▎ 摘　　要

Synthesis of graphene at high temperature offers an alternative route for large-scale production on a short time scale. Through the solid-state exothermic reaction of the polytetrafluoroethylene (PTFE)-Al energetic material, single and few-layer graphene having a lateral size in tens of nanometers are produced with an ultralow power consumption due to the self-sustained characteristics of the reaction. The graphene can directly disperse in ethanol to form stable dispersion and by evaluating in half-cell configuration, the graphene exhibits a stable cycling performance over 1000 cycles. The positive correlation between the dimension of the PTFE precursor and graphene demonstrates the feasibility of synthesizing powdered graphene in a controllable manner. (c) 2020 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http:// creativecommons.org/licenses/by-nc-nd/4.0/).