| CPC C01B 32/194 (2017.08) [B81B 3/00 (2013.01); C23C 14/185 (2013.01); C23C 14/35 (2013.01); H02N 11/002 (2013.01); C01P 2004/03 (2013.01)] | 10 Claims |

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1. An energy harvesting and self-cleaning system based on graphene aerogels, comprising:
a freeze-dried graphene aerogel; and
a layer of a metal collector that is sputtered directly on both sides of the same freeze-dried graphene aerogel by magnetron sputtering;
wherein the freeze-dried graphene aerogel with the metal collector is fixed on a side and a bottom of a substrate in series and/or parallel connection, and then is put into an electrolyte to get a target system.
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