Which is better, graphene battery and lithium battery?

Graphene batteries and lithium batteries are better? A few years ago, we knew that graphene batteries are hot in batteries, but recently they have become inactive. The mainstream battery on the market is still lithium battery. Which is better, graphene battery or lithium battery? 1. Advantages and disadvantages of graphene battery Graphene cell: Graphene cell is a cell plane membrane made of carbon atoms sp2 hybridized. It is a kind of quasi-two-dimensional data with the thickness of only one atomic layer, so it is also called monoatomic graphite. Taking advantage of the many characteristics of lithium ions in the rapid and continuous movement between the graphene surface and the electrodes, a new energy battery has come out. (1) The advantages of graphene batteries: 1) The storage capacity is three times that of the best products on the market. The specific energy value of lithium batteries (whichever is the most advanced) is 180wh/kg, while the specific energy value of graphene batteries exceeds 600whkg. An electric car powered by this battery can travel 1,000 kilometers, and the charging time is less than 8 minutes. 3) Service life. Its life span is four times that of traditional hydrogenated batteries and twice that of lithium batteries. 4) Lightweight. The characteristics of graphene reduce the weight of the battery by half, thereby increasing the power of the machine supporting the battery. 5) Compared with traditional batteries, graphene has more advantages. In terms of life, its life span is twice that of lithium batteries and four times that of hydrogenated batteries. 6) It is faster and more durable than lithium batteries under high temperature. (2) Graphene battery defects: 1) Graphene has not yet entered the practical stage, and there is still a long way to go before mass production. 2) In the market, these graphene batteries are not pure graphene batteries either. He just added some graphene-related skills to lithium batteries. Compared with traditional lithium batteries, the performance improvement is minimal. In addition, the cost of graphene is very high, and its manufacturing process is also very high. The manufacturing process of graphene batteries is not yet mature, because it is still in the laboratory stage and cannot be processed on a large scale. 3) Incompatible process characteristics. In other words, the excessive specific surface area of u200bu200bgraphene will cause many technical problems to the existing lithium battery relaxation and homogenization processes. Considering that the tuning process of a battery factory is exhausting and it does not have enough profit margins to promote a breakthrough performance goal, who would be interested in this technology? The surface properties of graphene are more affected by chemical conditions. Large, there are many problems in batch stability, cycle life, etc., which cannot meet the specific requirements of lithium battery processing. 2. Advantages and disadvantages of lithium batteries (1) Advantages of lithium batteries 1) High energy density, its volume energy density and mass energy density can reach 450W. H/dm3,150W. H/kg, is still in progress. 2) The output voltage is high (approximately 3.6v), which is 3 times that of nickel-cadmium batteries and nickel-l batteries. 3) The output power is large. 4) Low self-discharge, less than 10% per month, less than half of ni-cd and ni-ml. 5) Nickel-cadmium batteries and nickel-metal hydride batteries do not have the same recall effect, and the cycle function is better. 6) It can be charged and discharged quickly. The capacity of 1C can reach the standard, reaching more than 80% of the capacity. 7) High charging power, almost 100% after the first charge. 8) Wide working temperature scale, -30~+45℃. With the improvement of electrolyte and positive electrode, it is expected to widen it to -40~+70℃, and the low temperature can be widened to -60℃. 9) Do not repair. 10) It is more environmentally friendly and is called a green battery. 11) Long life, 100% DOD charging and discharging can reach more than 900 times; when shallow depth (30% DOD) charging and discharging is selected, the number of cycles exceeds 5000 times. (2) Defects of lithium batteries 1) The high cost is mainly due to the high price of positive electrode data LiC002. With the continuous development of positive electrode technology, LiMn204, LiFeP04, etc. can be selected as the positive electrode, which is expected to greatly reduce the cost of lithium batteries; 2) There must be a special maintenance circuit to prevent over-charge or over-discharge; 3) Poor compatibility with ordinary batteries, because generally 3 ordinary batteries (3.6V) can be replaced by lithium batteries. Judging from the current situation, lithium batteries have advantages over graphene batteries in terms of development technology, complexity, manufacturing cost and market economy. Disclaimer: Some pictures and content of articles published on this site are from the Internet, please contact to delete if there is any infringement. Previous: Overview of the performance characteristics of polymer lithium batteries