The synthesis of nanoscale Cuprous Chloride(CuCl)(WSDTY) cubic structure by a facile hydrothermal route.A possible mechanism for the growth of those nanostructures is proposed based on the experimental results. There is still a good reversibility with cycling efficiency of 88.8 % after 2,000 cycles, demonstrating its excellent long-term cycling stability and might be the promising candidates as the excellent electrode material.

In the last decade, supercapacitor technology has undergone an increasing development owing to the discovery of new electrode materials, especially metal oxide nanomaterials, and the design of new hierarchical nanostructures. For example, Wu et al. synthesized hierarchical SnO2 nanostructures assembled by many ultrathin nanosheets. They thought that their excellent supercapacitor performances could be ascribed to their unique morphology and the fast ion and electron transfer characteristics . Gu et al. prepared WO3 nanowires and investigated their electrochemical performances. Mai’s group reported ultra-long hierarchical vanadium oxide nanowires by electrospinning, which exhibit much higher capacity in lithium ion batteries. However, most studies are currently focused on metal oxide and graphene composite materials.

Cuprous Chloride is an I-VII semiconductor with a direct band gap of ~3.4 eV. It has a large exciton binding energy (~190 meV), which suggests the possibility of the fabrication of exciton-based blue/UV optoelectronic devices. CuCl is widely used as a catalyst in organic synthetic industry. In this paper, for the first time, we prepared CuCl nanocubes by a facile hydrothermal route. The prepared CuCl products were used for the fabrication of the supercapacitor, and the results demonstrating the prepared nanomaterials represent the outstanding rate capability and high reversibility with little capacitance loss.