ISSN 1608-4039 (Print)
ISSN 1680-9505 (Online)

химические источники тока

ВЛИЯНИЕ МЕХАНОАКТИВАЦИИ НА СИНТЕЗ ФОСФАТА ЛИТИЯ-ВАНАДИЯ ДЛЯ ЛИТИЙ-ИОННЫХ АККУМУЛЯТОРОВ

Одним из направлений по развитию литий-ионных аккумуляторов является разработка материала положительного электрода, от характеристик которого в значительной степени зависят конечные электрохимические параметры источника тока. В работе рассматривается влияние механоактивации и условий синтеза на структуру фосфата лития-ванадия. Показано, что механоактивация позволяет сократить время, уменьшить энергозатраты и увеличить выход ванадий-фосфат лития. Получено оптимальное соотношение активной массы/твердополимерного электролита/углерода для синтеза фосфата лития-ванадия.

Spectral Analysis of Nonharmonic and Polyharmonic Responses of an Electrochemical Object at Impedance Measurements

Possibilities for increasing efficiency of impedance spectral measurements are investigated. It is shown that for determination of linear electrochemical impedance a linearly changing input signal is preferable, and for the quantitative estimation of non-linearity of electrochemical impedance as an input signal it is expedient to use the cosine electric beats. The constructive diagrams of generators of such signals are offered.

Применение акустических методов для~диагностики химических~источников тока

DOI: https://doi.org/10.18500/1608-4039-2018-18-1-13-19

This article discusses the issue of increasing the reliability of evaluation of the depth of discharge of primary chemical sources of electric current by means of acoustic methods, which have never been used for this purpose, and integration of data of acoustic spectroscopy and impedance and noise spectroscopy.

Methodical Approaches to Diagnostics of Chemical Sources of Current Based on the Acoustical (Mechanical) Effects

DOI: https://doi.org/10.18500/1608-4039-2018-18-3-113-121

This article discusses methodical approaches to diagnostics of the state of electrochemical objects including evaluation of the depth of discharge of chemical current sources. Techniques of experiments and software package for data collection and processing are described. The study is focused on identifying the acoustic spectroscopy parameters most closely related to the depth of discharge of chemical current sources.

Methods of Preliminary Analysis of Noise Signal Measured on Electrochemical Systems

The study relates to the general problem of noise research in electrochemistry. The special issue of recognition of a weak signal against the background of equipment noise was considered . Chemical power sources were used as an object. The measurement results were analyzed using a standard model including the noise voltage and noise current of the equipment. The criterion of correctness of the model was compliance with the quadratic law of addition of components of a random noise signal.