Which is better, lithium ion battery or graphene battery?

Graphene batteries were relatively hot in the battery industry in the past few years, but finally fell silent. The mainstream battery in the market is still lithium ion batteries. Which is better, graphene battery or lithium ion battery, depends on the advantages and disadvantages of their own material characteristics and market applications. Make a comparison and distinguish between good and bad under what circumstances. 1. Advantages and disadvantages of graphene battery Graphene battery: Graphene battery is a honeycomb flat film formed by sp2 hybridization of carbon atoms. It is a quasi-two-dimensional material with a thickness of only one atomic layer, so it is also called Single atomic layer graphite. A new energy battery has been developed by using the characteristics of rapid and massive shuttle movement of lithium ions between the graphene surface and the electrodes. (1) Graphene battery advantage: The power storage capacity is three times that of the best products on the market. The specific energy value of a lithium-ion battery (whichever is the most advanced) is 180wh/kg, while the specific energy of a graphene battery exceeds 600whkg. An electric car powered by this battery can travel up to 1,000 kilometers, and its charging time is less than 8 minutes. long lasting. Its service life is four times that of traditional hydrogenated batteries and twice that of lithium-ion batteries. Lightweight. The characteristics of graphene make the weight of the battery can be reduced to half of the traditional battery, which can improve the efficiency of the machine loaded with the battery. Graphene has more advantages than traditional batteries. In terms of service life, its service life is twice that of lithium-ion batteries and four times that of hydrogenated batteries. Faster charging speed and more durable than lithium-ion batteries at high temperatures. (2) Disadvantages of graphene batteries: Graphene has not yet reached the practical stage, and there is still a long way to go before mass processing. These graphene batteries on the market are not pure graphene batteries. They just doped some graphene-related technologies on the basis of lithium-ion batteries. Compared with traditional lithium-ion batteries, the performance improvement it brings is only Only a little bit. In addition, the cost of graphene is very high, and its manufacturing process is also very high. The manufacturing process of graphene batteries is still not mature enough. At present, it is only in the laboratory stage and it cannot reach the point of mass production. Process characteristics are not compatible. That is, the excessively large specific surface area of u200bu200bgraphene will cause a lot of process problems in the processes of dispersing and homogenizing the existing lithium batteries. If the battery factory adjustment process will be exhausted, and there is no sufficient profit margin driven by the breakthrough progress of performance indicators, who wants to use this technology? The surface properties of graphene are greatly affected by the chemical state, and there are many problems with batch stability, cycle life and so on. At present, it cannot meet the detailed requirements of lithium-ion battery processing. 2. Advantages and disadvantages of lithium-ion batteries Lithium-ion batteries (1) The advantages of lithium-ion batteries have high energy density, and their volumetric energy density and mass energy density can reach 450W.h/dm3 and 150W.h/kg, respectively, and continue to improve. The average output voltage is high (about 3.6V), which is 3 times that of Ni-Cd and Ni-l batteries. The output power is large. Self-discharge is small, less than 10% per month, less than half of Ni-Cd and Ni-Ml. There is no memory effect like Ni-Cd and Ni-MH batteries, and the cycle performance is superior. It can be charged and discharged quickly, and the capacity can reach more than 80% of the nominal capacity when charging at 1C. The charging efficiency is high, basically 100% after the first cycle. The operating temperature range is wide, -30~+45℃. With the improvement of electrolyte and positive electrode, it is expected to expand to -40~+70℃, and the low temperature may expand to -60℃. No maintenance required. It is more 'friendly' to the environment and is called a green battery. Long service life, 100% DOD charging and discharging can reach more than 900 times; when using shallow depth (30% DOD) charging and discharging, the number of cycles has exceeded 5000 times. (2) The disadvantages of lithium-ion batteries are high cost, mainly due to the high price of the cathode material LiC002. With the continuous development of cathode technology, LiMn204, LiFeP04, etc. can be used as the anode, which is expected to greatly reduce the cost of lithium batteries; special protection is required Circuit to prevent overcharging or overdischarging; compatibility with ordinary batteries is poor, because generally 3 ordinary batteries (3.6V) can be used to replace lithium batteries. At present, graphene has not yet reached the practical stage, and there is still a long way to go before mass processing. The huge shortcomings of lithium-ion batteries in terms of safety, endurance, environmental pollution, and charging speed have begun to severely limit the development of major high-tech industries. Therefore, many corporate Ru0026D departments have set their sights on more advanced graphene batteries. Above. Graphene batteries have the highest strength, best toughness, light weight and excellent electrical conductivity. As early as a few years ago, Huawei announced a fast charging technology. It only takes five minutes to charge a 3000 mAh graphene battery to nearly half the power. It can be seen that graphene batteries are not only suitable for new energy vehicles, but also can be widely used in our mobile phone field, but this is only in the experimental stage, and it takes a long way to go before it can be applied in the market. Graphene has more advantages than traditional batteries. In terms of service life, its service life is twice that of lithium-ion batteries and four times that of hydrogenated batteries. In terms of weight, its weight is only about half of traditional batteries. In terms of charging rate. Graphene batteries can be increased dozens of times or even hundreds of times. Summary: Through the comparison of the above conditions, as far as the current situation is concerned, from the perspective of the maturity of Ru0026D technology, manufacturing costs and market economic benefits, lithium-ion batteries have more advantages than graphene batteries. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What are the advantages of cylindrical lithium batteries