001.
46.
WangGJinZZhangW. A phosphatized NiCo LDH 1D dendritic electrode for high energy asymmetric supercapacitors. Dalt Trans2019; 48: 14853–14863.
47.
IqbalMZAlamSAfzalAM, et al.Binary composites of strontium oxide/polyaniline for high performance supercapattery devices. Solid State Ionics2020; 347: 115276.
48.
SosunovAVRajapakseMRudakovGA, et al.Pseudocapacitance of microporous carbon/polyaniline composites. Surf Eng Appl Electrochem2022; 58: 87–93.
49.
XiaCLengMTaoW, et al.Polyaniline/carbon nanotube core–shell hybrid and redox active electrolyte for high-performance flexible supercapacitor. J Mater Sci Mater Electron2019; 30: 4427–4436.
50.
WangHDaiH. Strongly coupled inorganic–nano-carbon hybrid materials for energy storage. Chem Soc Rev2013; 42: 3088–3113.
51.
WuHGaoYLiH. Controlled synthesis of nickel phosphate hexahedronal and flower-like architectures via a simple template-free hydrothermal route. CrystEngComm2010; 12: 3607–3611.
52.
RamoraswiNONdunguPG. Photo-catalytic properties of TiO2 supported on MWCNTs, SBA-15 and silica-coated MWCNTs nanocomposites. Nanoscale Res Lett10. Epub ahead of print 1 December 2015. DOI: https://doi.org/10.1186/s11671-015-1137-3.
53.
JiangLGaoL. Fabrication and characterization of carbon nanotube-titanium nitride composites with enhanced electrical and electrochemical properties. J Am Ceram Soc2006; 89: 156–161.
54.
ChenGSunarsoJZhuY, et al.Highly active carbon/α-MnO2 hybrid oxygen reduction reaction electrocatalysts. ChemElectroChem2016; 3: 1760–1767.
55.
Sydulu SinguBSrinivasanPPabbaS. Benzoyl peroxide oxidation route to nano form polyaniline salt containing dual dopants for pseudocapacitor. J Electrochem Soc2011; 159: A6–A13.
56.
TheerthagiriJThiagarajanKSenthilkumarB, et al.Synthesis of hierarchical cobalt phosphate nanoflakes and their enhanced electrochemical performances for supercapacitor applications. ChemistrySelect2017; 2: 201–210.
57.
ZhangFYuanCLuX, et al.Facile growth of mesoporous Co 3O 4 nanowire arrays on Ni foam for high performance electrochemical capacitors. J Power Sources2012; 203: 250–256.
58.
LiaoG. Green preparation of sulfonated polystyrene/polyaniline/silver composites with enhanced anticorrosive properties. Int J Chem2018; 10: 81.
59.
ParkOKJeevanandaTKimNH, et al.Effects of surface modification on the dispersion and electrical conductivity of carbon nanotube/polyaniline composites. Scr Mater2009; 60: 551–554.
60.
GopiDShinyjoyEKarthikaA, et al.Single walled carbon nanotubes reinforced mineralized hydroxyapatite composite coatings on titanium for improved biocompatible implant applications. RSC Adv2015; 5: 36766–36778.
61.
ArunachalamPShaddadMNAlamoudiAS, et al.Microwave-assisted synthesis of Co3(PO4)2 nanospheres for electrocatalytic oxidation of methanol in alkaline media. Catalysts7. Epub ahead of print 17 April 2017. DOI: https://doi.org/10.3390/catal7040119.
62.
SaadattalabVShakeriAGholamiH. Effect of CNTs and nano ZnO on physical and mechanical properties of polyaniline composites applicable in energy devices. Prog Nat Sci Mater Int2016; 26: 517–522.
63.
LiuFLuoSLiuD, et al.Facile processing of free-standing polyaniline/SWCNT film as an integrated electrode for flexible supercapacitor application. ACS Appl Mater Interfaces2017; 9: 33791–33801.
BalboniRDCMaronGKMasteghinMG, et al.An easy to assemble PDMS/CNTs/PANI flexible supercapacitor with high energy-to-power density. Nanoscale2022; 14: 2266–2276.
66.
ToprakciOJiLLinZ, et al.Fabrication and electrochemical characteristics of electrospun LiFePO 4/carbon composite fibers for lithium-ion batteries. J Power Sources2011; 196: 7692–7699.
67.
YanJHuangYWeiC, et al.Covalently bonded polyaniline/graphene composites as high-performance electromagnetic (EM) wave absorption materials. Compos Part A Appl Sci Manuf2017; 99: 121–128.
68.
NamMSPatilUParkB, et al.A binder free synthesis of 1D PANI and 2D MoS2 nanostructured hybrid composite electrodes by the electrophoretic deposition (EPD) method for supercapacitor application. RSC Adv2016; 6: 101592–101601.
69.
WuJ-BLinMLCongX, et al.Raman spectroscopy of graphene-based materials and its applications in related devices. Chem Soc Rev2018; 47: 1822–1873.
70.
KongL-BZhangJAnJJ, et al.MWNTs/PANI composite materials prepared by in-situ chemical oxidative polymerization for supercapacitor electrode. J Mater Sci2008; 43: 3664–3669. Springer.
71.
ZhangYMaMYangJ, et al.Shape-controlled synthesis of NiCo2S4 and their charge storage characteristics in supercapacitors. Nanoscale2014; 6: 9824–9830.
72.
ZhaoJPangHDengJ, et al.Mesoporous uniform ammonium nickel phosphate hydrate nanostructures as high performance electrode materials for supercapacitors. CrystEngComm2013; 15: 5950–5955.
73.
DuraisamyNArshidNKandiahK, et al.Development of asymmetric device using Co 3 (PO 4) 2 as a positive electrode for energy storage application. J Mater Sci Mater Electron. Epub ahead of print 2019. DOI: https://doi.org/10.1007/s10854-019-01057-x.
74.
LiJJLiuMCKongL-B, et al.Facile synthesis of Co3P2O8·8H2O for high-performance electrochemical energy storage. Mater Lett2015; 161: 404–407.
75.
Wulan SeptianiNLKanetiYVFathoniKB, et al.Self-assembly of nickel phosphate-based nanotubes into two-dimensional crumpled sheet-like architectures for high-performance asymmetric supercapacitors. Nano Energy67. Epub ahead of print 2020. DOI: https://doi.org/10.1016/j.nanoen.2019.104270.
76.
MirghniAAMaditoMJOyedotunKO, et al.A high energy density asymmetric supercapacitor utilizing a nickel phosphate/graphene foam composite as the cathode and carbonized iron cations adsorbed onto polyaniline as the anode. RSC Adv2018; 8: 11608–11621.
77.
ShehzadWKarimMRAIqbalMZ, et al.Sono-chemical assisted synthesis of carbon nanotubes-nickel phosphate nanocomposites with excellent energy density and cyclic stability for supercapattery applications. J Energy Storage54. Epub ahead of print 2022. DOI: https://doi.org/10.1016/j.est.2022.105231.
78.
TangYLiuZGuoW, et al.Honeycomb-like mesoporous cobalt nickel phosphate nanospheres as novel materials for high performance supercapacitor. Electrochim Acta2016; 190: 118–125.
ShehzadWAbdul KarimMR. Synthesis and electrochemical energy storage performance evaluation of PANI functionalized CNTs/Ni–Zn (PO4)2 nanocomposites. Appl Phys A2023; 129: 1–17.
81.
WangDWangYFuZ, et al.Cobalt-nickel phosphate composites for the all-phosphate asymmetric supercapacitor and oxygen evolution reaction. ACS Appl Mater Interfaces2021; 13: 34507–34517.
82.
AttiaSYMohamedSGBarakatYF, et al.Supercapacitor electrode materials: addressing challenges in mechanism and charge storage. Rev Inorg Chem2022; 42: 53–88.
83.
ShehzadWKarimMRA. Improved energy storage performance of sonochemically synthesized Ni-Co-Zn ternary metal phosphate composites by incorporating PANI functionalized CNTs. Diam Relat Mater2023; 137: 110050.
84.
ChoiWShinHCKimJM, et al.Modeling and applications of electrochemical impedance spectroscopy (Eis) for lithium-ion batteries. J Electrochem Sci Technol2020; 11: 1–13.
85.
LiJLuoSZhangB, et al.High-performance asymmetric Mn(OH)2//Fe2O3 supercapacitor achieved by enhancing and matching respective properties of cathode and anode materials. Nano Energy79. Epub ahead of print 2021. DOI: https://doi.org/10.1016/j.nanoen.2020.105410.
86.
ShaoYEl-KadyMFSunJ, et al.Design and mechanisms of asymmetric supercapacitors. Chem Rev2018; 118: 9233–9280.
