Open AccessOn determination of the mechanism of the processes proceeding at syntesis of electrode material LiFePO4
Author(s) -
Aleksei Vladimirovich Churikov,
AUTHOR_ID,
V. V. Volynskii,
I. M. Gamayunova,
A. L. L’vov,
В. А. Решетов,
AUTHOR_ID,
AUTHOR_ID,
AUTHOR_ID,
AUTHOR_ID
Publication year - 2012
Publication title -
èlektrohimičeskaâ ènergetika
Language(s) - English
Resource type - Journals
eISSN - 1680-9505
pISSN - 1608-4039
DOI - 10.18500/1608-4039-2012-12-1-8-13
Subject(s) - lithium iron phosphate , electrochemistry , materials science , lithium (medication) , pyrolysis , intercalation (chemistry) , chemical engineering , carbon black , carbon fibers , conductivity , extraction (chemistry) , inorganic chemistry , electrode , composite number , chemistry , composite material , organic chemistry , medicine , natural rubber , engineering , endocrinology
The methods for the synthesis of lithium iron phosphate LiFePO4 with olivine structure have been developed. New materials based on lithium iron phosphate, including doped with metals, the «LiFePO4 + carbon» composites obtained by pyrolysis of organic compounds have been synthesized. Crystallographic characterization of the synthesized materials was carried out; their electrochemical characteristics of the extraction and intercalation of lithium have been identified. A correlation between the crystallographic and electrochemical characteristics of the materials was found. It was confirmed that an effective way to improve the electrical conductivity of LiFePO4 is to create a carbon shell of the products of pyrolysis of organic compounds on the material’s particles surface. A correlation of electrical conductivity and temperature of synthesis of the material was determined. The sequence of chemical interaction between precursors for the synthesis of LiFePO4 is defined; the mechanism of solid-phase interaction is described.