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Author ：Iflowpower – Portable Power Station Supplier
Is the negative electrode material that circulates from different batteries, can the battery can be consistent? In order to discuss the characteristics of different re-use negative electrode materials, the negative electrode material from different batteries is recovered, and the negative electrode is re-formed, and the morphology is observed with SEM, as shown. It can be seen that the morphology of VG and RAM is very different, and the VG material is a graphite layer of the sheet structure. The reaction is composed of a smaller sheet shape, which is not as good as the VG material.
Epoxification, but does not affect the overall cycle performance. Figure. SEM (a) of VG material, (b) two different source RAM materials SEM (C).
(D). (E), in addition to, a small scale expanded test, prove Feasibility of recovering negative electrode materials from waste batteries for lithium batteries. Compared to experimental operation, in order to ensure the safety of the dismantling process, the expansion test needs to be carried out in an inert atmosphere.
The results show that the negative electrode material in the waste battery can be subjected to a mechanical manner from the commercial battery, and the battery produced from the depleted battery is not significantly attenuated in the initial 10 week cycle. Using RAM that does not know its loop history and manufacturing quality, you can truly simulate LIB recovery conditions in real world. The effect of putting RAM into the new negative electrode manufacturing can be seen from SEM, and there is a new way for waste lithium battery recovery.
Although the morphology of RAM is different, there is no significant difference in performance. In the entire experiment, although it is not widely, it is still possible to observe the phenomenon of pre-lithium graphite material, so that the possibility of lithium embedding carbon material can be proved. Through the same treatment, the negative electrode produced by RAM and VG exhibits similar circulating stability, and the RAM negative is higher.
The first cycle of RAM and VG batteries show that although it is used, the life is finally, and RAM still maintains crystallinity. The improvement of the first cycle capacity is mainly due to the negative electrode material after lithium ion embedding cycle, and does not cause the consumption of Li content. However, it is necessary to confirm that pre-lithiance helps to re-formation of SEI in the RAM battery, require further research.
In addition, more data needs to be tested, such as changes in long-term cycles, magnification dependence, etc. According to the analysis, the lithium battery is in the charge and discharge process, and the negative electrode material will inevitably take more or less crystal structure change, and the battery negative material termination of life is desirable to consistent with the unused negative electrode material performance structure or impossible. At the same time, the rationality of the sampling in the test should be considered that electrochemical performance test is not comprehensive, and it is necessary to further verify.
The negative electrode material re-use is a good waste treatment method, classify different types of negative electrode materials, and screening grading according to product use can ensure product quality and waste use efficiency. .
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