Recent advancements in supercapacitor technology

Raza, Waseem; Ali, Faizan; Raza, Nadeem; Luo, Yiwei; Kim, Ki‐Hyun; Yang, Jianhua; Kumar, Sandeep; Mehmood, Andleeb; Kwon, Eilhann E.

doi:10.1016/j.nanoen.2018.08.013

Cited by 1,274 publications

(527 citation statements)

References 424 publications

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“…However, as mentioned above, there is no linear relationship between surface area and specific capacitance of carbon materials. Ba et al developedalow-cost carbon electrode material, [71] which exhibited excellent surfacea rea and high porosity with an organized pore structure of micro-, meso-and macropores, [104] after chemical activation by using fig waste as ab iomass precursor.T hese studies have shown that the electrical performance of ACs, including ACs prepared from different biomass waste materials, such as sugarcane bagasse, cellulose, sawdust,and corn grains, is highert han that of other carbon-based nanostructures, such as CNTsa nd graphene. [101] Different carbonaceous materials have been used as the negative electrode in ASCs, including porousc arbon, CNTs, and graphene.…”

Section: Carbon-based Materials Used As Electrode Materials For Ascsmentioning

confidence: 99%

“…Importantly,P SD andt uning the porosity of carbon materials have asignificant role in the capacitance. [104] It is also important to optimize the surfacef unctionality of ACs, whichc an affect the wettability of the electrode surface; this could also be ar eason for the additional increase in capacitance. Among them, AC stands out because of its large surfacea rea (> 1000 m 2 g À1 ), large pore volume (> 0.5 cm 2 g À1 ), and relativelyl ow cost.…”

Section: Carbon-based Materials Used As Electrode Materials For Ascsmentioning

confidence: 99%

“…Consequently,A Ci st he most widely used active materiali nE DLCs.A Ca lso has a broad pore size tunability,r anging from micro(nano)-(< 2nm) to macropores (> 50 nm;F igure 7). [104] Graphene is another fascinating allotrope of carbon with high thermal and electricalc onductivity,l arge surface area, and high mechanical and chemical stabilityt hat is worth mentioning. Usually,A Cc an be prepared from different organic and biomass precursors through carbonization,w hichi nvolves heatingi nt he presence of an inert gas followed by selectiveo xidation of the resulting carbon material by using CO 2 ,w ater vapor,o rK OH to increase the SSA and PSD.…”

Section: Carbon-based Materials Used As Electrode Materials For Ascsmentioning

confidence: 99%

See 2 more Smart Citations

Biomass‐Derived Carbon: A Value‐Added Journey Towards Constructing High‐Energy Supercapacitors in an Asymmetric Fashion

et al. 2019

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Section: Carbon-based Materials Used As Electrode Materials For Ascsmentioning

confidence: 99%

Section: Carbon-based Materials Used As Electrode Materials For Ascsmentioning

confidence: 99%

Section: Carbon-based Materials Used As Electrode Materials For Ascsmentioning

confidence: 99%

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Biomass‐Derived Carbon: A Value‐Added Journey Towards Constructing High‐Energy Supercapacitors in an Asymmetric Fashion

et al. 2019

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“…Recent developments in science and technology have ameliorated human living and have ushered the energy demand to the sky. The energy consumption by 2035 is apprehended to cross 18.3 billion tons of oil equivalent (BTOE), which would irrefutably induce adverse effects on the environment . The reduction of fossil fuels and peril to the environmental fettle has resulted in an indispensable need for alternate energy resources.…”

Section: Introductionmentioning

confidence: 99%

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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“…[6,7] The electrode material is an important factor to determine the performance of supercapacitors. [9] Various metal oxides, such as CoO, [10] NiO, [11] ZnO, [12,13] Co 3 O 4 , [14] Fe 2 O 3 , [15] and MnO 2 [16,17] have been used as electrode materials for supercapacitors. Compared with the other materials, metal oxides are favored by researchers because of their low cost and extremely high theoretical specific capacitance.…”

mentioning

confidence: 99%

Hybrid Supercapacitors Based on Interwoven CoO‐NiO‐ZnO Nanowires and Porous Graphene Hydrogel Electrodes with Safe Aqueous Electrolyte for High Supercapacitance

Sun

Wang

et al. 2019

Adv Elect Materials

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pollution. [6,7] The electrode material is an important factor to determine the performance of supercapacitors. [8] At present, electrode materials are roughly classified into four categories: metal oxides, carbon materials, conductive polymers, metal sulfides, and others. Compared with the other materials, metal oxides are favored by researchers because of their low cost and extremely high theoretical specific capacitance. [9] Various metal oxides, such as CoO, [10] NiO, [11] ZnO, [12,13] Co 3 O 4 , [14] Fe 2 O 3 , [15] and MnO 2 [16,17] have been used as electrode materials for supercapacitors. ZnO is one of the typical semiconductor materials. Due to its good electrochemical activity, large specific surface area, low cost, easy manufacturing, and high mechanical flexibility, it is considered to be a promising electrode material for supercapacitors. [12] However, the theoretical specific capacitance of ZnO limits its application in energy storage fields such as supercapacitor. [18] CoO is applied as electrode widely due to its ultra-high theoretical specific capacitance and high redox activity. [19,20] However, the high electrical resistance and poor electrical conductivity during charge and discharge restrict the cycle stability of CoO. As one of the materials currently used in supercapacitor electrode materials, NiO has the advantages of high theoretical specific capacitance and large specific surface area, but it is well known that its cycle stability and rate performance are poor. [21] Therefore, the composite materials obtained by combining several of them can also take advantage of their long complements and fully exert their synergistic effects, so that the comprehensive electrochemical performance is improved significantly so as to solve the problems of single metal oxide electrode. [22,23] For example, the surface/volume ratio of the nanostructures can increase the specific capacitance exponentially. The urchinlike CoO nanostructures were selected as the framework for depositing NiO nanosheets to construct a graded core/shell CoO@NiO hybrid nanostructure. [24] Unfortunately, although it has a good specific capacitance and energy density, its cycle stability is poor. ZnO/CoO composite in situ grown on Ni foam was produced, although the cycle stability is improved, the general specific capacitance is less satisfactory. [25] Compared with the single metal oxides, the energy density, power density, Metal oxides-based supercapacitors have attracted much attention due to their easy fabrication and ultra-high theoretical specific capacitance. Here, a novel ternary metal oxide (CoO-NiO-ZnO, CNZO) in situ grown on Ni foam (CNZO@Ni foam) is prepared by one-pot hydrothermal synthesis and a subsequent annealing method. Compared with the corresponding binary and single metal oxides of CoO-ZnO, NiO-ZnO, CoO-NiO, CoO, NiO, and ZnO, this ternary metal oxide shows an ultra-high specific capacitance (areal capacitance) of 2115.5 F g −1 (4.23 F cm −2 ) at a current density of 1 A g −1 (2 mA cm −2 ). Further, a hybrid sup...

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Recent advancements in supercapacitor technology

Cited by 1,274 publications

References 424 publications

Biomass‐Derived Carbon: A Value‐Added Journey Towards Constructing High‐Energy Supercapacitors in an Asymmetric Fashion

Biomass‐Derived Carbon: A Value‐Added Journey Towards Constructing High‐Energy Supercapacitors in an Asymmetric Fashion

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

Hybrid Supercapacitors Based on Interwoven CoO‐NiO‐ZnO Nanowires and Porous Graphene Hydrogel Electrodes with Safe Aqueous Electrolyte for High Supercapacitance

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