Self-supported Zn3P2 nanowires-assembly bundles grafted on Ti foil as an advanced integrated electrodes for lithium/sodium ion batteries with high performances

摘要

Well-aligned Zn3P2 nanowires-assembly bundles/Ti foil integrated anodes were for the first time successfully synthesized by a facile chemical vapor deposition. When directly applied as anodes for lithium/sodium ion batteries, they show excellent lithium/sodium storage performance especially in high-rate capability. Specifically, applied as anode material for lithium ion batteries, it showed 1100 mA h g(-1) after 100 cycles and an ultrahigh rate performance with 300 mA h g(-1) even at 40 A g(-1); as anode material for sodium ion batteries, it was, for the first time, investigated and delivered a high initial specific capacity of 1120 mA h g(-1), and excellent rate capability with 280 mA h g(-1) at 5 A g(-1), demonstrating that Zn3P2 nanowires-assembly bundles/Ti foil integrated anodes are a promising anode candidate for lithium/sodium ion batteries. The Ex-situ XRD and HRTEM were for the first time, carried out to investigate the sodium storage mechanism of Zn3P2. Such superior lithium/sodium storage performances can be attributed to this well-aligned Zn3P2 nanowires-assembly bundles structure, which not only mitigates the volume expansion of Zn3P2 during cycling but also provides the direct electron transfer to ensure high-rate performances. (C) 2017 Elsevier B.V. All rights reserved.