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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Frontiers in Advanced Functional Thin Films and Nanostructured Materials
Presentation Title Functionalized Graphene-polyoxometalate Nanodots Assembly as “Organic-inorganic” Hybrid Supercapacitors and Advanced Electrochemical Microscopy
Author(s) Sanju Gupta, Bryce Aberg, Sara B. Carrizosa
On-Site Speaker (Planned) Sanju Gupta
Abstract Scope Development of next-generation stable and high-performance electrodes from pseudocapacitive polyoxometalates (phosphomolybdate acid-H3PMo12O40; POM and phosphotungstic acid-H3PW12O40; POW) and supercapacitive reduced graphene oxide (rGO) synthesized hydrothermally is presented. The rGO and POM (or POW) nanodots interactions create emergent materials and "organic-inorganic" hybrid supercapacitors enabled by bridged(covalent/electrostatic) tailored interfaces and tunable physicochemical properties. The concomitant combination of double-layer capacitance from rGO and redox (faradaic) POM (and POW) led to an intrinsic increase in specific capacitance from 70 F.g−1 (rGO) to 320 F.g−1 (hybrids) and excellent stability (~94% retention). Scanning electrochemical microscopy is used to to gain insights into physico-chemical processes and to determine heterogeneous electron transfer rate highlighting roles of graphene edge plane sites in combination with mapping electrochemical (re)activity and electroactive site distribution. The findings are attributed to mesoporous network and topologically multiplexed ionic and conductive pathways provided by graphene with localized pockets of re-hybridized orbitals contributing toward rapid charge transfer.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A New Approach to Align CNTs in CNT Films
A Structural Analysis of the Epitaxial Ni/VO2 Heterostructure Integrated on Si(001)
An Investigation of the Relationship between Mechanical and Optical Properties of Transparent Metal Oxide Multilayers
Control of Nucleation of 3C-SiC Utilizing Screw Dislocations in 6H-SiC
Defects in Nanoscale Transitional Metal Di-chalcogenide Semiconducting Layers
Diamond Epitaxy for High Power and High Temperature Electronics
Discovery of Ferromagnetism and High-temperature Superconductivity in Q-carbon
Effect of Process Parameters on Phase Stability and Metal-insulator Transition of Vanadium Dioxide (VO2) Thin Films by Pulsed Laser Deposition (PLD)
Engineering Elastic Strain Gradients to Tune the Electrical Properties of Semiconductors for Thermoelectric Applications
Epitaxial Growth of Advanced Ceramic and Metal Films
Functionalization of Transparent Oxide Thin Films Using Silicon Doped Nanoparticles
Functionalized Graphene-polyoxometalate Nanodots Assembly as “Organic-inorganic” Hybrid Supercapacitors and Advanced Electrochemical Microscopy
Graphene Film Nano Geometry Control for Advanced Functional Properties
High-temperature Carbon-based Superconductors: B-doped Q-carbon
Hydrogen Plasma Annealing of E-Beam Evaporated SiO2 Tunnel Barriers
Kinetic Modeling of the Structural Transition in VO2 Thin Films
M-13: Anisotropic Magnetic Properties in BiFeO3/SrRuO3 and La0.7Ca0.3MnO3/SrRuO3 Heterostructures
M-14: Characterizing Nitrogen-vacancy (NV) Centers in Diamond Nanostructure Formed by Pulsed Laser Annealing Technique at Room Temperature and Ambient Pressure
M-15: How Good those are Mechanically Exfoliated MoS2 Mono Layered Devices at the Atomic Level?
M-16: Magnetic Anisotropy in Ni/VO2 Heterostructures
M-17: Nitrogen Vacancy Induced Room-temperature Ferromagnetism in TiN Epitaxial Thin Films via Ultrafast Laser Melting
M-18: Q-carbon Tribological Coatings on WC and Tool Steel
M-19: Synthesis and Mechanical Behavior of a Freestanding, Nanocrystalline NiTi Film under Cyclic Tensile Deformation
Materials Science in Two Dimensions
Nanostructure Synthesis by Pulsed Laser Melting
Novel Synthesis and Characterization of Carbon-doped Cubic Boron Nitride (c-BN) by Pulsed Laser Annealing Technique
Oxide Epitaxy with Large Mismatch: Bronze-phase VO2 on SrTiO3
Physiochemical and Antioxidant Properites of CNPs Modulated by Anions of the Precursor
Point Defect Energetics at Oxide Heterointerfaces
Processing and Properties of Nanomaterials in the C-B-N System
Stabilization of Nanocrystalline Grain Size at Elevated Temperatures: Theory and Experiment
Structures and Mechanical Behavior of Metal-metal Nitride Nanolayered Films
Superhard Q-carbon Nanostructures Formed via Nanosecond Laser Melting and Ultrafast Quenching
Thin Film and Coatings for Biomaterials Applications
Unraveling Self-Assembly Dynamics to Direct Higher Order
Unravelling Defects in Hybrid Perovskite Solar Cell Structures

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