• Present invention describes an improved method for synthesis of nano-sized LiFePO4/Carbon Composite using a tri-blocked copolymer-based surfactant assisted-hydrothermal process.

STEP 1

•  The LiFePO4/C composite is synthesized by surfactant-assisted hydrothermal method from the stoichiometric mixture of LiOH.H2O, FeSO4·7H2O & H3PO4 (3:1:1 molar ratio) using a tri-block copolymer Pluronic® 31R1 (average Mn ~3,300).

STEP 2.

• Dissolving 3 mL of the tri-block Pluronic® 31R1 copolymer in 15 mL of distilled water at 35°C & 30 mmol of LiOH.H2O was added to the surfactant solution.

STEP 3.

• Adding 10 mmol H3PO4 under stirring to obtain a milky white suspension and a 3 mL ethylene glycol was subsequently added into the resulting white suspension to disperse the inorganic salts;

STEP 4.

• Dissolving the requisite amount of ferrous sulphate (FeSO4.7H2O; 10 mmol) in 15 mL deionized water & adding with ascorbic acid (C6H8O6; 2.5 mmol)
• Finally, transfer the resulting suspension into a 150 mL Teflon-lined stainless-steel autoclave & heat at 180°C for 16h followed by washing the precipitate with water & ethanol & drying at 80°C after the hydrothermal reaction.