Rechargeable lithium battery anode material phosphoric acid copper silver and preparation method thereof
A positive electrode material, copper phosphate technology, applied in battery electrodes, chemical instruments and methods, circuits, etc., can solve the problems of seeing copper and silver phosphate, and achieve good rate performance, cycle performance, and high specific capacity.
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Embodiment 1
[0029] 3.62g Cu(NO 3 ) 2 ·3H 2 O was dissolved in 30mL deionized water, and 3.80g Na was weighed 3 PO 4 12H 2 O into a 150mL beaker, add 50mL deionized water, add a magnet and stir on a magnetic stirrer to dissolve it. When the two solutions were uniform and transparent, the Cu(NO 3 ) 2 The solution was slowly added dropwise to Na 3 PO 4 solution with constant stirring. The solution was then suction filtered and washed with deionized water. The operation was repeated 5 times, and then the precipitate was dried at room temperature to obtain the y(Ag 3-2x Cu x PO 4 )(1-y)C x=1.5, y=1 material. According to the mass ratio of positive electrode material: acetylene black: binder = 80: 10: 10, after ball milling and mixing, apply it on the treated aluminum foil, dry it at 120 ° C, and press molding at 20 MPa to obtain a positive electrode for rechargeable lithium batteries .
Embodiment 2
[0031] 3.62g Cu(NO 3 ) 2 ·3H 2 O was dissolved in 30mL deionized water, and 3.80g Na was weighed 3 PO 4 12H 2 O into a 150mL beaker, add 50mL deionized water, add a magnet and stir on a magnetic stirrer to dissolve it. When the two solutions were uniform and transparent, the Cu(NO 3 ) 2 The solution was slowly added dropwise to Na 3 PO 4 solution with constant stirring. The solution was then suction filtered and washed with deionized water. Repeat the operation 5 times, then dry the precipitate at room temperature, and then put it in a muffle furnace for high temperature treatment at 500°C for 5 hours to obtain the y(Ag 3-2x Cu x PO 4 )(1-y)C x=1.5, y=1 material. According to the mass ratio of positive electrode material: acetylene black: binder = 80: 10: 10, after ball milling and mixing, apply it on the treated aluminum foil, dry it at 120 ° C, and press molding at 20 MPa to obtain a positive electrode for rechargeable lithium batteries .
Embodiment 3
[0033] The y(Ag obtained by embodiment 2 3-2x Cu x PO 4 )(1-y)C x=1.5, y=1 material 0.9g is mixed with 0.1g acetylene black, and ball milled in an agate ball mill jar for 6h (500r / min), the y(Ag 3-2x Cu x PO 4 )(1-y)C x=1.5, y=0.9 material. According to the mass ratio of positive electrode material: acetylene black: binder = 80: 10: 10, after ball milling and mixing, apply it on the treated aluminum foil, dry it at 120 ° C, and press molding at 20 MPa to obtain a positive electrode for rechargeable lithium batteries .
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