What Are The Problems Of Graphene Lithium Battery Anode Materials?

- Aug 18, 2017-

In recent years, graphene has received a lot of attention from society, and the media is full of news about "graphene batteries".

At this point the broad masses may wonder: graphene how many use this material, can rely on it to solve the present materials, batteries, etc, in a series of technical bottleneck, help electric vehicles, energy storage, and other industries to realize the leap?The following is the correct answer given by the online combination.

1. Cost

Traditional conductive carbon black and graphite are sold for tons of tons (tens of thousands of yuan). Can the price of graphene be reduced to this price?Even if the graphene in some media reports is reduced to 3 yuan per gram, it will cost 3 million yuan per ton.Want to know, are now used in lithium batteries of various materials, are about a ton of tens of thousands of things, and every day under the social from all walks of life demand price pressure, replace completely unrealistic with graphene.

If could be more cheaper, there are also companies claim to graphene can approach generally the price of carbon black and graphite, in fact, the materials used in is graphite piece (there may be dozens of layers), no single or several layers of graphene.At this time, the problem that the manufacturer appears is false publicity hype concept, contrary to the integrity of the government and the general taxpayer.

2. The process features are not compatible

It is that the surface area of graphene is too large, which will bring a lot of technological problems to the process of dispersing the existing lithium ion batteries.If the battery factory tuning process is dead, and there is no performance indicator breakthrough, enough profit space drive, who is willing to go to this technology?The surface characteristics of graphene are greatly affected by chemical status, the batch stability, cycle life and so on are many problems, so far, we can't meet the detailed requirements of lithium battery production.

3. Low efficiency

If graphene does the negative pole, it is theoretically at most two times the capacity of the graphite cathode, the first time it is inefficient and the performance is greatly affected by the surface state.

4.It is expensive to make graphene as a conductive agent

Graphene can be used as a conductive agent to promote fast filling, which can theoretically improve the performance of the multiplier. However, if the dispersion process is not in place, all are in the air.There is no reason to use expensive graphene.And graphene is a 2D material, and if you combine it with an electrode active material, it can clog up the passage of lithium ion diffusion.So if it's practical, it's good or bad, it's hard to say.

5. High cost of graphene functional coating aluminum foil

As for the function of graphene coating aluminum foil, its actual performance with the average carbon coated with aluminum foil (A123 joint henkel development) and the much improved, but the cost and process complexity increase many, the possibility of the technology is very low.

Anyhow, graphene anode materials for lithium ion battery, compared with the traditional carbon materials, there is no obvious advantages on performance, and nanometer materials is difficult, costly, development prospects are grim.