This news is very interesting, and the people have given various interpretations, such as fully charging the mobile phone for 20 seconds in the future. However, let's take a look at Huawei's own official introduction, mainly including the following points:
1) As you can see from the website, the English name of technology is Graphene assisted Li-ion battery. If translated, it is not even "strengthening". If translated directly into Chinese, "auxiliary" is more accurate. Note that Huawei said this himself, not the author.
2) Three aspects to improve the performance: adding special additives to the electrolyte to remove trace moisture and avoid high-temperature decomposition of the electrolyte; The modified large single crystal ternary material is selected as the negative electrode of the battery to improve the thermal stability of the material; At the same time, the use of graphene, a new material, can achieve efficient heat dissipation between lithium-ion batteries and the environment.
A) In fact, everyone who has studied in the electrochemical industry knows that adding additives to lithium electrolyte to inhibit water is the most basic and universal, and it is also a necessary way to solve the problem. In order to improve the performance of electrolyte at high/low temperature, there are corresponding additives. This kind of promotion can be said to be quite satisfactory, but it is far from the surprise.
B) modifying large single crystal ternary materials. The application of this material can reduce the specific surface area, reduce side reactions, and the gas expansion will be much better at high temperature, so it is helpful for high temperature performance. However, this route also sacrifices some other properties: the long diffusion distance of large-size single crystal will inevitably weaken the diffusivity-related performance of the battery, so the demand for fast charging of this battery will only be farther than that of ordinary batteries, not closer.
C) Graphene promotes heat dissipation. Huawei has always attached great importance to graphene, and related news has emerged one after another. However, under such a breakthrough news, Huawei only wrote graphene for heat dissipation, but did not write that it can be used as a conductive agent or an electrode active material. In fact, the high thermal conductivity of graphene is recognized, and the high-performance heat dissipation film made of graphene also has strong promotion significance.
These three technologies can be analyzed: large single crystal ternary materials have long been concerned by quite a few laboratories at home and abroad, and Samsung, Panasonic and other enterprises have research and patent applications. Graphene heat dissipation is the most common application idea in graphene industry. So this innovation is closer to the progress of engineering integration.
3) The performance of the battery is obtained by combining the above three points: "The charge-discharge test in high temperature environment shows that the temperature rise of graphene-based high-temperature lithium-ion battery is 5℃ lower than that of ordinary lithium-ion battery under the same working parameters; After 2000 cycles at 60℃, the capacity retention rate still exceeds 70%. After storage at 60℃ for 200 days, the capacity loss is less than 13%, "said Dr. Li Yangxing.
Generally speaking, the above three technologies are not uncommon in the battery industry. Many schools and laboratories have tried to optimize additives.
As can be seen from the above, the battery has made a breakthrough in high temperature performance, and its stability and life have been greatly improved. Huawei itself said that this technology can be mainly promoted in high temperature and harsh environment, but this is far from the focus of attention in the field of mobile phones and electric vehicles. On the contrary, it has many connections with the emerging energy storage industry.
Of course, next, Huawei announced its own fast charging plan, so many people speculated that Huawei's technology would help fast charging and achieve the goal of "charging for one minute and battery life for several days". However, according to the extensive knowledge of the industry, I am afraid this is somewhat divorced from scientific practice.
The research progress announced by Huawei this time is worth encouraging, and the usage changes of "graphene-based lithium-ion battery" compared with the previous "graphene battery" are also intriguing. This technology performs well at high temperature. However, whether Huawei's technology is still in the laboratory stage, whether it has the ability of pilot scale-up, and whether it can maintain comprehensive performance and cost after scale-up, we also need to continue to pay attention. Mass production of batteries is not easy. Huawei's batteries have been supplied by ATL, Xinwangda and other enterprises. We also hope that Huawei can achieve the same results in the field of batteries as in the field of communication, and lead the development of China manufacturing.
The patriotism of the folk media can be understood, but it is probably not advisable to interpret and extend the meaning of this technology without restrictions. The progress of technology is left to the people in the technical circle to judge. Generally speaking, it is still the choice that is responsible for the society and wastes the least resources for the society. In addition, for the progress of manufacturing and technology, we should be more persistent and practical, and less speculative and impetuous, so that our technology can be by going up one flight of stairs and China manufacturing can be created by China at an early date.