Combustion synthesis and electrochemical performance of Li2FeSiO4/C cathode material for lithium-ion batteries
2012 (English)In: Journal of Power Sources, ISSN 0378-7753, Vol. 205, 456-462 p.Article in journal (Refereed) Published
A novel preparation technique was developed for synthesizing Li2FeSiO4/C nanoparticles through combustion of reaction mixtures containing silicon source. Li and Fe sources that operate as oxidizers and sucrose that act as a fuel. A systematic investigation of the synthesis parameters, such as the effect of the fuel content, on purity, morphology and electrochemical properties of the samples was performed. The samples were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), specific surface area (BET) and electrochemical measurements, respectively. Among the synthesized cathode materials, Li2FeSiO4 obtained with 1.5 mol of sucrose, showed the best electrochemical performance in terms of discharge capacity, cycling stability and rate capability. Discharge capacity of 130 mAh/g at C/20, 88 mAh/g at C/2 and 44 mAh/g at 2C were obtained with no capacity fading after 50 cycles.
Place, publisher, year, edition, pages
2012. Vol. 205, 456-462 p.
Lithium-ion batteries, Lithium iron orthosilicate, Combustion synthesis
Engineering and Technology Inorganic Chemistry
Research subject Chemistry with specialization in Inorganic Chemistry
IdentifiersURN: urn:nbn:se:uu:diva-172804DOI: 10.1016/j.jpowsour.2012.01.079ISI: 000301828300060OAI: oai:DiVA.org:uu-172804DiVA: diva2:516357