Chemical bath deposition of SnS_2 nanowall arrays with improved electrochemical performance for lithium ion battery

摘要

A facile chemical bath deposition (CBD) approach has been developed to fabricating SnS_2 nanowall (NW) arrays directly on copper foils. As an anode material for lithium ion battery, the NW arrays exhibit enhanced lithium ion storage property. At a rate of 0.3 C, the NW arrays maintain a capacity of about 700 mA h g~(-1) after 40 cycles. Even at a high rate of 1.2 C, the NW arrays can still deliver a stable capacity of 400 mA h g~(-1). The high electrochemical performance is well related to the in situ growth of uniform SnS_2 nanostructures on a conductive copper current collector, which results in a robust adhesion for the SnS_2 NW on the copper, and leads to an enhanced electron conductivity, improved lithium ion transport, and sustained volume variations.