Preparation method of high-performance lithium manganese phosphate material for lithium-ion power batteries
A power battery, lithium manganese phosphate technology, applied in the direction of battery electrodes, secondary batteries, chemical instruments and methods, etc., can solve the problems of impure materials, poor performance, poor conductivity of lithium manganese phosphate, etc., and achieve high rate discharge capacity Strong, high-performance effects
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
preparation example Construction
[0027] Such as figure 1 Shown, the preparation method of the high-performance lithium manganese phosphate material for the lithium ion power battery that the present invention adopts, comprises the following steps successively:
[0028] 1) The raw materials containing lithium ions and phosphate ions are respectively prepared into aqueous solutions;
[0029] 2) Use a metering pump to inject the raw material solution into the normal pressure reactor in proportion to react;
[0030] 3) After the reaction is completed, filter and separate the solid to obtain the solid, wash and dry the solid;
[0031] 4) Mix the obtained solid with raw materials containing manganese ions, iron ions, magnesium ions and nickel ions in a solvothermal reaction medium to perform a solvothermal reaction;
[0032] 5) After the reaction is completed, filter to obtain the solid, wash and dry it;
[0033] 6) Coating the solid matter obtained in step 5) with organic matter as a precursor, and then perform...
Embodiment 1
[0048] Prepare the following aqueous solution: 3.3mol·dm -3 LiOH solution, 1.0mol·dm -3 h 3 PO 4 solution. Add an appropriate amount of deionized water bottom liquid (submerged in the lowest stirring paddle of the reactor) into the reactor, and set the temperature to 40°C. LiOH solution and H 3 PO 4 The solution injection rate was set at 1.0dm 3 min -1, injected at the same time, a total of 30min injection. After the addition of the reactants was completed, sink for 30 min. Filter, wash the precipitate 5 times with deionized water, and dry to obtain the precursor. Determination of the phosphorus content of the precursor. Each mole (based on phosphorus) of the precursor is mixed with 0.93mol of manganese sulfate, 0.05mol of ferrous sulfate, 0.01mol of nickel sulfate and 0.01mol of magnesium sulfate, and 1:1 (volume ratio) polyethylene glycol that is three times the mass of the mixture is added. Alcohol 400 aqueous solution, after mixing well, carry out solvothermal r...
Embodiment 2
[0051] Prepare the following aqueous solution: 3.0mol dm -3 LiOH solution, 0.95mol·dm -3 h 3 PO 4 solution. Add an appropriate amount of deionized water bottom liquid (submerged in the lowest stirring paddle of the reactor) into the reactor, and set the temperature to 35°C. LiOH solution and H 3 PO 4 The solution injection rate was set at 1.5dm 3 min -1 , and injected at the same time, a total of 20min injection. After the addition of the reactants was completed, sink for 40 minutes. Filter, wash the precipitate 5 times with deionized water, and dry to obtain the precursor. Determination of the phosphorus content of the precursor. Mix each mole of precursor (based on phosphorus) with 0.94mol of manganese acetate, 0.02mol of ferrous acetate, 0.02mol of nickel acetate and 0.02mol of magnesium acetate, and add 3:1 (volume ratio) diethylene di Alcohol (3) water (1) solution, after mixing well, carry out solvothermal reaction at 120°C for 20h. Filter, wash the precipita...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More