The invention relates to a micro-
energy system with a
high weight ratio
energy density, a method and application. The invention is characterized that the construction of the
system comprising the following steps of: (1)
sputtering and growing an Al film on the back surface of a GaAs battery; (2)
sputtering and depositing nitrogenized Ni-Co on the surface of Al film, wherein the general formula is ComNi1-mN, and m is more than 0 and less than 1; (3)
sputtering and depositing a Li1.3Ti1.7Al0.3(PO4)3 film on the surface of the nitrogenized Ni-Co film; (4) depositing a
metal Li film on the Li1.3Ti1.7Al0.3(PO4)3 film; (5) sputtering a layer of Cu film on the surface of the Li film; and (6) during sputtering of the steps (2)-(5), firmly attaching a stainless steel
mask plate to the Al surface of an uncovered multi-layer film on the surface of the Al film, arranging an
energy management circuit and an RF (Radio-Frequency) transceiving module in sequence, and connecting the
anode of the GaAs battery, the
anode of the Li battery, the output end of the
energy management module and the output end of the RF transceiving module with a
metal wire. According to the invention, the
high weight ratio
energy density can be up to 438wh / kg, the
system can work for 5 days continuously on cloudy days, and a technical measure is provided for long-time power supply and field application of the node
miniaturization of
the Internet of things.