Surfactant-assisted mild hydrothermal synthesis to nanostructured mixed orthophosphates LiMnyFe1−yPO4/C lithium insertion cathode materials

Surfactant-assisted mild solvothermal synthesis of nanostructured LiFePO4/C cathodes evidencing ultrafast rate capability

“…Such a result accounts for the Fe 2+ /Fe 3+ redox reaction to be a quasi-reversible diffusion-controlled system, as in a completely reversible system the gap would be independent from the scan rate. This is in good agreement with the results previously reported on LiFePO 4 [38]. Some important differences with respect to the other samples under study were observed in the case of LF-20Et: the peak profiles were in fact more narrow, with a higher peak current and lower potential gap, indicating a lower conductivity restriction and diffusion limitation.…”

“…6). In all cases, a response similar to the standard LiFePO 4 was observed: merely a couple of redox peaks centred around 3.42 V vs. Li + /Li due to the two-phase oxidation/ reduction reaction of the Fe 2+ /Fe 3+ redox couple upon Li + deinsertion/insertion [38]. No other electrochemical reaction occurred.…”

Nano-sized LiFePO4/C composite with core-shell structure as cathode material for lithium ion battery

“…During the reaction, the precursor of LiFePO 4 could chelate with R-F solution by simple coordination reaction and would be located inside the R-F solutionstabilized by the surfactant CTAB,which is often used to control the size, morphology of particles in synthesis of LiMPO 4 (where M =Fe, Mn) [27][28][29]. The R-F solution acts as a carbon source which will polymerize on the surface of LiFePO 4 precursor.…”

Metal tetrabromophthalocyanines mediate the structure and electrochemical performance of lithium iron phosphate as cathode materials for lithium-ion batteries

“…Since it was first reported in 1997 [12], great advances have been achieved in order to overcome the limitation of LiFePO 4 . Remarkably, combination of conductive carbon coating and metal doping has been proved to be an effective way to improve the specific capacity and rate capability because the transport lengths of both electrons and ions would be shortened by the carbon layer and the space for intercalation/deintercalation of Li + would be enlarged due to the crystal lattice distortion by doped metal [13][14][15]. Our previous work proved that the two factors could be provided simultaneously by using metal phthalocyanines (MPcs) as additives to mediate the structure and electrochemical performance of LiFePO 4 , which can simplify the preparation process of the composites [16].…”