Electrochemical performances of Co-doped LiFePO4/C obtained by hydrothermal method

Controllable synthesis of nano-sized LiFePO 4 /C via a high shear mixer facilitated hydrothermal method for high rate Li-ion batteries

“…However, the inherently low electronic conductivity ($10 À9 SÁcm À1 ) and ionic conductivity ($1.8Â10 À14 cm 2 ÁS À1 ) are the two major obstacles of LiFePO 4 material, which results in noteworthy capacity loss during highrate discharge, making it unsuitable for high-power battery applications [5]. Over the past few years, tremendous efforts have been devoted to overcome these issues and improve the overall electrochemical performance of LiFePO 4 , including decreasing LiFePO 4 particles to nanometer size [6,7,8], doping with supervalent ions [9,10], coating with electronic conductive agents [11,12], creating a fast ion-conducting surface phase [13] or changing the morphology [14].…”

Synthesis and properties of LiM II PO 4 (M II = Mg, Mn 0.5 Mg 0.5 , Co 0.5 Mg 0.5 ) affected by isodivalent doping and Li-sources

“…In addition, the intensities, peak sharpness and Table 3 are compared with those reported in the standard data and found to agree well. The lattice parameters and cell volumes of LiMn 0.5 Mg 0.5 PO 4 and LiCo .5 Mg 0.5 PO 4 compounds changed slightly compared with the standard data (PDF # 84-0342, LiMgPO 4 ), which indicate the influence of mixed isodivalent metal ions on the surface of Li-binary-metal(II)-PO 4 (LiM II 0:5 Mg 0.5 PO 4 , M II ¼ Mn or Co) particles and almost affects the bulk [34]. The lattice parameters of LiM 0.5 Mg 0.5 PO 4 compound decrease prominently, which agrees well with the XRD pattern of 2q angle shifts.…”

Improvement of electrochemical and electrical properties of LiFePO4 coated with citric acid

“…[20,21]. Many sources of carbon, such as ascorbic acid [20], lactose [21], sucrose [22], glucose [23], carbon nanotube [24], and graphene [25], were recognized as suitable ones for this purpose. However, the carbon source must be inexpensive, the amount used must be optimized, and the carbon coating must be uniform, in order to guarantee an excellent conducting network on the LiFePO 4 particles [26,27].…”