It can be woven like a wool, can be folded like a cardboard, and can be attached to the body like a skin. This light and flexible material is actually a battery. Capacity is more than 600 mA per gram, cycle life is more than 1000 times, 500 times The above half-fold does not affect its performance... Recently, the new progress made by Professor Jin Zhong from the College of Chemistry and Chemical Engineering of Nanjing University in high-capacity flexible energy devices has attracted a lot of attention.
The cumbersome and hard-brick battery has limited the styling and application of many devices. This traditional energy device structure has been difficult to meet the development needs of portable and wearable devices. 'Can design some new electrode materials while satisfying Three characteristics of flexibility, electrical conductivity and high performance? 'This problem has caused the thinking of Admiralty. In the field of material chemistry for more than 10 years, Admiralty uses high flexibility of materials such as carbon nanotubes, graphene and inorganic nanofibers. Sexuality and electrical conductivity, used as an excellent flexible 'skeleton' for energy storage electrode materials. Based on these materials, the ingenious structure design, the sturdy and heavy battery gradually changed the traditional appearance in the hands of the Admiralty team. .
In general, there are two types of energy devices, one is responsible for energy storage, and the other is responsible for energy conversion. The former stores electrical energy as chemical energy and releases it when it is needed, which corresponds to a storage battery such as lithium ion. It is a chemical power device; the latter can often convert other forms of energy such as light energy into electrical energy, such as solar cells, and the corresponding energy device is called a physical power device. 'No matter which energy device, if it is made flexible, Portable and integrated, it is possible to open up new applications. In the 'Golden Bell' hand, the battery can be turned into a desired shape without a temper.
The photoelectric conversion efficiency reaches 9.5%, which can be bent, entangled, knotted, and can achieve fast charging in only 7 seconds. In addition to energy storage batteries, the Admiralty Group has also achieved new results in flexible solar cells. Based on the carbon nanofiber material, the team prepared a multi-functional coaxial nanocomposite fiber electrode material by modifying TiO2 and MoS2 two-dimensional materials. The flexible electrode solar cell with bendable and woven fabric was assembled by using the fiber electrode. And light-charged energy fiber, which achieves excellent performance and can be spontaneously charged spontaneously under illumination. Compared with traditional planar energy devices, fiber-optic energy devices are lighter in weight, more flexible, more integrated, and possibly In the future, large-scale production and application can be carried out by textile technology like polymer fiber, so as to meet the needs of various portable and wearable flexible electronic devices.
Imagine wearing clothes that can provide electricity and glow in the future. Your winter is no longer cold. Warning suits, watches, RF cards... Flexible batteries can be used to carry energy. In addition to civilian use, flexible batteries can also meet The energy supply needs of informational operations in the future. 'In the modern individual combat equipment, one-third of the soldiers' weight is from the battery, but the existing battery system can only last for 72 hours.' , 'Development quality is small, long battery life, high output power, high safety, more suitable for wearing new battery system, is of special significance in meeting defense applications such as information operations, drones, underwater vehicles, etc. . '
