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| 1 | Carbon-coated manganese dioxide nanoparticles and their enhanced electrochemical properties for zinc-ion battery applications显示文摘In this study, we report the cost-effective and simple synthesis of carbon-coated α-MnO_2nanoparticles(α-MnO_2@C) for use as cathodes of aqueous zinc-ion batteries(ZIBs) for the first time. α-MnO_2@C was prepared via a gel formation, using maleic acid(C_4H_4O_4) as the carbon source, followed by annealing at low temperature of 270 °C. A uniform carbon network among the α-MnO_2 nanoparticles was observed by transmission electron microscopy. When tested in a zinc cell, the α-MnO_2@C exhibited a high initial discharge capacity of 272 m Ah/g under 66 m A/g current density compared to 213 m Ah/g, at the same current density, displayed by the pristine sample. Further, α-MnO_2@C demonstrated superior cycleability compared to the pristine samples. This study may pave the way for the utilizing carbon-coated MnO_2 electrodes for aqueous ZIB applications and thereby contribute to realizing high performance eco-friendly batteries. | Saiful Islam Muhammad Hilmy Alfaruqi Jinju Song Sungjin Kim Duong Tung Pham Jeonggeun Jo Seokhun Kim Vinod Mathew Joseph Paul Baboo Zhiliang Xiu Jaekook Kim | 2017 | Journal of Energy Chemistry2017，26，4： | 6 |
| 2 | Metal organic framework-combustion: A one-pot strategy to NiO nanoparticles with excellent anode properties for lithium ion batteries显示文摘NiO nanoparticles with average particles size of 30 nm are synthesized using a one-pot metal–organic framework-combustion(MOF-C) technique, for use as an anode material in rechargeable lithium ion batteries(LIBs). The structural and electronic properties of these nanoparticles are studied using various techniques, including powder X-ray diffraction(PXRD), transmission electron microscopy(TEM), scanning electron microscopy(SEM), X-ray photoelectron spectroscopy(XPS), and N_2 adsorption/desorption studies. The as-synthesized NiO nanoparticles sustained reversible stable capacities of 748 and 410 mAh/g at applied current densities of 500 and 1000 m A/g, respectively, after 100 cycles. Furthermore, the anode displays a notable rate capability, achieving a stable capacity of ~200 mAh/g at a high current density of10 A/g. These results indicate that the size of the NiO nanoparticles and their high surface area influence their electrochemical properties. Specifically, this combustion strategy is clearly favorable for improving the cyclability and rate capability of various metal oxides in rechargeable battery electrodes. | Vaiyapuri Soundharrajan Balaji Sambandam Jinju Song Sungjin Kim Jeonggeun Jo Pham Tung Duong Seokhun Kim Vinod Mathew Jaekook Kim | 2018 | Journal of Energy Chemistry2018，27，1： | 4 |
| 3 | Phase-pure Na3V2(PO4)2F3 embedded in carbon matrix through a facile polyol synthesis as a potential cathode for high performance sodium-ion batteries显示文摘In this study,a pseudo-layered Na super-ionic conductor of Na3V2(PO4)2F3 (NVPF)/C cathode for sodium-ion batteries is prepared successfully using a facile polyol refluxing process without any impurity phases.The X-ray diffraction and Rietveld refinement results confirm that NVPF possesses tetragonal NASICON-type lattice with a space group of P42/mnm.In this preparative method,polyol is utilized as a solvent as well as a carbon source.The presence of nanosized NVPF particles in the carbon network is confirmed by field-emission scanning electron microscopy (FE-SEM) and high-resolution transmission electron microscopy (HR-TEM).The existence of carbon is analyzed by Raman scattering and elemental analysis.When applied as a Na-storage material in a potential window of 2.0-4.3 V,the electrode exhibits two flat voltage plateaus at 3.7 and 4.2 V with an electrochemically active V^3+/V^4+ redox couple.In addition,Na3V2(PO4)2F3/C composite achieved a retention capacity of ~ 88% even after 1,500 cycles at 15 C.Moreover,at high current densities of 30 and 50 C,Na3V2(PO4)2F3/C cathode retains the specific discharge capacities of 108.4 and 105.9 mAh·g-1,respectively,revealing the structural stability of the material prepared through a facile polyol refluxing method. | Sohyun Park Jinju Song Seyeon Kim Balaji Sambandam Vinod Mathew Sungjin Kim Jeonggeun Jo Seokhun Kim Jaekook Kim | 2019 | Nano Research2019，12，4： | 4 |
| 4 | Studies on synthesis and pharmacological activities of 3,6-disubstituted-1,2,4-triazolo -1,3,4-thiadiazoles and their dihydro analogues 显示文摘 | Vinod Mathew J Keshavayya V P Vaidya | 2007 | European Journal of Medicinal Chemistry2007，42，： | 1 |
| 5 | Effects of praseodymium substitution on electrical properties of CaCu 3 Ti 4 O 12 ceramics显示文摘 | Alok Kumar Rai Jihyeon Gim Eui-chol Shin Hyun-Ho Seo Vinod Mathew K.D. Mandal Om Parkash Jong-Sook Lee Jaekook Kim | 2013 | Ceramics International2013，，： | 1 |
| 6 | 5-year outcomes of transcatheter aortic valve replacement compared with standard treatment for patients with inoperable aortic stenosis (PARTNER 1): a randomised controlled trial显示文摘 | Samir R Kapadia Martin B Leon Raj R Makkar E Murat Tuzcu Lars G Svensson Susheel Kodali John G Webb Michael J Mack Pamela S Douglas Vinod H Thourani Vasilis C Babaliaros Howard C Herrmann Wilson Y Szeto Augusto D Pichard Mathew R Williams Gregory P Fontan | 2015 | The Lancet . 2015 (9986)2015，，： | 1 |
| 7 | Prognostic significance of coronary sinus filling time in patients with angina and normal coronaries at one year follow up显示文摘 | P. Kadermuneer G.V. Vinod V. Haridasan G. Rajesh C.G. Sajeev Cicy Bastion D. Vinayakumar Dolly Mathew Biju George M.N. Krishnan | 2015 | Indian Heart Journal2015，，： | 1 |
| 8 | Optimal surgical management of severe ischemic mitral regurgitation: To repair or to replace?显示文摘 | Louis P. Perrault Alan J. Moskowitz Irving L. Kron Michael A. Acker Marissa A. Miller Keith A. Horvath Vinod H. Thourani Michael Argenziano David A. D’Alessandro Eugene H. Blackstone Claudia S. Moy Joseph P. Mathew Judy Hung Timothy J. Gardner Michael K. | 2012 | The Journal of Thoracic and Cardiovascular Surgery2012，，6： | 1 |
| 9 | Facile approach to synthesize CuO/reduced graphene oxide nanocomposite as anode materials for lithium-ion battery显示文摘 | Alok Kumar Rai Ly Tuan Anh Jihyeon Gim Vinod Mathew Jungwon Kang Baboo Joseph Paul Nitish Kumar Singh Jinju Song Jaekook Kim | 2012 | Journal of Power Sources2012，，： | 1 |
| 10 | Studies on synthesi8 and pharmacological activities of 3,6-disubstituted-1,2,4-triazolo-1,3,4-thiadiazoles and their dihydro analogues显示文摘 | Vinod Mathew Keshavayya J Vaidya V P | 2007 | European Journal of Medicinal Chemistry2007，42，： | 1 |
| 11 | Studies on synthesis and pharma-cological activities of 3,6-disubstituted-1,2,4-triazolo - 1,3,4-thiadiazoles and their dihydro analogues 显示文摘 | Vinod Mathew Keshavayya J Vaidya V P | 2007 | European Journal of Medicinal Chemistry2007，42，： | 1 |
| 12 | A Critical Comparison of Mildly Acidic versus Alkaline Zinc Batteries显示文摘Aqueous rechargeable batteries are cost-effective,easy to fabricate,and safe,deliver high energy output,and employ stable water-based electrolytes compared to organicbased lithium-ion batteries(LIBs).Aqueous Zn electrochemistry,specifically,has attracted researchers since the 1830s.Metallic Zn is a nearly ideal anode owing to its low cost(ca.2 USD kg^(−1)),existing supply chain,environmental benignity,relative safety,and high stability in water[−0.76 V vs standard hydrogen electrode(SHE)],as compared to Li.^(1−3) The high theoretical capacity(2e−@820 mAh g^(−1))and low polarizability(6×10^(−8)Ωm)further motivate Zn-based battery development,especially for stationary storage.2,4 Alkaline Zn batteries(AZBs)and neutral/mildly acidic Znion batteries(MZIBs)are proposed as rivals to the established Pb-acid and LIBs owing to their competitive theoretical energy densities(∼200−400 Wh L^(−1)).The efficiency of these inexpensive and safe battery technologies is dependent on the cathode type,Zn anode formulation,separator materials,and the electrolyte type(liquid,gel,solid state)and pH.While AZBs and MZIBs have commonalities,including Zn dendrite formation at high capacity utilization and inherent low voltage(Zn battery<3 V | Vinod Mathew Noah B.Schorr Balaji Sambandam Timothy N.Lambert Jaekook Kim | 2023 | Accounts of Materials Research2023，4，4： | 0 |
| 13 | Palaeobotanical and biomarker evidence for Early Permian(Artinskian) wildfire in the Rajmahal Basin, India显示文摘This study provides a combined analysis on the palynology, fossil charcoal and biomarkers of the subsurface coal deposits from a borehole RMB #2 drilled at the Dhulia Coal Block, Rajmahal Basin, India, in attempts to establish the chronology of sedimentation and to propose palaeobotanical as well as geochemical evidence for the occurrence of wildfires in these sediments. The palynological investigation suggests a Scheuringipollenites barakarensis palynoassemblage from the lower Barakar Formation, dated as Artinskian(Early Permian) in age. This assemblage reveals the dominance of Glossopteridales and sub-dominance of taxa belonging to Cordaitales and Coniferales.Fossil charcoal in sediments is usually recognized as a direct indicator for the occurrence of palaeo-wildfires. More data involving the anatomical features of fossil charcoal analyzed by Field Emission Scanning Electronic Microscope broaden our knowledge on Early Permian wildfires from the peninsula of India. The studied macroscopic charcoal fragments exhibit anatomical details such as homogenized cell walls, uniseriate simple and biseriate alternate pitting on tracheid walls and rays of varying heights pointing to a gymnospermous wood affinitity. The excellent preservation of charcoal fragments, shown by their large sizes and almost unabraded edges, suggests a parautochthonous origin. The embedded biomarker study performed for charcoal sediments and its characterization demonstrate the presence of n-alkanes, isoprenoids, terpenoids and aromatic compounds. A bimodal distribution pattern of n-alkanes with a Cmaxat n-C25 is identified. Diterpenoids and pentacyclic terpenoids are identified, indicating the input of an early conifer vegetation and bacterial activity, respectively. The identified polyaromatic hydrocarbon(PAH) compounds, together with the charcoal fragments, clearly suggest that repeated wildfire events occurred during the deposition of these Artinskian sediments in the Rajmahal Basin. | Srikanta Murthy Vinod Atmaram Mendhe Dieter Uhl Runcie Paul Mathews Vivek Kumar Mishra Saurabh Gautam | 2021 | Journal of Palaeogeography2021，10，1： | 0 |
| 14 | Organo-petrographic and geochemical characteristics of Gurha lignite deposits,Rajasthan,India:Insights into the palaeovegetation,palaeoenvironment and hydrocarbon source rock potential显示文摘The sedimentary sequence containing lignite deposits in Gurha quarry of the Bikaner-Nagaur Basin(Rajasthan)has been investigated.The samples from lignite and allied shale horizons were evaluated for petrographical,palynological,palynofacies and organic geochemical inferences,to depict the source flora and to reconstruct the palaeodepositional conditions prevailed during the sedimentation.An assessment for the hydrocarbon generation potential of these deposits has also been made.The results revealed the dominance of huminite macerals and phytoclasts organic matter(OM) indicating the existence of forested vegetation in the vicinity of the depositional site.A relatively high terrigenous/aquatic ratio(TAR) and the carbon preference index(CPI) are also suggesting the contribution of higher plants in the peat formation.However,the n-alkane distributions,maximizing at n-C17 and n-C29,showed inputs from the algal communities along with the higher plant derived organic matters.Recovered palynomorphs of the families Onagraceae,Meliaceae,Arecaceae,Rhizophoraceae,Rubiaceae,Ctenolophonaceae, etc.together with oleanene and ursane types of triterpenoids suggest the contribution from angiosperms source vegetation.Interestingly,the presence of Araucareaceae and Podocarpaceae pollen grains shows the existence of gymnosperms vegetation.Further,the presence of tetracyclic diterpanes;demethylated entbeyerane,sandaracopimarane,pimarane,and Kaurane type of compounds confirms the contribution of conifers.The variation in the values of the coefficient of non-equality(H:0.68%-7.56%),the standard deviation(8:0.04%-0.16%) and the coefficient of variability(V:16.10%-46.47%),also shows the heterogeneity in the source organic matter.The various petrographical indices,palynological entities,and geochemical parameters indicate that the peatforming vegetation was accumulated under a mixed environment and fluctuating hydrological settings.The interpretation of palynofacies data on APP(Amorphous organic matter-Phytoclast-Palynomorphs) diagram suggests that the accumulation of organic matter occurred in a dysoxic-suboxic condition in a proximal(to land)setting with the shift to an anoxic condition in distal setting towards the termination of sedimentation.The huminite(ulminite) reflectance(R_r) values(av.0.28%) showed a good relationship with average T_(max) value(414℃),suggesting the immaturity.The TOC content ranges of 13-59 wt.%,and HI values vary between 101 and 546 mg HC/g TOC in the studied samples.Collectively,the studied lignite and shale samples have the admixed kerogens(Type Ⅲ-Ⅱ) and exhibit the ability to generate the gaseous to oil hydrocarbons upon maturation. | Runcie Paul Mathews Bhagwan DSingh Vikram Partap Singh Alpana Singh Hukam Singh Mahesh Shivanna Suryendu Dutta Vinod A.Mendhe Rimpy Chetia | 2020 | Geoscience Frontiers2020，11，3： | 0 |
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