On April 6, the research team of Dai Hongjie, a professor of chemistry at Stanford University in the United States, published a paper entitled “An ultrafast rechargeable aluminium-ion battery” in the journal Nature. The paper stated that their team developed an aluminum-ion battery. Really realized the "quick charge and discharge", and the number of cycles even as high as 7500 times, far more than ordinary lithium batteries. The aluminum battery is characterized by high efficiency and durability, ultra-fast charging, low flammability, high safety, and low cost.

When I saw the news, I naturally thought whether this aluminum battery could be used in electric cars. From the day when the first electric vehicle was launched, electric vehicles were faced with two problems: difficulty in charging and low mileage. It can be said that the development of electric vehicles is in the final analysis subject to the delay in the development of battery technology. The author believes that the ignited point of the new round of automobile revolution will surely begin with the breakthrough of battery energy.

Although the author has a great disgust that the various media have abused the tedious so-called "curve-taking" theory - I believe that this is an opportunistic mentality - but it is not entirely hopeless. If the auto makers of different industries no longer just regard electric vehicles as a defensive product, or they are opportunistic products that are speculative in policy, they can actually thoroughly understand the technology, seize the opportunity, embrace the revolution, and miss the Chinese automobile of the internal combustion engine revolution. In the challenge of a round of electric vehicles, a perfect "curve passing" was ushered in. However, Tesla is ahead of others. Apple has also entered the automotive industry with a high profile. Traditional automobile manufacturers such as BMW have also launched i3, i8 and other heavy products in the electric vehicle field. In this round of electric car revolution, whether it can preemptively take the initiative will depend on the speed of response of auto manufacturers.

The current car styling is full of science and technology, and the future seems to be within reach, but their hearts, the batteries, are sold out and sold. Nowadays, many domestic and foreign brands of electric vehicles that are listed on the market, including the BMW i3, which I had the privilege of participating in a test drive, have a practical mileage of approximately 100km after a single charge. There are few pure electric vehicles that can exceed 200km. Of course, Tesla is an exception.

In recent years, consumer electronics products have developed rapidly toward intelligence, and automobiles have taken a giant leap forward toward electricization. Both of these developments have a common bottleneck: batteries! A few years ago, Nokia’s feature machines were still able to charge once a week, and today a few years later people are accustomed to smart phones in the hands of a day, this is not a change in people's habits, but because of battery technology constraints. Has we become accustomed to the fact that traditional fuel vehicles can fill up to seven or eight hundred kilometers at a time and can we become accustomed to less than 200 kilometers of electric vehicles? I am afraid it is difficult! The power consumption of the mobile phone can be quickly solved with the charging treasure - it also brings along the prosperity of the mobile phone charging treasure industry. Of course, this is also a later story, let alone not mention - and the electric vehicle mileage is weak, can it be solved with the charging treasure? ? The answer is obvious. If it is possible to store space and load capacity for another external battery, why not directly increase the battery capacity?

I think this is not the future of electric cars.

It is well known that the capacity of a battery depends on the energy density of the battery and the actual volume of the battery. Confined to the actual space of the car, the electric car basically does not have much change in the battery volume. If it can make a fuss about the energy density of the battery, then the battery has a lot of imagination. The figure below is the wiki energy density for various energy carriers. It can be clearly seen that the energy density of aluminum has far surpassed our common gasoline, diesel, natural gas and other energy sources, and far exceeds the most widely used lithium-ion batteries in the bottom left corner of the world. This is one of the reasons why the author is so excited about the appearance of aluminum batteries. Battery technology has been developing for more than a hundred years. Many of the physics and chemistry theories designed by battery technology stopped as early as before the Second World War. After half a century, the bottleneck of the battery industry has become more and more obvious, and the contradiction with modern consumer products has become increasingly prominent. It's time to make a hero. It's time for a real battery revolution. The aluminum battery, I believe, is the future of the battery.

How far are we from the aluminum battery?

Although news reports gave an optimistic message, aluminum batteries became the perfect battery for all kinds of advantages in news reports. The author who can be an engineering student feels that all this may not be so optimistic. The author believes that the existence of anything in the world cannot be without defects.

A battery from the technology to the product must take into account the battery's energy density, specific capacity, cycle life, charge and discharge speed, self-discharge rate, memory, size, weight, environmental friendliness, cost and other factors. Did the aluminum batteries developed by the Dai Hongjie team perfectly withstand these challenges?

As described in the report, aluminum batteries have the advantages of low cost, high safety, and rapid charging. So, the cost is low? Which is the lower cost? Can it be low enough to ignore R&D costs? Can it be as low as industrialization costs similar to lithium batteries? If aluminum batteries are used on a large scale, are they cost-effective? Apart from the cost, does the battery's safety and reliability have sufficient experimental and theoretical support? In a good applause, there is no way to look at these things. Only quietly wait and follow up. After all, technology is not equal to products, and products are not equivalent to being able to industrialize. Although battery development has been a bottleneck, there are new theoretical breakthroughs that are always good. Even Dai Hongjie’s team has given us a glimmer of dawn. These should be Exciting. Let us quietly look forward to a new revolution in aluminum batteries for consumer electronics products, and look forward to delivering a perfect answer for aluminum batteries to electric vehicles!

Although the automobile industry is mature enough, maturity does not mean that it is backward. Mature, there can still be a big enough breakthrough: the collision of traditional cars and the Internet, the collision of traditional cars and new energy, coupled with the endless breakthroughs in basic science, these give people too much reverie. The writer often lamented that he was born too early and could not see the climax of this round of the automobile revolution. Whether the electric car is a ladder to the future of the automobile industry is not an opportunity for the Chinese brand car saltwater to stand up. I will wait and see.

The automotive industry is by no means a sunset industry. The automobile industry I saw was a round of Asahi that stood out on the coast overlooking the East China Sea!

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