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On the 18th, the reporter learned from the Shanghai Silicate Institute of the Chinese Academy of Sciences that the scientists had developed a high-performance supercapacitor electrode material—nitrogen-doped ordered mesoporous graphene. The material has excellent electrochemical energy storage characteristics and can be used as an "ultra-strong battery" for electric vehicles: charging takes only 7 seconds and can last for 35 kilometers. Related research results were published on the 18th in the world's top journal "Science".
A supercapacitor is an electrochemical energy storage device between a conventional capacitor and a battery. Due to its high power density, long cycle life, safety and reliability, it has been widely used in many fields such as hybrid electric vehicles and high-power output devices. How to make supercapacitors have both high power and high energy, and scientists have not found ideal materials for a long time.
In order to solve this problem, the Chinese Academy of Sciences Shanghai Institute of Silicate cooperated with Peking University and the University of Pennsylvania to continue research. Huang Fuqiang's research team finally found that graphene is the best choice for supercapacitor electrodes.
Through repeated experiments, design, and synthesis, Huang Fuqiang's research team found that nitrogen-doped ordered mesoporous graphene performed best.
Not only can achieve high energy density, high power density, but also through the use of water-based electrolyte, so that non-toxic, environmentally friendly, inexpensive, safe and reliable.
According to reports, the new type of graphene supercapacitors are lightweight, non-flammable, and non-explosive, and can be prepared at low cost to achieve scale production. Because of its obvious competitive advantages over lead-acid and nickel-metal hydride batteries, it is far superior to lithium batteries in terms of rapid charging and discharging. Therefore, the “super battery†can be widely used in existing hybrid electric vehicles and high-power output devices. The replacement. Where is the magic of graphene?
Xi Jinping visited the Graphene Research Institute during his visit to the UK
Graphene is likened to the mystery of the sci-fi masterpiece "Three-body" and "Two-way foil" and is predicted to change the "magic material" of the 21st century. In 2010, Professor Andre Heim and Konstantin Novoselov of the University of Manchester in the UK won the Nobel Prize in physics for the discovery of graphene. China's scientific research on graphene is also in a leading position in the world.
According to the Xinhua News Agency, on 23 October, during the visit to China, President Xi Jinping visited the National Graphene Research Institute of the University of Manchester, UK, and received the Nobel Prize in Physics Professor Novoselov to introduce the study of graphene. , visited the underground clean laboratory of graphene products display and production of graphene.
Xi Jinping pointed out that under the current background of a new round of industrial upgrading and science and technology revolution, the new materials industry will become the cornerstone and precursor of the future development of high-tech industries, and will have a profound impact on the development of the global economy, science and technology, and the environment. China is a large country of graphite resources and one of the most active countries in the research and application development of graphene. Sino-British can achieve "strong alliances" in the field of graphene research.
At present, the graphene industry has been incorporated into the national strategic layout. "Made in China 2025" selected 10 major advantages and strategic industries to achieve key breakthroughs. In the first key area of ​​technology roadmap, graphene materials have become one of the four major priorities of cutting-edge new materials. In the “13th Five-Year Plan†new energy vehicle key project, new materials such as graphene are also listed as key development areas.
Unique characteristics: Excellent strength over diamonds, excellent electrical conductivity
Graphene is actually a two-dimensional crystal that is only one layer thick and is composed of carbon atoms that are peeled off from graphite. The graphite used for the pencil lead is equivalent to a stack of countless layers of graphene. It sounds like ordinary graphene, but it has many unique features. Popularly speaking, at present in the natural world, this thing is the thinnest, most solid, extremely conductive, and almost omnipotent in the industrial field.
How thin is graphene? Thickness is only one hundred thousandth of ordinary paper. It can be stretched indefinitely, bent to a large angle without breaking, can withstand high pressures, and has extraordinary thermal and electrical conductivity. Its strength is stronger than diamonds, "seconds" steel, needles do not enter, water does not spill into.
Can not produce energy? China has achieved lower cost production
In order to study graphene, scientists have experienced hardships. The graphene sheets originally obtained in the laboratory were worth more than the most precious diamonds. 100 square nanometers of graphene cost thousands of euros and is invisible to the naked eye.
After continuous exploration, industrial production of graphene has been successful. Nowadays, Changzhou, Jiangsu Province has a national-level graphene industrial base and gathers more than 50 companies. The graphene technology here is world-class. The graphene cost price has also been greatly reduced due to mass production. Currently, the price of one square meter of graphene sheet is around 300 yuan.
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