01831nas a2200265 4500008004100000022001400041245012300055210006900178260000900247300001100256490000800267520095300275653001501228653002201243653002601265653001901291653002201310100001901332700001901351700001801370700001601388700001801404700001801422856012501440 2021 eng d a0169-433200aBimetallic ZnFe2O4 nanosheets prepared via electrodeposition as binder-free high-performance supercapacitor electrodes0 aBimetallic ZnFe2O4 nanosheets prepared via electrodeposition as  cSEP  a1499510 v5593 a

Binder-free bimetallic ZnFe2O4 nanosheets were fabricated using one-step electrodeposition, which facilitated excellent electrical contact between the ZnFe2O4 nanosheets and the nickel substrate. The resultant numerous ZnFe2O4 nanosheets with their cubic spinel structures promote interfacial activity to enhance the electrochemical and Faradaic redox reactions. The metallic Zn and Fe from the cubic spinel structure of ZnFe2O4 attract electrolytic ions and increase the energy-storage capability, thus yielding a specific capacitance of 1093 F.g(-1) at a current rate of 1 A.g(-1). Different samples were prepared by varying the amount of metal salts in the electrodeposition solution while maintaining a constant ZnNt:FeSO4 concentration ratio of 1:2 for all cases. The optimal electrode composition, which yielded an energy density of 54 Wh.kg(-1) and a capacitance retention of 93.5% at N = 5000 charge-discharge cycles, was identified.

10aBimetallic10aElectrodeposition10aEnergy storage device10asupercapacitor10aZnFe2O4 nanosheet1 aJoshi, Bhavana1 aSamuel, Edmund1 aPark, Chanwoo1 aKim, Yongil1 aLee, Hae-Seok1 aYoon, Sam, S. uhttps://library.ncl.res.in/content/bimetallic-znfe2o4-nanosheets-prepared-electrodeposition-binder-free-high-performance02180nas a2200277 4500008004100000022001400041245010800055210006900163260000800232300001600240490000700256520127800263653002001541653002701561653002401588653001901612653001201631100001901643700001901662700001601681700001601697700002301713700001901736700001801755856012901773 2022 eng d a0363-907X00aElectrospun zinc-manganese bimetallic oxide carbon nanofibers as freestanding supercapacitor electrodes0 aElectrospun zincmanganese bimetallic oxide carbon nanofibers as  cDEC a22100-221120 v463 a

Flexible, lightweight, and freestanding zinc-manganese oxide carbon nanofibers are promising materials for the fabrication of portable electronic devices. Composite nanofibers were synthesized using terephthalic acid and sodium dodecyl sulfate. Terephthalic acid improves the flexibility of the composite fibers and facilitates the diffusion of electrolytic ions. Meanwhile, sodium dodecyl sulfate aids to elevate the metal (zinc) oxide particles to the surface of the nanofibers during annealing. The texturing of the carbon nanofiber surface with ZnO enhances the electrochemical activity of the composite fibers. Parametric studies were conducted by varying the weight ratio of zinc and manganese acetates from zero to unity. The optimal case with a ratio of 0.75 produces specific capacitances of 1080 and 817 F center dot g(-1) at current densities of 1 and 10 A center dot g(-1), respectively, with a wide potential window of 1.6 V, indicating outstanding energy storage capabilities. The capacitance retention was 92% after 10 000 galvanostatic charge-discharge cycles. The bending angle test confirmed the mechanical durability of the freestanding carbon nanofiber electrodes, and the corresponding change in the cyclic voltammetry curve was negligible.

10aelectrospinning10afreestanding electrode10ahigh-energy-density10asupercapacitor10aZnMn2O41 aJoshi, Bhavana1 aSamuel, Edmund1 aKim, Yongil1 aKim, Taegun1 aEl-Newehy, Mohamed1 aAldalbahi, Ali1 aYoon, Sam, S. uhttps://library.ncl.res.in/content/electrospun-zinc-manganese-bimetallic-oxide-carbon-nanofibers-freestanding-supercapacitor02650nas a2200301 4500008004100000022001400041245011700055210006900172260000900241300001100250490000800261520170500269653002201974653001301996653001502009653001502024653002002039653001302059653001102072653001902083100001902102700001902121700001702140700002502157700002202182700001802204856012602222 2022 eng d a0010-854500aReview of recent progress in electrospinning-derived freestanding and binder-free electrodes for supercapacitors0 aReview of recent progress in electrospinningderived freestanding cJUN  a2144660 v4603 a

The versatile electrospinning technique is scalable and suitable to fabricate highly conducting freestanding carbon nanofiber composite electrodes for energy storage devices. Freestanding/flexible electrodes hold enormous potential for use in wearable electronic devices. Carbon-yielding polymers and the optimal use of sacrificial polymers, metal oxides, and sulfides retain the flexibility and enhance the surface area and pseudocapacitance of electrodes. Both as-prepared electrospun fibers and carbonized nanofibers are compatible with surface decoration via various chemical and electrochemical routes. Metal oxides/sulfides with various morphologies, such as nanocones and nanosheets, can be grown on the carbon nanofibers or on the as-prepared electrospun fibers using chemical synthesis methods such as electro-deposition, hydrothermal processes, and chemical impregnation to enhance the pseudocapacitance of the electrodes. Similarly, the deposition of metal organic frameworks on as-prepared electrospun fibers embellishes these fibers with nanostructures of specific morphologies such as dodecahedral and spindle-shaped structures. Under optimal conditions, these morphologies do not hamper the flexibility of the fibers, and binders are not required to retain them or maintain the electrode integrity. The engineering of electrodes with various morphologies and process parameters is presented systematically. Electrospinning-derived electrodes that have demonstrated significant electrochemical performance are highlighted and critically analyzed, and the energy storage mechanisms of these supercapacitors are described in detail. (C) 2022 Elsevier B.V. All rights reserved.

10aCarbon nanofibers10aCo-axial10acomposites10acore-shell10aelectrospinning10aFlexible10aPorous10asupercapacitor1 aJoshi, Bhavana1 aSamuel, Edmund1 aKim, Yong-il1 aYarin, Alexander, L.1 aSwihart, Mark, T.1 aYoon, Sam, S. uhttps://library.ncl.res.in/content/review-recent-progress-electrospinning-derived-freestanding-and-binder-free-electrodes