Recently, Zhejiang University Department of Polymer Science and Engineering developed a new aluminum - graphene battery, this battery can not only overcome the temperature, and other issues, efficient charging performance, you can achieve 'charging 5 seconds call two hours.'
Research team members told reporters that at present the development of this new battery is still in the laboratory stage, to achieve commercial mass production, still need to overcome multiple technical problems, there is still a long way to go.
Figure: Flexible aluminum - graphene battery lit 'ZJU 120' LED string lights
Charge 10 times a day can also be used for 70 years
The new aluminum-graphene battery is graphene positive electrode, negative aluminum metal, as long as the two 'thin film' in series together, you can light a group of LED lights.
According to R & D team, the new aluminum-graphene battery is to replace the existing lithium battery.
As the most widely used smart phone battery, lithium batteries have many difficult to solve the shortcomings, in addition to low temperature, high temperature performance instability, the limited life of lithium batteries, often after one or two years of use, greatly reduced endurance.
Laboratory data show that the new aluminum-graphene battery can work in the environment of -40 ℃ to 120 ℃ .In -30 ℃ environment, you can achieve 1,000 charge and discharge performance unabated, and in the environment of 100 ℃ Achieve 4.5 million cycles of stability.In addition, the new battery flexibility features, resulting in its bending 10,000 times, the capacity can still be maintained.
If a charge-discharge process, as a cycle, the new aluminum - graphene battery after 25 million cycles, still maintain 91% performance.Research team estimates, if the smart phone with this battery, even if the charge of 10 per day Times, can also be used for nearly 70 years.
December 15, the team's research results, published in the core journals Science Advances.
Left: Battery in ice-salt bath; right: Battery does not burn at high temperature
Up to 1.1 seconds full charge
In 2015, Dai Hongjie, a research group at Stanford University in the United States, published a paper proposing the use of pyrolytic graphite foam to make positive electrodes for high-performance aluminum ion batteries. The R & D team at Zhejiang University, inspired by this theory, started the development of new batteries.
Professor R & D team member Professor Gao said that as the most abundant metal element in the crust, aluminum is cheap and safe, and is an ideal anode material in battery preparation.But for many years, due to the delay of matching cathode material, The overall performance of aluminum batteries is difficult to get into. After the introduction of graphene, the problem solved.
'This aluminum-graphene' super 'battery has much higher rate performance and longer cycle life than other batteries. "Superb said that battery performance depends critically on the state in which electrons and ions' run' between the positive and negative electrodes , The electrode material should allow as much electrons and ions as possible to 'run smoothly'.
According to superb view, although some smart phones also have fast charge function, but it seems the battery is full soon, the actual battery life is not long.And in the laboratory, the new battery can achieve 1.1 seconds full charge, and the energy loss slight.
Highly introduced, this data shows that if the future of new batteries applied to the phone, 'charging 5 seconds to talk for 2 hours', can become a reality.
