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High-energy sodium-ion hybrid capacitors through nanograin-boundary-induced pseudocapacitance of Co_(3)O_(4) nanorods

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Journal of Energy Chemistry 2022年第6期31卷 338-346,I0009页

作者： Wenliang Feng Venkata Sai Avvaru Steven JHinder vinodkumar etacheri IMDEA Materials Institute C/Eric Kandel 2GetafeMadrid 28906Spain Universidad Politécnica de Madrid E.T.S.de Ingenieros de Caminos28040 MadridSpain Universidad Autónoma de Madrid C/Francisco Tomás y Valiente728049 MadridSpain Surface Analysis Laboratory Faculty of Engineering and Physical Sciences University of Surrey GuildfordSurrey GU27XHUnited Kingdom

Sodium-ion hybrid capacitors (SICs) have been proposed to bridge performance gaps between batteries and supercapacitors,and thus realize both high energy density and power density in a single ***,applications of SICs are severely restricted by their insufficient energy densities (<100Wh/kg) resulted from the kinetics imbalance between cathodes and ***,we report a nanograin-boundary-rich hierarchical Co_(3)O_(4) nanorod anode composed of~20 nm *** pseudocapacitance (up to 72%@1.0 mV/s) is achieved through nanograin-boundary-induced pseudocapacitive-type Na^(+) storage ***_(3)O_(4) nanorod anode delivers in this case highly reversible capacity (810 mAh/g@0.025 A/g),excellent rate capability (335 mAh/g@5.0 A/g),and improved cycle stability (100 cycles@1.0 A/g with negligible capacity degradation).The outstanding performance can be credited to the hierarchical morphology of Co_(3)O_(4) nanorods and the well-designed nanograinboundaries between nanocrystallites that avoid particle agglomeration,induce pseudocapacitive-type Na^(+) storage,and accommodate volume variation during sodiation-desodiation *** of the Co_(3)O_(4) nanorods not only generates defects for extra surficial Na^(+) storage but also increases the electronic conductivity for efficient charge separation and lowers energy barrier for Na^(+) *** of conventional reaction mechanism and pseudocapacitive-type Na^(+) storage enables high specific capacity,rapid Na^(+) diffusion,and improved structural stability of the Co_(3)O_(4) nanorod *** SIC integrating this highly pseudocapacitive anode and activated carbon cathode delivers exceptional energy density (175 Wh/kg@40 W/kg),power density (6632 W/kg@37 Wh/kg),cycle life (6000 cycles@1.0 A/g with a capacity retention of 81%),and coulombic efficiency (~100%).

关键词： Sodium-ion hybrid capacitor Cobalt oxide nanorod Nanograin-boundary Pseudocapacitance

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Effect of Mercuric Chloride and Cadmium Chloride on Gonadal Function and Its Regulation in SexuallyMature Common Carp Cyprinus carpio

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Biomedical and Environmental Sciences 1994年第1期7卷 13-24页

作者： DilipMUKHERJEE vinodkumar 等 EndocrionologyLaboratory DeartmentofZoologyUniversityofKalyaniKalyani－741235India EndocrionologyLa

Gonadal function in fish, CJprinus carpio was significantly affected by sublethal doses of mercuric chloride (HgCl2 ) and cadmium chloride (CdCl2 ) in chronic (45 days ) *** investigated were nonesterified (NE) and esterified (E) cholestcrol of ovary,liver and serum and ovarian 3β-Hydroxysteroid and 17β-Hydroxysteroid dehyrogenaseenzyme activity and serum and pituitary gonadotropin (GtH) levels. Both the pollutantswere able to reduce the hypothalamic extract (HE) or gonadotropin releasing hormone(GnRH) induced pituitary GtH release in vitro. Short term (96h) exposure of the fish tothe pollutants had no significant effect on the gonadal function. ln addition to thedeleterious effect of pollutants on the gonadal steroidogenesis and pituitary gonadotropin release, using [4-14C] cholesterol as a tracer it was found that for 45 days expeure, HgCl2'had an adverse effect on the transport of cholesterol from circulation to ovary.

关键词： Effect of Mercuric Chloride and Cadmium Chloride on Gonadal Function and Its Regulation in SexuallyMature Common Carp Cyprinus carpio

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APPROXIMATE CONTROLLABILITY RESULTS FOR INTEGRO-QUASILINEAR EVOLUTION EQUATIONS VIA TRAJECTORY REACHABLE SETS

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Acta Mathematica Scientia 2020年第2期40卷 412-424页

作者： A.vinodkumar C.Loganathan S.Vijay Department of Mathematics Amrita School of EngineeringAmrita Vishwa VidyapeethamCoimbatore-641112India Department of Mathematics Maharaja Arts and Science CollegeCoimbatore-641407Tamil NaduIndia

In this article,we study the approximate controllability results for an integroquasilinear evolution equation with random impulsive moments under sufficient *** results are obtained by the theory of C0 semigroup of bounded linear operators on evolution equations and using trajectory reachable ***,we generalize the results too with and without fixed type impulsive moments.

关键词： Integro-quasilinear control system random impulses approximate controllability

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Binding energy effects in the decay properties of charmonia

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Chinese Physics C 2010年第9期34卷 1411-1413页

作者： P.C.vinodkumar Bhavin Patel Department of Physics Sardar Patel University LDRP-Institute of Technology and Research

The di-gamma and di-gluon decay widths of P-wave cc mesons are computed in nonrelativistic phenomenological quark-antiquark potential of the type V （r） =-4 3 α s r＋ Ar ν with different choices of ν using spectroscopic *** numerically obtained radial solutions are employed to obtain the di-gamma and di-gluon decay *** computed decay widths are consistent with other model predictions as well as with the known experimental values in the range of potential index 0.7 ≤ ν ≤ 1.1.

关键词： charmonia potential models decay widths P -waves

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Decay rates of charmonia within a quark-antiquark confining potential

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Chinese Physics C 2016年第5期40卷 14-23页

作者： Smruti Patel P.C.vinodkumar Shashank Bhatnagar Department of Physics Sardar Patel University Department of Physics Addis Ababa University

In this work, we investigate the spectroscopy and decay rates of charmonia within the framework of the non-relativistic SchrSdinger equation by employing an approximate inter quark-antiquark potential. The spin hyperfine, spin-orbit and tensor components of the one gluon exchange interaction are employed to compute the spectroscopy of the excited S states and a few low-lying P and D waves. The resultant wave functions at zero inter- quark separation as well as some finite separations are employed to predict the di-gamma, di-leptonic and di-gluon decay rates of charmonia states using the conventional Van Royen-Weisskopf formula. The di-gamma and di-leptonic decay widths are also computed by incorporating the relativistic corrections of order v4 within the NRQCD formalism. We have observed that the NRQCD predictions with their matrix elements computed at finite radial separation yield results which are found to be in better agreement with experimentM values for both di-gamma and di-leptonic decays. The same scenario is seen in the case when di-gamma and di-leptonic decay widths are computed with the Van Royen- Weisskopf formula. It is also observed that the di-gluon decay width with the inclusion of binding energy effects are in better agreement with the experimental data available for 1S-2S and 1P. The di-gluon decay width of 3S and 2P waves waves are Mso predicted. Thus, the present study of decay rates clearly indicates the importance of binding energy effects.

关键词： potential models heavy quarkonia radiative decays non relativistic quark model

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STABILITY RESULTS OF RANDOM IMPULSIVE SEMILINEAR DIFFERENTIAL EQUATIONS

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Acta Mathematica Scientia 2014年第4期34卷 1055-1071页

作者： M.GOWRISANKAR P.MOHANKUMAR A.vinodkumar Department of Mathematics Annapoorana Engineering College Salem- 636308Tamil NaduIndia Department of Mathematics Arupadai Veedu Institute of Technology Chennai- 636104 Department of Mathematics PSG College of Technology Coimbatore- 641004Tamil NaduIndia

In this paper, we study the existence, uniqueness, continuous dependence, Ulam stabilities and exponential stability of random impulsive semilineax differential equations under sufficient condition. The results are obtained by using the contraction mapping principle. Finally an example is given to illustrate the applications of the abstract results.

关键词： semilinear differential equations random impulses stability, Hyers-Ulam stability Hyers-Ulam-Rassias stability exponential stability contraction principle

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Decay properties of D and D_s mesons in coulomb plus power potential (CPP_ν)

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Chinese Physics C 2010年第9期34卷 1497-1499页

作者： B.Patel P.C.vinodkumar LDRP- Institute of Technology and Research Department of Physics Sardar Patel University

The decay properties of the D and D s mesons are computed in a nonrelativistic phenomenological quark-antiquark potential of the type V （r） =-4 /3 α s /r＋ Ar ν with different choices of ν.Numerical method to solve the Schrdinger equation has been used to obtain the spectroscopy of qQ *** numerically obtained radial solutions are employed to obtain the decay constant and leptonic decay *** has been observed that predictions of the ground state masses and the decay widths are consistent with other model predictions as well as with the known experimental values.

关键词： open charm mesons potential models leptonic decay widths

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Electromagnetic transition properties of→Nγ in a hypercentral scheme

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Chinese Physics C 2012年第5期36卷 385-389页

作者： Kaushal Thakkar Ajay Majethiya P.C.vinodkumar Department of Applied Physics S.V.National Institute of Technology Department of Physics Sardar Patel University Kalol Institute of Technology and Research Centre

The electromagnetic transition properties of the decuplet to octet baryon （→ Nγ） is studied within the framework of a hypercentral quark *** confinement potential is assumed as a hypercentral coloumb plus linear *** transition magnetic moment and transition amplitude f M 1 for the → Nγ are in agreement with other theoretical *** present result of the radiative decay width is found to be in excellent agreement with the experimental values reported by the particle data group over other theoretical model predictions.

关键词： light flavour baryons transition magnetic moment radiative decay width

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Quark-diquark model description for double charm baryons

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Chinese Physics C 2010年第9期34卷 1399-1401页

作者： A.Majethiya B.Patel P.C.vinodkumar Department of Physics Sardar Patel University Kalol Institute of Technology and Research Center Behind Old Janpath Hotel LDRP-Institute of Technology and Research

We report here the mass spectrum and magnetic moments of ccq（q ∈ u,d,s） systems in the potential model framework by assuming the inter-quark potential as the colour coulomb plus power form with power index ν varying between 0.1 to *** the two charm quarks are considered for the diquark *** conventional one gluon exchange interaction has been employed to get the hyperfine and the fine structure between different *** have predicted many low-lying states whose experimental verification can exclusively support the quark-diquark structure of the baryons.

关键词： non-relativistic model quark-diquark model double charmed baryons

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EXISTENCE, UNIQUENESS AND STABILITY OF RANDOM IMPULSIVE FRACTIONAL DIFFERENTIAL EQUATIONS

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Acta Mathematica Scientia 2016年第2期36卷 428-442页

作者： A.vinodkumar K.Malar M.Gowrisankar P.Mohankumar Department of Mathematics Amrita School of EngineerringAmrita Vishwa Vidyapeetham University Department of Mathematics Erode Arts and Science College Department of Mathematics Annapoorana Engineering College Department of Mathematics A.C.T College of Engineering and Technology

In this article, we study the existence, uniqueness, stability through continuous dependence on initial conditions and Hyers-Ulam-Rassias stability results for random impulsive fractional differential systems by relax... 详细信息

关键词： Fractional differential systems random impulses stability Hyers-Ulam stability Hyers-Ulam-Rassias stability

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