Effects of magnesium doping on electronic conductivity and electrochemical properties of LiFePO4 prepared via hydrothermal route

Optimization of Electrochemical Performance of LiFePO4/C by Indium Doping and High Temperature Annealing

“…However, the poor electronic conductivity and slow diffusion of lithium ion in bulk LiFePO 4 have been major challenges requiring new electrode material engineering. To improve electronic conductivity and reduce lithium ion diffusion length, many approaches, such as reducing the particle size to nanoscale [2][3][4][5], coating the particles with conductive carbon [6][7][8][9][10][11][12], and doping LiFePO 4 with various cations [13][14][15][16][17][18][19][20] have been proposed. In addition, LiFePO 4 decomposes above 700 • C leading to in-situ formation of conductive iron phosphides (Fe 2 P, FeP, Fe 3 P), and compounds with superior lithium-ion diffusion coefficients, such as, Li 3 PO 4 and Li 2 FeP 2 O 7 [21][22][23][24][25][26].…”

“…In addition, cation doping at Li and Fe sites in LiFePO 4 have been investigated by several researchers [13][14][15][16][17][18][19][20] to improve the electrochemical properties of LiFePO 4 . Substitution of Mg, Al, Na at Li sites [14,15,19] have been shown to improve the overall electrochemical properties of LiFePO 4 .…”

“…Substitution of Mg, Al, Na at Li sites [14,15,19] have been shown to improve the overall electrochemical properties of LiFePO 4 . Theoretical calculations by Islam et al [20] have suggested, on energetic grounds, that LiFePO 4 , is favorable for divalent dopants (e.g., Mg, Mn, Co), but not tolerant to aliovalent doping (e.g., Nd, La, In) on either Li (M1) or Fe (M2) sites.…”

Effect of Different Calcination Temperatures and Carbon Coating on the Characteristics of LiFePO4 Prepared by Hydrothermal Route

“…This route has some advantages such as simple process and relatively low crystallization temperature and thus energy consumption [23]. In addition, the impurities could also be controlled during the reaction process [24].In this work, LiFePO 4 was prepared using the hydrothermal route. The characteristics of the material after calcination at various different temperatures are presented.…”

“…This route has some advantages such as simple process and relatively low crystallization temperature and thus energy consumption [23]. In addition, the impurities could also be controlled during the reaction process [24].…”