As the source of power energy and electric power, battery plays a very important role. Graphene battery is a new energy battery developed by using the characteristics of rapid and large amount of movement of lithium ions between graphene surface and electrode. The mainstream batteries for electric vehicles are lithium batteries, which have a moderate energy density and are relatively mature and have advantages in manufacturing cost.
What is a graphene battery?
Graphene is a two-dimensional, hexagonal, honeycomb lattice of carbon nanomaterials made of carbon atoms in sp2 hybrid orbitals. In short, graphene is a new material. After peeling a sheet of graphite into a single layer, the material is only one carbon atom thick. Graphene has excellent optical, electrical, mechanical properties, the material science, micro-nano processing, energy, biological medicine and drug delivery has important application prospect, is known to man high strength, good toughness, light weight, high light transmittance, good electrical conductivity of new nano materials, but also by the researchers as the "king of the new material".
Graphene is the world's thinnest, hardest and least resistive nanomaterial, and the so-called graphene battery is a new energy battery developed by taking advantage of the rapid and extensive movement of lithium ions between the graphene surface and the electrode.
Graphene batteries have many advantages:
1. The range of a single voyage can be up to 1000 km;
2. It only takes less than 8 minutes for a single full charge;
3. The service life is four times that of traditional hydrogenated battery and twice that of lithium battery;
4. Half the weight of conventional batteries;
5. Battery cost is 77% lower than lithium battery
However, at the present stage, graphene batteries cannot be mass-produced. Firstly, cost is the problem. Traditional conductive carbon black and graphite are sold by ton, while graphene is sold by gram, with raw materials of 3 million yuan/ton. Moreover, the process is incompatible, and the graphene surface area is too large, which will bring a lot of process problems to the process of dispersion and homogenization of existing lithium ion batteries. Maybe it can be done in the lab, but it will take a long time for it to be used for mass production. Even the existing graphene batteries are not graphene batteries in the real sense, they are just doped with graphene in lithium batteries.Lithium batteries are weak,but they cannot be replaced temporarily.It is unlikely that graphene batteries will replace lithium batteries to power electric vehicles for some time to come. Some experimental data on graphene batteries show better performance than lithium batteries, but the technology has not yet reached mature standards. For every product on the market, there is a long process from research and development to listing, such as safety, stability, practicability and cost performance. Only with these features can it become a product that meets the needs of consumers.
Therefore, graphene battery has considerable potential and is the best material to replace lithium battery. However, although graphene batteries cannot replace lithium batteries in a real sense, with the continuous progress of technology, one day graphene batteries will replace lithium batteries and become the mainstream of the power battery industry.