Preparation method and application of manganese germanate nanosheets with high charge and discharge capacity
A manganese germanate and nanosheet technology, applied in circuits, electrical components, battery electrodes, etc., can solve problems such as large safety hazards and low graphite capacity, and achieve reduced production costs, high charge and discharge capacity, and the preparation method is simple and easy to operate. Effect
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[0027] The invention provides a method for preparing manganese germanate nanosheets with high charge and discharge capacity, the preparation method comprising the following steps:
[0028] 1) Mn(Ac) 2 GeO in aqueous solution with NN-diisopropylcarbodiimide 2 The aqueous solutions were all stirred uniformly; preferably, stirred for 1 h.
[0029] Then the Mn(Ac) 2 Aqueous solution was added dropwise to GeO containing NN-diisopropylcarbodiimide 2 In the aqueous solution, mix and stir evenly to obtain a mixed solution;
[0030] 2) Put the cleaned foamed copper into the mixed solution described in step 1), then transfer it to the reactor, keep it warm at a constant temperature for several hours, and after the reaction is completed, you can get the foam grown on the foamed copper. manganese germanate nanosheets.
[0031] In a specific embodiment of the present invention, preferably, in step 1), Mn(Ac) 2 Aqueous solution with GeO containing NN-diisopropylcarbodiimide 2 When th...
Embodiment 1
[0040] This embodiment provides a method for preparing manganese germanate nanosheets with high charge and discharge capacity, the steps are as follows:
[0041] 1) 1mmolGeO 2 Dissolve the powder in 40mL of deionized water, then add 1.5mL NN-diisopropylcarbodiimide, and stir for 1h;
[0042] 2) Add 1mmolMn(Ac) 2 Dissolve in 20mL deionized water, stir for 1h;
[0043] 3) Mn(Ac) 2 Aqueous solution was added dropwise to GeO containing NN-diisopropylcarbodiimide 2 aqueous solution, then stirred for 1 h;
[0044] 4) Put the cleaned foamed copper into the above mixture, then transfer it to a 100mL reaction kettle, and place it at 180°C for 20h;
[0045] 5) The above reaction can obtain the manganese germanate nanosheets grown on the copper foam.
[0046] Such as figure 1 As shown, the scanning electron micrograph shows that the thickness of the manganese germanate nanosheets is about 10nm. The manganese germanate nanosheets prepared in this example were used as negative elec...
Embodiment 2
[0048] This embodiment provides a method for preparing manganese germanate nanosheets with high charge and discharge capacity, the steps are as follows:
[0049] 1) 1.5mmolGeO 2 Dissolve the powder in 40mL of deionized water, then add 1mL NN-diisopropylcarbodiimide, and stir for 1h;
[0050] 2) 1.8mmolMn(Ac) 2 Dissolve in 20mL deionized water, stir for 1h;
[0051] 3) Mn(Ac) 2 Aqueous solution was added dropwise to GeO containing NN-diisopropylcarbodiimide 2 aqueous solution, then stirred for 1 h;
[0052] 4) Put the cleaned copper foam into the above mixture, then transfer it to a 100mL reaction kettle, and place it at 180°C for 24h;
[0053] 5) The above reaction can obtain the manganese germanate nanosheets grown on the copper foam.
[0054] The manganese germanate nanosheets prepared in this example were used as negative electrode materials for lithium-ion batteries, and their electrochemical properties were tested. Concrete method is with embodiment 1. The LandBT2...
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