Abstract
Microrobots Batteries are a convenient source of energy for untethered miniature robots. However, the low specific energy of small-scale batteries sets limits on how long such a robot can operate. Yang et al. report an insect-scale robot called RoBeetle that is powered by the controlled catalytic combustion of methanol, a fuel with more than 10 times the specific energy of a small-scale battery. RoBeetle, with size and mass comparable to a small insect, can carry payloads of up to 2.6 times its body weight, crawl on rough surfaces, and ascend inclines of 15 degrees. Sci. Robot. 5 , eaba0015 (2020).
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