Which is better, graphene battery or lithium battery? Which is better, graphene battery or lead-acid battery?

Compared with lithium batteries, graphene batteries are obviously better, with the a

Which is better, graphene battery or lithium battery? Which is better, graphene battery or lead-acid battery?

Compared with lithium batteries, graphene batteries are obviously better, with the advantages of long life, high safety and fast charging speed. But friends who know about new energy vehicles know that lithium batteries are the most popular in the market now. So let's first look at the advantages and disadvantages of lithium batteries and graphene batteries.

1, lithium battery

Lithium batteries include lithium metal batteries and lithium ion batteries, among which lithium ion batteries can be divided into five categories: lithium cobalt oxide batteries, lithium manganate batteries, lithium iron phosphate batteries, lithium nickel oxide batteries and lithium ternary nickel oxide batteries. It can be said that most pure electric vehicles on the market now are lithium batteries.

The reason why the penetration rate is so high is mainly because lithium batteries have the advantages of low difficulty in mass production, mature technology, little environmental pollution and relatively high safety. In addition, the energy density and specific energy of lithium-ion batteries are also the best among commercial batteries at present, so lithium batteries are regarded by many people as the best solution for automobile power batteries at this stage.

However, lithium batteries are not perfect. At present, there are still some shortcomings such as slow charging speed and insufficient reliability. For example, a super fast charging vehicle needs about 1 hour even if it charges slowly. In addition, what about new energy vehicles now? Spontaneous combustion? There is still a lot of news, so although the performance of lithium batteries is excellent, they still can't meet people's psychological expectations.

2. Graphene battery

Graphene is a nano-material with the strongest electrical conductivity, the strongest thermal conductivity, the thinnest, the lightest and the hardest known to mankind. If this material is applied to the power battery, the battery has longer service life, stronger thermal stability, larger battery capacity and faster charging speed, and the comprehensive performance of the battery is far superior to that of the lithium battery.

Take Guangzhou Automobile Aian as an example. The brand said it would launch graphene batteries the year before last. Recently, it announced that a new car equipped with graphene battery can charge the battery to 80% in just 8 minutes, and the maximum cruising range can reach 1000 km. The charging speed of this model is six times that of vehicles equipped with ordinary batteries, and the new car can get a charging experience as convenient as refueling.

However, once the news that Aian mass-produced graphene batteries was issued, it was ridiculed by experts from all walks of life. Everyone thinks that Ai 'an is exaggerating publicity, because the most fatal disadvantage of graphene battery is its high cost and difficult preparation. First of all, the price of high-purity graphene is as high as several thousand yuan a gram, and the price is several times that of gold, so the cost of graphene batteries will far exceed that of lithium batteries.

In addition, it is very difficult to strip graphene from graphite. The existing technology does not support mass production, and it is unimaginable for car companies to realize mass production.

And some so-called on the market at present? Graphene battery? Is it just that there is graphite or a small amount of graphene in the lithium battery? Pseudographene? The battery is far from the real graphene battery. So many people regard Ai 'an's propaganda as a joke. It is generally believed that Aian will not launch a production version of graphene battery model.

To sum up, graphene battery has many advantages, but its fatal disadvantage is its high cost. Although GAC Aian claims to have mastered the self-developed three-dimensional structure (3DG) graphene preparation technology, which can achieve stable mass production with controllable cost, this car has not yet been listed. Therefore, it is best to consider lithium battery models when buying new energy vehicles at this stage.