Porous organic frameworks (POFs) with high surface area, permanent nano-/mesosized pores, and superior physiochemical stability have garnered extensive research interests in the past decade. In particular, π-conjugated POFs are interesting because of their tailorable redox properties that can be adapted as a platform for electrochemical energy storage. However, the use of POFs in energy storage has been rare. Here, we demonstrate the use of a redox-active, aza-based π-conjugated porous organic framework, Naph-aza-POF-1, as an efficient cathode material in Na-ion battery. The electrochemical properties of the Naph-aza-POF-1 were characterized in Na half cells. The Naph-aza-POF-1 exhibits a reversible capacity ～ 215 mAh/g between 1 -4 V at a current density of 10 mA/g.
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