Search results for "LiFePO4"
showing 3 items of 3 documents
Elektroforētiska LiFePO4 kārtiņu iegūšana un fizikāli ķīmiskās īpašības
2015
Elektroforētiska LiFePO4 kārtiņu iegūšana un fizikāli ķīmiskās īpašības. Bikova K., zinātniskais vadītājs: Dr. chem. Bajārs G., maģistra darbs, 46 lappuses, 31 attēls, 9 tabulas, 23 literatūras avoti. Latviešu valodā. Maģistra darbā elektroforētiski uzklātas LiFePO4, grafēna un ogles kvēpu kompozītmateriāla kārtiņas. Optimizēti kārtiņu uznešanas apstākļi, veikta kārtiņu struktūras, sastāva un morfoloģijas analīze, izmantojot pulvera rentgendifrakcijas analīzi (XRD), Ramana spektroskopiju, termogravimetrisko analīzi (TGA) un skenējošo elektronu mikroskopiju (SEM). Pētītas uznesto kārtiņu elektroķīmiskās īpašības, izmantojot hronopotenciometriju un elektroķīmiskās impedances spektroskopiju.
Characteristics of LiFePO4 obtained through a one step continuous hydrothermal synthesis process working in supercritical water
2009
International audience; The olivine-like material LiFePO4 was prepared via a continuous hydrothermal synthesis process working from subcritical to supercritical water conditions. The influence of some processing parameters–temperature and reaction time–was investigated in terms of material purity, grain size and morphology. Supercritical conditions were found to be attractive to synthesize in one step a well-crystallized material without impurities. The primary particles size was in the nanometric range. They showed a natural tendency to form micron size agglomerates, which were supposed to be the cause of the limited capacity, as demonstrated through a cross study using laser particle size…
A Review of using spray pyrolysis through Sol-gel materials in the synthesis of cathode materials for lithium-ion batteries
2016
Over the years, new synthesis routes of the cathode electrochemical active material for lithium-ion batteries have improved remarkably to optimize their capacity and cycle life performance. This review study focused on the use of some techniques to synthesize the common cathode materials (LiCoO2, LiMn2O4, LiFePO4). The most common and simplest synthesis method was the mixing of powders in their solid-state form and heating them at relatively high temperatures over long periods. Other methods included the formation of sol-gel products that could be either heat-treated more or could be used directly by means of a spray pyrolysis method producing the desired active material. The spray pyrolysi…