A graphene nanosheet composite, a method for preparing same, and an electrode comprising same. The graphene nanosheet composite comprises at least one of a functional substrate (1), a graphene nanosheet material (2) attached to the functional substrate, nano-micro particles (3) attached to the graphene nanosheet material (2), a nano-micro wire (4), and a first nano-micro film (5). The functional substrate is nano-micro sized in at least one dimension. The graphene nanosheet composite can maintain a stable structure.
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