They use a spraying process to manufacture large-area lithium-ion rechargeable batteries, which are composed of 5 layers of thin films, namely the positive electrode collector layer, the positive electrode material layer, the separator layer, the negative electrode material layer and the negative electrode collector layer. The researchers used bathroom tiles, resin films, glass, stainless steel plates, ceramic beer cups, etc. as substrates for trial production.
- **Achievements and inspiration**: After the prototype on the tile is equipped with solar cells, the power output by the solar cells can be stored in the battery formed on the 9 tiles, and the LED string lights arranged in the "RICE" text can be lit for 6 hours. This case provides new ideas and methods for the manufacture of lithium-ion batteries and expands the application scenarios of lithium batteries.
### Using viruses to make lithium-ion batteries
- **Case background**: Researchers at MIT have been exploring more environmentally friendly and cheaper battery manufacturing methods to meet the battery needs of automobiles and electronic products.
- **Specific practices**: Researchers have developed a genetically modified virus that can make batteries. First, the virus is used to make the positive electrode of the lithium-ion battery, which is composed of nanowires composed of cobalt oxide and gold materials. Later, the virus was successfully used to make the negative electrode of the lithium-ion battery by coating the surface of the virus with a layer of iron phosphate and using carbon nanotubes to create a network of highly conductive materials.
- **Achievements and inspiration**: The battery made in this way has better conductivity and lighter weight, which opens up new possibilities for automobile and electronics manufacturers to use batteries and demonstrates the innovative application of biotechnology in the field of lithium batteries.
