Construction of mesoporous Cu-doped Co₉S₈ rectangular nanotube arrays for high energy density all-solid-state asymmetric supercapacitors

Abstract

A self-templating strategy was used to prepare novel mesoporous Cu-doped Co₉S₈ rectangular nanotube arrays (Cu-Co₉S₈ NTAs) as an advanced electrode for all-solid-state asymmetric supercapacitors, which deliver a high energy density of 71.93 W h kg⁻¹ at a power density of 750 W kg⁻¹.