个人简介

M.S., 1996, Moscow State Univ. (Russia) Ph.D., 1999, Moscow State Univ. (Russia) Postdoctoral Fellow, 2000-2001, MPI Stuttgart (Germany) Alexander von Humboldt Foundation Postdoctoral Fellow, 2001-2003, MPI Stuttgart (Germany) Research Associate, 2004-09, Rutgers, The State Univ. of New Jersey.

研究领域

Inorganic Materials Theoretical and Computational

(Research Description PDF - 1230 kb) Solid state chemistry of novel energy-related materials, such as new battery, thermoelectric, and strongly correlated electron materials, is the focus of our research. The Design of Advanced Materials assumes an understanding of the correlation between chemical composition, crystal structure, crystallite size and shape, and physical/chemical properties. Although it is not possible yet to reliably predict materials’ properties, there are often crystal structure motives, special features in band structures or in atom spin states which are favorable for a property to emerge. Therefore, the ability to design rationally new compounds is crucial for discovery of materials with advanced properties. New synthetic methodology developed in our group enables for the preparation of novel materials in a predictable way. Battery Materials. The development of cheaper and safer batteries with higher energy densities for vehicular and large scale energy storage applications is primarily hindered by the properties of the cathode materials. In order to drastically increase battery energy densities we perform the systematic investigation of the possibility of two Li per one transitional metal atom cycling in intercalation chemistry based cathode materials. For the first time electrochemical cycling of the Fe3+/Fe4+ redox couple at 4.5 V was demonstrated for a novel tunnel LiFeO2 polymorph. Strongly Correlated-electrons Materials. In a special class of transitional metal compounds electron–electron interaction results in a variety of physical properties important from fundamental and technological points of view: high temperature superconductivity, multiferroic, thermoelectric, heavy fermion metallic behavior, and colossal magnetoresistance. Investigation of structure-property relationships for these compounds provides deep insights into correlated-electron behavior, approximate to possibility of design of materials with desired properties. Density Functional Theory is used to calculate the electronic structure of complex systems. In our group theoretical calculations are used to calculate electronic band structures, Fermi surfaces and total energies of magnetically ordered states. This allows deeper understanding of measured properties. Theoretical properties predictions are also used to identify phases of interest for further synthesis. Students are trained in the areas of inorganic synthesis, electrochemistry, crystallography, magnetism, and various characterization techniques. Expertise in synthetic methods and characterization techniques will allow the students to become versatile scientists, well equipped with the technical prerequisites necessary for future independent careers.

近期论文

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Synthesis and electrochemical properties of novel LiFeTiO4 and Li2FeTiO4 polymorphs with the CaFe2O4-type structures S.R. Bruno, C.K. Blakely, J.B. Clapham, J.D. Davis, W. Bi, E.E. Alp, V.V. Poltavets Journal of Power Sources 273 (2015) 396-403 Structural and magnetic behavior of the cubic oxyfluoride SrFeO2F studied by neutron diffraction C.M. Thompson, C.K. Blakely, R. Flacau, J.E. Greedan, V.V. Poltavets Journal of Solid State Chemistry, 219 (2014), 173-179 Multistep soft chemistry method for valence reduction in transition metal oxides with triangular (CdI2-type) layers C.K. Blakely, S.R. Bruno, V.V. Poltavets Chemical Communications, 50 (2014), 2797-2800 Scalable synthesis of delafossite CuAlO2 nanoparticles for p-type dye-sensitized solar cell applications J. Ahmed, C.K. Blakely, J. Prakash, S.R. Bruno, M. Yu, Y. Wu, V.V. Poltavets Journal of Alloys and Compounds, 591 (2014), p.275-279 Multistep synthesis of the SrFeO2F perovskite oxyfluoride via the SrFeO2 infinite-layer intermediate C.K. Blakely, J.D. Davis, S.R. Bruno, S.K. Kraemer, M. Zhu, X. Ke, W. Bi, E.E. Alp, V.V. Poltavets Journal of Fluorine Chemistry, 159 (2014), p.8-14. NMR evidence for spin fluctuations in the bilayer nickelate La3Ni2O6 N. apRoberts-Warren, J. Crocker, A. P. Dioguardi, K. R. Shirer, V. V. Poltavets, M. Greenblatt, P. Klavins, N. J. Curro Phys. Rev. B, 88 (2013), 075124 Low temperature high-pressure synthesis of LnNiO3 (Ln = Eu, Gd) in molten salts J. Prakash, C. K. Blakely, V. V Poltavets Solid State Sciences, 17 (2013), 72-75. Effects of ball milling and thermal annealing on size and strain of ASnO3 (A = Ba, Sr) ceramics C. K Blakely; S. R Bruno; Z. J. Baum; V. V Poltavets Solid State Sciences, 15 (2013), 110-114. Synthesis and Electrochemical Properties of Novel Co2+/Co3+ Layered Ordered Rock-Salt Structure Type Li0.75Ca0.25CoO2 C. K. Blakely, S. R. Bruno, J. D. Davis, V. V. Poltavets ECS Transactions, 45 (2013), p. 3-10. LiFeTiO4 with Tunnel Structure as a Model System for Multiple Li Cycling as Cathode Material S. R. Bruno, C. K. Blakely, C. Tenbusch, V. V. Poltavets ECS Transactions, 45 (2013), p. 23-28. Synthesis of Mixed-Valent α- and β- NaFe2O3 Polymorphs under Controlled Low Oxygen Pressure S.R. Bruno, C.K. Blakely, V.V. Poltavets Journal of Solid State Chemistry, 192 (2012), 68-74. Synthesis of MSnO3 (M = Ba, Sr) Nanoparticles by Reverse Micelle Method and Particle Size Distribution Analysis by Whole Powder Pattern Modelling J. Ahmed, S.R. Bruno, C.K. Blakely, V.V. Poltavets Materials Research Bulletin, 47 (2012), 2282-2287. Novel LiFeTiO4 Polymorph with a Tunnel Structure: Synthesis, Structural and Electrochemical Characterization S. R. Bruno, C. K. Blakely, V. V. Poltavets ECS Transactions, 41 (2012), 29-34. Low Temperature Solvothermal Approach to the Synthesis of La4Ni3O8 by Topotactic Oxygen Deintercalation Colin K. Blakely, Shaun R. Bruno, Viktor V. Poltavets Inorganic Chemistry, 50 (2011), 6696. Critical spin dynamics in the antiferromagnet La4Ni3O8 from 139La nuclear magnetic resonance N. ApRoberts-Warren, A.P. Dioguardi, V.V. Poltavets, M. Greenblatt, P. Klavins, N.J. Curro Phys. Rev. B, 83 (2011), 014402. Bulk Magnetic Order in a Two-Dimensional Ni1+/Ni2+ (d9/d8) Nickelate, Isoelectronic with Superconducting Cuprates V.V. Poltavets, K.A. Lokshin, A.H. Nevidomskyy, M.Croft, T.A. Tyson, J.Hadermann, G. Van Tendeloo, T.Egami, G. Kotliar, N. ApRoberts-Warren, A.P. Dioguardi, N.J. Curro, M. Greenblatt1. Physical Review Letters, 104 (2010), 206403. Articles published before joining MSU Electronic Properties, Band Structure, and Fermi Surface Instabilities of Ni1+/Ni2+ Nickelate La3Ni2O6, Isoelectronic with Superconducting Cuprates V.V. Poltavets, G.H. Fecher, C. Felser, M. Greenblatt. Physical Review Letters, 102 (2009), 046405. Sodium ion and cobalt charge ordering in Na0.8CoO2 P. Foury-Leylekian, V.V. Poltavets, N. Jaouen, J.-P. Rueff, J.E. Lorenzo, P. Senzier, C. Pasquier, C. Mazzoli, M. Greenblatt. Physical Review B, 79 (2009), 115101. Synthesis, Structure and Magnetic Properties of A2MnB'O6 (A = Ca, Sr; B' = Sb, Ta) Double Perovskites T.K. Mandal, V.V. Poltavets, M. Croft, M. Greenblatt. Journal of Solid State Chemistry, 181 (2008), p. 2325-2331. Synthesis, Structure and Magnetic Properties of SrLaMnSbO6: A New B-site Ordered Double Perovskite T.K. Mandal, A.M. Abakumov, M.V. Lobanov, M. Croft, V.V. Poltavets, M. Greenblatt. Chemistry of Materials, 20 (2008), p.4653.