Graphene battery is better or lithium ion battery is better

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) Advantages of graphene batteries: 1) 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. 2) An electric car powered by this battery can travel up to 1,000 kilometers, and its charging time is less than 8 minutes. 3) Long service life. Its service life is four times that of traditional hydrogenated batteries and twice that of lithium-ion batteries. 4) Light weight. 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. 5) 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. 6) Faster charging speed and more durable than lithium-ion batteries at high temperatures. (2) Disadvantages of graphene batteries: 1) Graphene has not yet reached the practical stage, and there is still a long way to go before mass production. 2) 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, it brings performance improvements. It's 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. 3) Incompatible process characteristics. 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-ion 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 production. 2. Advantages and disadvantages of lithium-ion batteries (1) Advantages of lithium-ion batteries 1) High energy density, its volume energy density and mass energy density can reach 450W.h/dm3 and 150W.h/kg, respectively, and continue improve. 2) The average output voltage is high (about 3.6V), which is 3 times that of Ni-Cd and Ni-l batteries. 3) Large output power. 4) The self-discharge is small, less than 10% per month, less than half of Ni-Cd and Ni-Ml. 5) Without the same memory effect as Ni-Cd and Ni-MH batteries, the cycle performance is superior. 6) It can be charged and discharged quickly, and the capacity can reach more than 80% of the nominal capacity when charging at 1C. 7) The charging efficiency is high, basically 100% after the first cycle. 8) Wide operating temperature range, -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℃. 9) No maintenance required. 10) It is more environmentally friendly and is called a green battery. 11) 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) Disadvantages of lithium-ion batteries 1) High cost, the most important thing is the high price of cathode material LiC002. With the continuous development of cathode technology, LiMn204, LiFeP04, etc. can be used as cathodes, which is expected to greatly reduce the cost of lithium-ion batteries; 2) There must be a special protection circuit to prevent overcharging or overdischarging; 3) The compatibility with ordinary batteries is poor, because generally 3 ordinary batteries (3.6V) can be used to replace lithium-ion 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: Introduction to knowledge about lithium-ion battery life