Amorphous iron phosphate is a useful battery material at the nanometer scale. US scientists used a microscope to scan massive viral DNA and selected M13 virus with a length of 880 nanometers for genetic programming so that the surface can grow as an electrode. Fixed iron phosphate ...
Scientists at the Massachusetts Institute of Technology used viruses to create an environmentally friendly high-power lithium-ion battery, which is expected to be used in portable electronic devices and hybrid vehicles in the future.
Scientists published an article online in Science on April 2 stating that they first genetically programmed the elongated M13 virus to grow amorphous iron phosphate as an electrode on its surface. Amorphous iron phosphate is generally not a good conductor, but it is a useful battery material at the nanometer scale. The ends of these viruses are designed to connect with carbon nanotubes, thereby forming a network structure that can improve the conductivity of the battery.
Scientists used a microscope to scan millions of viral DNAs and selected the M13 virus. The virus is 880 nanometers in length and is a very simple and easy-to-control virus that is harmless to humans.
The researchers found that this genetically modified virus "bonded" to carbon nanotubes can make the charge-discharge rate of the iron phosphate electrode comparable to the most advanced crystalline lithium iron phosphate electrode. This "viral battery" can be charged and discharged at least 100 times without losing capacitance. Although there is still a gap with lithium iron phosphate batteries, the latter is expensive and toxic, and the advantages of "viral batteries" are obvious: it can be at or below room temperature Preparation, no harmful organic solvents are needed, and the substances inside the battery are also non-toxic.
Angela Belcher, who led the research, said that they plan to use materials that can produce higher capacitance and voltage, such as manganese phosphate and nickel phosphate, to develop batteries with better performance, and look forward to the relevant technology can be commercialized as soon as possible. Application phase.
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