▎ 摘　　要

NOVELTY - Graphene aerogel-based energy collection and self-cleaning system comprises a layer of metal collector, sputtered on both sides of the freeze-dried graphene aerogel by magnetron sputtering. The prepared graphene aerogel with the collector electrode is fixed on the side surface and the bottom surface of the substrate in a serial and/or parallel manner, and then placed in an electrolyte to obtain a target system. USE - The graphene aerogel-based energy collection and self-cleaning system is useful in the field of mechanical energy harvesting. ADVANTAGE - The system: adsorbs impurities e.g. oil pollutants from the ocean, and thus has ocean cleaning effect; can produce an open-circuit voltage of 220 mV and a power density of 2 W/kg in sodium chloride solution or organic electrolyte solution. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the graphene aerogel, comprising (i) dispersing graphene oxide in ultrapure water using ultrasonic technology to obtain graphene oxide aqueous solution, (ii) performing ultrasonic mixing of graphene oxide aqueous solution and nano composite material solution, adding a reducing agent and mixing to obtain a mixed solution, (iii) heating and insulating the prepared mixed solution in a high-pressure reaction kettle; and (iv) subjecting the mixed solution to low-temperature freezing and freeze-drying. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the parallel manner of the energy collection and self-cleaning system based on graphene aerogel.