A team of researchers at Stanford University has developed a transparent lithium-ion battery that could lead to truly transparent working gadgets in the very near future. The battery isn’t actually invisible; rather, it is made up of an incredibly fine mesh of electrodes a mere 35 microns wide. That’s thin enough to appear invisible to the human eye. Currently the transparent battery doesn’t have a huge capacity; it can only hold about half as much power as a traditional lithium-ion battery. The capacity should increase as the research continues, but the battery already has the advantages of being flexible and inexpensive.
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