Recently,　great　efforts　have　been　devoted　to　designing　and　fabricating　flexible,　lightweight,　wearable,　and　miniaturized　supercapacitors.　At　the　same　time,　the　exploration　of　green,　renewable,　and　biocompatible　energy-storage　materials　has　been　attracting　intensive　attention.　By　taking　fabrication　and　configuration　design　into　consideration,　the　naturally　derivable　juglone　molecule　was　exploited　as　an　active　charge-storage　material,　and　integrated　into　flexible　and　micro-supercapacitor　devices.　The　polypyrrole/juglone-composite-based　supercapacitors　exhibit　significant　energy-storage　capabilities　with　high　specific　capacitance　and　long　cyclability,　which　are　comparable　to　that　of　conventional　electrode　materials.　This　study　presents　a　new　way　for　developing　flexible,　lightweight,　portable,　and/or　wearable　electronic　devices　with　biocompatible　and　environmentally　friendly　attributes.