U.S. Made Graphene Super Micro Capacitors

It is understood that American scientists have recently developed a supercapacitor based on graphene technology. The charging rate is much higher than that of ordinary batteries. It takes only 5 seconds for an iPhone to be fully charged. Due to the use of graphene as the material, this capacitor is ultra-small and highly integrated, and is believed to revolutionize mobile phones, new energy vehicles and other industries.

In order to miniaturize the product, the team chose a graphene material with only one atomic thickness. Even more surprising is that the manufacture of such supercapacitors does not require high-precision equipment, and an ordinary DVD recorder can complete the entire production process.

Previously, the traditional lithography process for manufacturing micro-supercapacitors required a lot of human labor, which made it difficult to reduce the cost and price of the products and hindered their commercialization prospects. Today's optical writing technology using ordinary DVD recorders can be mass-produced on a large scale at a fraction of the traditional production cost. The research team stated that using this technology, they used inexpensive materials to make more than 100 miniature super batteries on a single disc, which took less than half an hour.

In addition to the production process, the super capacitor also made a considerable effort in product design. In general, in order to maximize the storage capacity of a super battery, it is necessary to maximize the surface area of ​​the positive and negative electrodes. The team's initial design was to stack multiple layers of graphene material like a sandwich in a sandwich, but the effect was poor.

After being improved, in the latest design, they placed the graphene electrodes side by side as fingers intertwined with each other. The results show that this method maximizes the surface area of ​​the electrode, which is far higher than the stacking method.

Richard Cannell, a professor at the School of Engineering and Applied Science at the University of California, Los Angeles, says that for supercapacitors, it is only "quickly" a quantitative upgrade. "Small" is its greatest value. He said: "For a long time, miniaturization and miniaturization of electronic products have often encountered obstacles in energy storage systems. Excessive battery size has dragged down the entire product's flexibility and compactness." The new supercapacitor not only has a small size, but can be easily integrated into other accessories.

The research team stated that it is actively liaising with parts manufacturers to promote the market-oriented development of the product.