Battery powered by microbial bacteria
Scientists at the Massachusetts Institute of Technology are developing a new type of bacterial battery that is only half the size of human cells, all powered by microbial bacteria.
Professor Belcher of the Massachusetts Institute of Technology mixed harmless E. coli M13 phage with metallic cobalt onto a stamped silicon film to create a soft miniature battery. This type of battery is suitable for mass production and does not require much capital investment. In theory, this technology can actually transform any surface into an energy storage device for large computers and tiny cancer or heart disease detectors. Professor Belcher said: "The use of stamping technology to make batteries is a very special idea. We can make the battery very small and provide power for various miniature sensors."
At present, Zui's new research results are that by pressing a basic material (such as silicon), the negative M13 phage and the positive metal cobalt can be automatically collected according to their respective electrodes and stamping modes. This means that the battery will be cheaper and the battery will be more efficient. If silicon is used as the base material, it is even possible to produce a soft, bendable battery. This bacterial battery is about twice as powerful as a conventional bio-battery. In addition, the battery is very small and has a diameter of only about 4 Î¼m.
Professor Belcher explained that in nature, this bacterium releases excess electrons into iron-rich sediments, but there are not many deposits in nature, so the electron content in this bacterium is always full. It requires a way to release electrons. If the electrode is placed in this iron-containing deposit and it is connected in a circle, the bacteria can release electricity. Bacterial cells need to be assembled at room temperature, must maintain a relatively neutral pH, and use as little as possible of some of the more troublesome metals, such as lithium or cobalt. In terms of application, Professor Belcher believes that due to the small size of the bacteria battery, it will generally be applied to small-scale electrical equipment, such as chip labs and medical implant equipment.
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