The Current Formation Processes in Lithium Power Sources with SiO2 – C Composite Cathode
Journal Title: Фізика і хімія твердого тіла - Year 2015, Vol 16, Issue 3
Abstract
The current formation process in lithium power source (LPS) with SiO2 –22% C composition cathode is explored in this work using galvanostatic cycling, cyclic voltammetry and impedance spectroscopy methods.It is set that specific capacity of LPS is 1757 mA•h/g at its discharge in the mode C/20. Further cycling of LPS is accompanied by a sharp decline in specific capacity (irreversible capacity after the first cycle exceeds 95 %) due to formation of solid electrolyte interface of LiF composition and LiхSiO2 compound, in which lithium is not oxidized to the ion state during charging of source. It is found that the insertion of lithium ions into cathodematerial to the value x = 1,8 results in reduction of their diffusion coefficient on 4 orders (DLi = 2,2•10 -14 ÷2,1•10 -18 сm2/s).
Authors and Affiliations
I. F. Myronyuk, V. I. Mandzyuk, V. M. Sachko
The New Molecular Dynamics Approach to Study Radiation Processes
A new modification of the classic method of molecular dynamics is proposed. Method allows clarifying the input of different intervals of the stationary energy spectrum of the incident particles to the final radiation eff...
Temperature Dependences of Thermodynamic Parameters of CdSe and CdTe Crystals
Based on the analysis of the crystal and electronic structure of CdX (X=Te, Se) crystals in the cubic phase cluster models have been built for calculation of the geometric and thermodynamic parameters. According to densi...
The Influence of High-Dispersed Barium Titanate, in Films With Addition of, and Based on Poly(Vinylidene) Fluoride), on Structure and Electrophysical Properties of Ones
With the aim of creation of effective electret materials, the composite films, based on poly(vinylidenefluoride) (PVF), in addition with segnetoelectric of barium titanate (BaTiO3) were obtained in concentrationrange of...
Problems of Selection of Lubricants for Ethylene High-Pressure Compressors. 4. Investigation of Antifriction Properties of Naphtene and Polyglycol Oils during High Loading of Solid Lubricant Pair
The antifriction properties of naphtene and polyglycol oils during little loading with lubrication of pair bronze-tungsten-carbide-alloy WK-6 (WK-ll) and graphelon-20-WK-6 (WK-11) and high loading with lubrication of pai...
Nanostructured Anodic Oxide Films of Niobium: Features of Electrochemical Formation, Functional Properties and Applications (Review)
The review summarizes data on the anodic behavior of niobium in aqueous solutions. Features of electrochemical formation nanostructured oxide coatings on niobium by anodic oxidation are systematized. The article deals wi...