Amorphous Fe-Mo-O coated Fe2(MoO4)3 lithium ion battery negative electrode material and preparation method thereof
A lithium-ion battery, fe-mo-o technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of reducing the volumetric energy density of electrodes, poor cycle capacity, difficult LIB, etc., to achieve excellent ductility, improve Performance, easily transferable effects
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[0033] An amorphous Fe-Mo-O wrapped Fe 2 (MoO 4 ) 3 The preparation method of lithium ion battery negative electrode material, comprises the following steps:
[0034] 1) Dissolve an appropriate amount of iron salt in isopropanol, add an appropriate amount of ammonia water, and adjust the solution to alkaline to obtain solution A; weigh an appropriate amount of molybdenum salt, dissolve it in an appropriate amount of isopropanol, and stir to obtain solution B ;
[0035] According to the molar ratio, the amount of substances in iron salt and molybdenum salt is Fe:Mo=2:3. The iron salt is selected from at least one of iron chloride, iron acetate, iron nitrate, and iron sulfate; the molybdenum salt is selected from sodium molybdate, ammonium molybdate, ammonium molybdate tetrahydrate, tetramolybdenum heptahydrate At least one kind of ammonium acid.
[0036] 2) Add solution B to opaque solution A, mix well, add dilute hydrochloric acid solution, adjust the pH value to acidity ...
Embodiment 1
[0044] 0.4055g ferric chloride (FeCl 3 ) was dissolved in 20ml of isopropanol, an appropriate amount of ammonia was added, and the solution was adjusted to alkaline pH=8 to obtain solution A; 0.6621g of ammonium molybdate tetrahydrate (H 32 Mo 7 N 6 o 28 ), was dissolved in 20ml of isopropanol, and stirred to obtain solution B; solution B was added to opaque solution A, and after mixing evenly, dilute hydrochloric acid solution was added to adjust the pH value to acidity 3.5 to obtain light yellow mixed solution C; Solution C was placed in a three-necked flask, heated to reflux at 150°C for 8 hours to obtain a precipitate; the precipitate was washed with absolute ethanol and deionized water, and dried at 80°C to obtain the target product.
[0045] The sample obtained in embodiment 1 is characterized, and the results are shown in Figure 1 to Figure 4 .
[0046] figure 1 Coating crystalline Fe with amorphous Fe-Mo-O 2 (MoO 4 ) 3 XRD pattern of battery anode material sa...
Embodiment 2
[0054] 0.1336g ferric chloride (FeCl 3 ) was dissolved in 25ml of isopropanol, an appropriate amount of ammonia was added, and the solution was adjusted to alkaline pH=9 to obtain solution A; 0.2181g of ammonium molybdate tetrahydrate (H 32 Mo 7 N 6 o 28 ), was dissolved in 25ml of isopropanol, and stirred to obtain solution B; solution B was added to opaque solution A, after mixing evenly, dilute hydrochloric acid solution was added, and the pH value was adjusted to acidity 5 to obtain light yellow mixed solution C; Solution C was placed in a three-necked flask, heated to reflux at 200°C for 10 hours to obtain a precipitate; the precipitate was washed with absolute ethanol and deionized water, and dried at 60°C to obtain the target product.
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