Controllable hollow cube Cu7S4 cathode for aqueous zinc-ion batteries application

Abstract

Hollow structure materials are considered as a promising candidates for energy storage and conversion systems. In this paper, hollow cube shape Cu7S4 nanomaterial was creatively constructed by a simple template method, which was used as high performance cathode material of zinc ion batteries, firstly. The results indicate that the discharge specific up to 335 mAh g−1 at the current density of 0.1 A g−1, which is higher than other materials. Moreover, the prepared Cu7S4 material has super-stable cyclic stability, with a capacity of about 320 mAh g−1 after 100 reversible cycles. The unique hollow cube structure increases the active contact area, reduces the transmission path, and improves the electrochemical performance. The design and synthesis strategies of electrode materials can provide a valuable reference significance for other electrode materials in energy storage applications.