The "jellyroll" production process
One of the micro-batteries being rolled up
One of the new micro-batteries, amongst grains of rice for scale
Jie Xiao with one of her batteries
In order to better understand and protect wild stocks of salmon, it's necessary to track their whereabouts using implanted acoustic tags. Needless to say, the longer that those tags are able to transmit a signal, the greater the amount of data that can be gathered. Scientists at Washington state's Pacific Northwest National Laboratory (PNNL) are helping make that happen, by developing batteries that have both a smaller size and higher energy density than conventional fish tag batteries.
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