A metal-nitrilotriacetic acid composite negative electrode material for a lithium battery and a preparation method thereof
A technology of nitrilotriacetic acid and negative electrode materials, which is applied in the direction of battery electrodes, negative electrodes, secondary batteries, etc., can solve the problems of long charging and discharging time, achieve the effects of expanding specific surface area, strong complexation ability, and improving reaction utilization rate
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Embodiment 1
[0025] A metal-nitrilotriacetic acid composite negative electrode material for a lithium battery, the detailed preparation process of which is as follows:
[0026] 1. Complexation reaction between metal salt solution and nitrilotriacetic acid
[0027] The complexation reaction is carried out in a flask with ultrasonic vibration and a mechanical stirrer. First, dissolve copper chloride in deionized water to form a 0.1mol / L metal ion solution and put it into the flask. Turn on the stirrer and ultrasonic vibration, slowly Add nitrilotriacetic acid to obtain a metal salt-nitrilotriacetic acid complex aqueous solution, and the molar ratio of added nitrilotriacetic acid to metal ions is 1:0.5. The rotational speed of the mechanical stirring is controlled at 150r / min.
[0028] 2. Hydrothermal polymerization
[0029] Add the complex mixture prepared in the first step into the autoclave, turn on the autoclave, set the temperature to 110°C, feed nitrogen to maintain the pressure at 0....
Embodiment 2
[0033] A metal-nitrilotriacetic acid composite negative electrode material for a lithium battery, the detailed preparation process of which is as follows:
[0034] 1. Complexation reaction between metal salt solution and nitrilotriacetic acid
[0035] The complexation reaction is carried out in a flask with ultrasonic vibration and a mechanical stirrer. First, nickel nitrate is dissolved in deionized water to form a 0.2mol / L metal ion solution and put into the flask. Turn on the stirrer and ultrasonic vibration, and slowly add Nitrilotriacetic acid to obtain metal salt-nitrilotriacetic acid complex aqueous solution, the molar ratio of added nitrilotriacetic acid to metal ions is 1:1. The rotational speed of the mechanical stirring is controlled at 300r / min.
[0036] 2. Hydrothermal polymerization
[0037] Add the complex mixture prepared in the first step into the autoclave, turn on the autoclave, set the temperature to 120°C, feed nitrogen to maintain the pressure at 0.75MPa,...
Embodiment 3
[0041] A metal-nitrilotriacetic acid composite negative electrode material for a lithium battery, the detailed preparation process of which is as follows:
[0042] 1. Complexation reaction between metal salt solution and nitrilotriacetic acid
[0043] The complexation reaction is carried out in a flask with ultrasonic vibration and a mechanical stirrer. First, dissolve cobalt nitrate in deionized water to form a 0.4mol / L metal ion solution and put it into the flask. Turn on the stirrer and ultrasonic vibration, and slowly add The nitrilotriacetic acid is used to obtain a metal salt-nitrilotriacetic acid complex aqueous solution, and the molar ratio of the added nitrilotriacetic acid to the metal ion is 1:1.5. The rotational speed of the mechanical stirring is controlled at 300r / min.
[0044] 2. Hydrothermal polymerization
[0045] Add the complex mixture prepared in the first step into the autoclave, turn on the autoclave, set the temperature to 130°C, feed nitrogen gas to m...
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