Tesla's battery research team and partners have published a new research report, stating that they have discovered a new lithium battery technology with higher energy density and more stability than solid-state batteries, which may change the development path of power battery technology in the next stage. Previously, many battery research institutions have adopted 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 this technical report is: LiDFOB / LiBF4 liquid electrolyte non-anode lithium metal battery research report. The core information shows that many previous studies were not optimistic about the next stage of lithium metal batteries. It is believed that the traditional liquid electrolyte used in the battery must be replaced by a solid electrolyte to maintain the long-term stable cycle and high energy density required.
However, in the latest experiments, it was found that after 90 charge-discharge cycles of the anodeless lithium metal battery using LiDFOB / LiBF4 liquid electrolyte, it can still have 80% of the battery capacity and high stability. Inferior to solid state batteries.
The report also mentioned how to solve the problem of replacing traditional graphite anodes with lithium metal without using solid electrolytes. 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, at present, solid electrolytes cannot achieve a stable, dendritic state (stability) after multiple charge and discharge. At the same time, there are also problems in mass production. The production line requires billions of dollars of investment.
And if the traditional liquid electrolyte solution of LiDFOB / LiBF4 liquid electrolyte is used, the existing high-density battery can be mass-produced quickly by the existing manufacturing equipment while satisfying the safety, density and life.