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Papers by Greg Less

Research paper thumbnail of Patent 8697273 Separator for Electrochemical Cell and Method for its Manufacture

Research paper thumbnail of Patent 8697290 Laminated Battery Cell Comprising Multilayer Compoiste Separator and Methods for Creating the Same

Research paper thumbnail of In situ AFM studies on lithium (de)intercalation-induced morphology changes in LixCoO2 micro-machined thin film electrodes

Research paper thumbnail of Micro-Scale Modeling of Li-Ion Batteries: Parameterization and Validation

Research paper thumbnail of A review of conduction phenomena in Li-ion batteries

Journal of Power Sources, 2010

Conduction has been one of the main barriers to further improvements in Li-ion batteries and is e... more Conduction has been one of the main barriers to further improvements in Li-ion batteries and is expected to remain so for the foreseeable future. In an effort to gain a better understanding of the conduction phenomena in Li-ion batteries and enable breakthrough technologies, a comprehensive survey of conduction phenomena in all components of a Li-ion cell incorporating theoretical, experimental, and simulation studies, is presented here. Included are a survey of the fundamentals of electrical and ionic conduction theories; a survey of the critical results, issues and challenges with respect to ionic and electronic conduction in the cathode, anode and electrolyte; a review of the relationship between electrical and ionic conduction for three cathode materials: LiCoO2, LiMn2O4, LiFePO4; a discussion of phase change in graphitic anodes and how it relates to diffusivity and conductivity; and the key conduction issues with organic liquid, solid-state and ionic liquid electrolytes.

Research paper thumbnail of Vanadium Complex of 2-(2‘-Pyridyl)-4,5-dicyanoimidazole Showing Spermicidal and Cytotoxic Properties

Inorganic Chemistry, 2006

Two complexes having the formulas VO(DCIPy)2(H2O).1.5H2O and VO(DCIPy)2(H2O).2MeOH have been synt... more Two complexes having the formulas VO(DCIPy)2(H2O).1.5H2O and VO(DCIPy)2(H2O).2MeOH have been synthesized and characterized (DCIPy = 2-(2'-pyridyl)-4,5-dicyanoimidazolato). The methanol solvated species has been studied by X-ray diffraction, and single crystals form in the space group P2(1)/n. The hydrated species was studied by electron paramagnetic resonance spectroscopy in both the solid state and in a frozen solution, and the values of A( parallel) examined using the additivity relationship. The hydrated species was shown to exhibit both spermicidal and cytoxic properties.

Research paper thumbnail of 4-Cyanoimidazolate:  A New Pseudo-Cyanide?

Inorganic Chemistry, 2004

Because of its exobidentate nature, pK(a), and electronic properties, 4-cyanoimidazole has been e... more Because of its exobidentate nature, pK(a), and electronic properties, 4-cyanoimidazole has been examined as a ligand and as a pseudo-cyanide. The ligand reacts readily as an anion with both cobalt and nickel ions in solution to form coordination polymers. The magnetic susceptibility and thermal stability of these materials are reported. 4-Cyanoimidazolate forms a hexakis complex with nickel, to form the first observed hexakis imidazolate nickelate complex.

Research paper thumbnail of Patent 8697273 Separator for Electrochemical Cell and Method for its Manufacture

Research paper thumbnail of Patent 8697290 Laminated Battery Cell Comprising Multilayer Compoiste Separator and Methods for Creating the Same

Research paper thumbnail of In situ AFM studies on lithium (de)intercalation-induced morphology changes in LixCoO2 micro-machined thin film electrodes

Research paper thumbnail of Micro-Scale Modeling of Li-Ion Batteries: Parameterization and Validation

Research paper thumbnail of A review of conduction phenomena in Li-ion batteries

Journal of Power Sources, 2010

Conduction has been one of the main barriers to further improvements in Li-ion batteries and is e... more Conduction has been one of the main barriers to further improvements in Li-ion batteries and is expected to remain so for the foreseeable future. In an effort to gain a better understanding of the conduction phenomena in Li-ion batteries and enable breakthrough technologies, a comprehensive survey of conduction phenomena in all components of a Li-ion cell incorporating theoretical, experimental, and simulation studies, is presented here. Included are a survey of the fundamentals of electrical and ionic conduction theories; a survey of the critical results, issues and challenges with respect to ionic and electronic conduction in the cathode, anode and electrolyte; a review of the relationship between electrical and ionic conduction for three cathode materials: LiCoO2, LiMn2O4, LiFePO4; a discussion of phase change in graphitic anodes and how it relates to diffusivity and conductivity; and the key conduction issues with organic liquid, solid-state and ionic liquid electrolytes.

Research paper thumbnail of Vanadium Complex of 2-(2‘-Pyridyl)-4,5-dicyanoimidazole Showing Spermicidal and Cytotoxic Properties

Inorganic Chemistry, 2006

Two complexes having the formulas VO(DCIPy)2(H2O).1.5H2O and VO(DCIPy)2(H2O).2MeOH have been synt... more Two complexes having the formulas VO(DCIPy)2(H2O).1.5H2O and VO(DCIPy)2(H2O).2MeOH have been synthesized and characterized (DCIPy = 2-(2'-pyridyl)-4,5-dicyanoimidazolato). The methanol solvated species has been studied by X-ray diffraction, and single crystals form in the space group P2(1)/n. The hydrated species was studied by electron paramagnetic resonance spectroscopy in both the solid state and in a frozen solution, and the values of A( parallel) examined using the additivity relationship. The hydrated species was shown to exhibit both spermicidal and cytoxic properties.

Research paper thumbnail of 4-Cyanoimidazolate:  A New Pseudo-Cyanide?

Inorganic Chemistry, 2004

Because of its exobidentate nature, pK(a), and electronic properties, 4-cyanoimidazole has been e... more Because of its exobidentate nature, pK(a), and electronic properties, 4-cyanoimidazole has been examined as a ligand and as a pseudo-cyanide. The ligand reacts readily as an anion with both cobalt and nickel ions in solution to form coordination polymers. The magnetic susceptibility and thermal stability of these materials are reported. 4-Cyanoimidazolate forms a hexakis complex with nickel, to form the first observed hexakis imidazolate nickelate complex.

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