Lithium metal negative electrode for secondary battery, preparation method and application of lithium metal negative electrode
A secondary battery and metal lithium technology, which is applied in secondary batteries, electrode manufacturing, battery electrodes, etc., can solve problems such as poor stability, and achieve the effects of preventing clogging, high specific surface characteristics, and preventing lithium dendrite growth
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Problems solved by technology
 Example 1
 Sputter a layer of nano-Au particles as a lithium deposition induction layer on the bottom of the Ni foam collector (any plane) by ion sputtering (using a gold plate as a target, sputtering for 200s at a current of 20 mA) , The thickness of the nano Au particle layer is about 10 nm. Li was deposited in Au modified porous nickel by electrodeposition in a glove box to prepare a porous lithium negative electrode (Au / Ni foam). The SEM image of the prepared porous lithium anode is shown in figure 1 Part (a); see the EDS diagram figure 1 Part (b).
 Using lithium metal as the positive electrode, 1M LiTFSI / DOL: DME (volume ratio = 1:1) contains 1%wtLiNO 3 As the electrolyte, it is assembled with the lithium negative electrode prepared by the present invention to form a 2032 button lithium ion battery (press figure 2 The method is assembled, that is, the surface where the Au particles are sputtered is set at the far end of the diaphragm), the diaphragm us...
 Example 2
 A layer of nano-ZnO particles are grown on the bottom of the carbon paper (CP) current collector as a lithium deposition inducing layer by magnetron sputtering (using zinc oxide as the target material, sputtering for 15 seconds under 80W sputtering power), nano-ZnO The thickness of the layer is 5 nm. A 2025 button lithium-ion battery was assembled in a glove box with Celgard 2400 as a separator. Li was deposited on a ZnO-modified carbon paper current collector by electrodeposition to prepare a porous ZnO / C lithium negative electrode. Take the carbon paper lithium negative electrode with the same structure without coating the lithium deposition induction layer as a comparison sample (see the morphology and energy spectrum Figure 5 ). The test found that the ZnO / C lithium negative electrode with lithium deposition trap layer of the present invention is at 1mA / cm 2 The cycle life under charge and discharge current density is 5 times that of ordinary carbo...
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