Lithium secondary battery with metal fluoride as positive electrode material
A lithium secondary battery and cathode material technology, applied in secondary batteries, battery electrodes, circuits, etc., can solve the problems of low energy consumption in the preparation process, complicated preparation process, and difficult realization, and achieve simple preparation method and high coulombic efficiency , The effect achieved by the reaction conditions
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Embodiment 1
[0034] Take 0.1molL -1 Fe(NO 3 ) 3 50ml of the solution was placed in a flask, and then the 60ml concentration was 0.3molL -1Slowly add ammonia water into the flask (the mass ratio of base to metal salt is 3.6:1). During this process, the solution in the flask was ultrasonically oscillated, and precipitation appeared. After the reaction was completed, the ultrasonic oscillation was stopped, and then the precipitate was obtained by suction filtration. The precipitate was first washed twice with deionized water, and then washed once with methanol. The washed precipitate was dried in vacuum at 120° C. for 1 h to obtain ferric hydroxide.
[0035] Put the ferric hydroxide in a container made of polytetrafluoroethylene, then quickly add 12ml of HF with a mass fraction of 40% (the molar ratio of ferric hydroxide to hydrofluoric acid is 1:10), and seal it the container. During this process, the solution in the container was magnetically stirred and kept in a constant temperature ...
Embodiment 2
[0039] Take 0.1molL respectively -1 CuCl 2 Solution 20ml and 0.1molL -1 FeCl 3 Solution 80ml, placed in a flask, then 100ml concentration is 0.3molL -1 Slowly add KOH solution into the flask (the ratio of alkali to metal salt is 3:1), during this process, the solution in the flask is mechanically stirred, and precipitation occurs. When the reaction is over, stop stirring, and then suction filter to obtain the precipitate. , the precipitate was washed twice with deionized water and then once with acetone. The washed precipitate was dried in vacuum at 40° C. for 12 h to obtain a mixture of ferric hydroxide and copper hydroxide.
[0040] The mixture of iron hydroxide and copper hydroxide is placed in a polytetrafluoroethylene container, and then 20ml of HF solution with a mass fraction of 40% is quickly added thereto (the mixture of iron hydroxide and copper hydroxide and hydrofluoric acid The volume ratio is 1:10), and seal the container. During this process, the solution i...
Embodiment 3
[0044] Take 0.1molL -1 FeCl 3 Solution 100ml, placed in a flask, then 150ml concentration is 0.3molL -1 The KOH solution was slowly added into the flask (the ratio of the alkali to the metal salt was 4.5:1). During this process, the solution in the flask was magnetically stirred, and precipitation occurred. After the reaction was completed, the magnetic stirring was stopped, and then suction filtered to obtain Precipitation, the precipitate was washed once with methanol, and then washed twice with distilled water. The precipitate was dried in vacuum at 120°C for 1 h to obtain ferric hydroxide.
[0045] The ferric hydroxide was placed in a container made of polytetrafluoroethylene, and then 20ml of HF solution with a mass fraction of 40% was quickly added therein (the molar ratio of ferric hydroxide to hydrofluoric acid was 1:9), and Seal the container. During this process, the solution in the container was magnetically stirred and kept in a constant temperature water bath ...
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