Black-phosphorus-based composite negative electrode material and preparing method thereof
A technology of negative electrode material and black phosphorus, which is applied in the field of black phosphorus-based composite negative electrode material and its preparation, can solve the problems of poor coulombic efficiency, rapid capacity decay and low capacity retention rate of black phosphorus electrode material, so as to solve the problem of poor cycle performance, The effect of low cost and low cost of raw materials
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[0035] Example 1
[0036] In this embodiment, a black phosphorus-based composite negative electrode material was prepared by the ball milling method (wherein, red phosphorus: germanium oxide = 2:1, and the amount of graphite added is 50% of the total mass of the three raw materials: red scale, germanium oxide and graphite). The mass ratio of medium black scale, germanium oxide and graphite is 2:1:3.
[0037] The preparation method is as follows:
[0038] (1) Weigh 2 parts of red phosphorus powder and 1 part of germanium oxide powder, mix the two to obtain a mixture, and then add the mixture to a stainless steel ball mill tank for the first ball milling to obtain the first ball milled product; during the first ball milling The ball to material ratio is 20:1 (that is, 60 parts of stainless steel balls are added), the speed is 300rpm / min, and the ball milling time is 20h;
[0039] (2) Weigh 3 parts of graphite powder and add it to the first ball milling product obtained in step (1), and...
Example Embodiment
[0043] Example 2
[0044] In this embodiment, a black phosphorus-based composite negative electrode material is prepared by the ball milling method (wherein, red phosphorus: germanium oxide = 0.25:1, and the amount of graphite added is 50% of the total mass of the three raw materials: red scale, germanium oxide and graphite). The mass ratio of medium black scale, germanium oxide and graphite is 0.25:1:1.25.
[0045] The preparation method is as follows:
[0046] (1) Weigh 1 part of red phosphorus powder and 4 parts of germanium oxide powder, mix the two to obtain a mixture, and then add the mixture to a stainless steel ball milling tank for the first ball milling to obtain the first ball milled product; during the first ball milling The ball-to-material ratio is 20:1 (that is, 100 parts of stainless steel balls are added), the speed is 300rpm / min, and the ball milling time is 20h;
[0047] (2) Weigh 5 parts of graphite powder, add it to the first ball milled product obtained in step ...
Example Embodiment
[0049] Example 3
[0050] In this embodiment, a black phosphorus-based composite negative electrode material was prepared by the ball milling method (wherein, red phosphorus: germanium oxide = 2:1, and the amount of graphite added is 80% of the total mass of the three raw materials: red scale, germanium oxide and graphite). The mass ratio of medium black scale, germanium oxide and graphite is 2:1:12.
[0051] The preparation method is as follows:
[0052] (1) Weigh 2 parts of red phosphorus powder and 1 part of germanium oxide powder, mix the two to obtain a mixture, and then add the mixture to a stainless steel ball mill tank for the first ball milling to obtain the first ball milled product; during the first ball milling The ball to material ratio is 20:1 (that is, 60 parts of stainless steel balls are added), the speed is 300rpm / min, and the ball milling time is 20h;
[0053] (2) Weigh 12 parts of graphite powder and add it to the first ball milling product obtained in step (1), a...
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