3V lithium batteries are mainly lithium cobalt oxide. The current life-saving method is to move to higher voltages, which has obvious results. That is to say, manufacturers are out of safety considerations, although they have technical strength, the actual application is relatively traditional. Power 3V lithium batteries 2019 Most of the popular ones are 3 pieces of ncm333\/523\/622 in the positive stage and high-purity graphite pure battery cells in the negative stage. The specific energy is 160–230wh\/kg. After being made into a pack, it is about 140-160wh\/kg. Well, 811 is very close. After all, the price of cobalt has tripled in a year, and now it is more than 90,000 US dollars per ton.

Negative level. Now the industry believes that the key to practicality is the silicon oxide\/high-purity graphite composite type, which can ensure that the water content of silicon oxide is about 10%. Pure silicon has too many shortcomings, with an expansion rate of 300%. The circulation system is in a hurry and may be oxidized. Silicone\/high-purity graphite composite adhesive is more critical. These two together can increase the specific energy of the battery core by 50 The percentage is about 300wh\/kg. The time point is probably 2020. At that time, the pack had a 220wh\/kg. A car charging battery pack with a mileage of 400 kilometers would be more than 200kg. Compared with the original power lithium The battery lithium iron phosphate\/high-purity graphite solution has increased by nearly 3 times.

It is now a common view in the industry that all solid electrolytes have not arrived by 2025. The first problem is that the contact interface is unstable. The laboratory is mainly button-type. Due to insufficient pressure, the solid electrolyte often has poor contact with the electrode material and cannot charge and discharge stably. Secondly, it is Metal lithium flakes It cannot be cut too thin. The current leader in the industry can cut about 35-50μm, which limits the use. Judging from the current technology, there is no other energy storage material that can completely replace 3V lithium batteries. The next generation of 3V lithium batteries is estimated to be lithium batteries.