Synthesis and electrochemical performance of Li2Mg0.15Mn0.4Co0.45SiO4/C cathode material for lithium ion batteries

Autor:	Yang-xi Peng, Jun Guo, Jin Wen, Chuan-yue Hu, Si-jun Li
Rok vydání:	2012
Předmět:	Materials science Lithium vanadium phosphate battery Metals and Alloys General Engineering Analytical chemistry chemistry.chemical_element Electrochemistry Lithium-ion battery Ion chemistry Lithium Orthorhombic crystal system Current density Solid solution
Zdroj:	Journal of Central South University. 19:1791-1795
ISSN:	2227-5223 2095-2899
DOI:	10.1007/s11771-012-1209-9
Popis:	The synthesis, structure and performance of Li2Mg0.15Mn0.4Co0.45SiO4/C cathode material were studied. The Li2Mg0.15Mn0.4Co0.45SiO4/C solid solution with orthorhombic unit cell (space group Pmn21) was synthesized successfully by combination of wet process and solid-state reaction at high temperature, and its electrochemical performance was investigated primarily. Li2Mg0.15Mn0.4Co0.45SiO4/C composite materials deliver a charge capacity of 302 mA·h/g and a discharge capacity of 171 mA·h/g in the first cycle. The discharge capacity is stabilized at about 100 mA·h/g after 10 cycles at a current density of 10 mA/g in the voltage of 1.5–4.8 V vs Li/Li+. The results show that Mg-substitution for the Co ions in Li2Mn0.4Co0.6SiO4 improves the stabilization of initial structure and the electrochemical performance.
Databáze:	OpenAIRE
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