According to a report by the physicist organization network on August 31, American scientists have developed a lighter and faster charging battery that can power spacesuits and even Mars probes, and can also be mounted on satellites. The research was funded by the National Aeronautics and Space Administration (NASA), and related papers were published in the recently published American Chemical Society Journal "Applied Materials and Interface".
One of the researchers, Clemson University scientist Ramakrishna Podila said: “Most satellites mainly get energy from the sun, but satellites must also be able to store energy when they are in the shadow of the earth. The battery should be as light as possible. The heavier the satellite, the higher the mission cost."
The Podilla team developed the latest battery using silicon materials. Silicon can pack more charge, which means more energy can be stored in lighter batteries. Although scientists have always attached great importance to the power storage capacity of silicon, silicon breaks down into smaller fragments during discharge. In view of this, Podilla et al. replaced them with tiny silicon "nano" particles, which can improve stability and provide longer cycle life.
The researchers first used a carbon nanotube material called "Buckypaper" (Buckypaper) to make a layer-by-layer structure, and then sandwiched silicon nanoparticles-like a "sandwich" to create a new type of battery.
Podila said that with this internal structure, even if the silicon particles are broken, they are still "in the sandwich."
The researchers said: “Independent carbon nanotube sheets connect silicon nanoparticles to each other electrically. These nanotubes form a quasi-three-dimensional structure. Even after 500 cycles, silicon nanoparticles can cluster together and reduce Resistance due to the fracture of nanoparticles."
Batteries made of silicon and other nanomaterials can not only increase the capacity, but also charge the battery at a higher current, thereby shortening the charging time. Because the new battery uses nanotubes as a buffer mechanism, the charging speed is 4 times faster than the current one. In addition, the new battery has a lighter weight, faster charging speed and greatly improved efficiency, which is also more beneficial to astronauts wearing battery-powered spacesuits. (Reporter Liu Xia)
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