Recently, according to foreign media reports, the Tesla battery research team and partners released a new research report, saying that they have discovered a new lithium battery technology with higher energy density and more stability than solid-state batteries, which may change the next stage of power batteries. Technology development route. Previously, many battery research institutes have taken solid-state batteries as the first choice for the next stage, and energy density is also the most important technical parameter for power batteries.
The full name of the technical report: LiDFOB / LiBF4 liquid electrolyte anode metal lithium metal battery research report. The core information shows that many previous studies are not optimistic about the next stage of lithium metal batteries, and believe that the traditional liquid electrolyte used in the battery must be replaced by a solid electrolyte to maintain the long-term stable cycle life and high energy density. However, in the latest experiment, it was found that the non-anode lithium metal battery using LiDFOB / LiBF4 liquid electrolyte can still retain 80% of the battery capacity and high stability after 90 charge and discharge cycles, and it is not in terms of energy density. Inferior to solid state batteries.
The report also mentioned how to solve the problem of replacing the traditional graphite anode with lithium metal without using a solid electrolyte. The report shows that another potential way to achieve lithium metal anodes is to use solid electrolytes, which is considered by many studies to be the most feasible technical means in the future. However, the current solid electrolyte cannot achieve a stable dendrite-free state (stability) after repeated charging and discharging. At the same time, there are problems in mass production. The production line requires billions of dollars of investment. If the traditional liquid electrolyte solution of LiDFOB / LiBF4 liquid electrolyte is used, while the safety, density and life are met, the existing manufacturing equipment can quickly commercialize mass production of this new high energy density battery. (Author: Yao Jia)
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