3 years ago

Flexible electrode materials based on WO3 nanotube bundles for high performance energy storage devices

Flexible electrode materials based on WO3 nanotube bundles for high performance energy storage devices
The demand for high performance energy storage devices such as supercapacitors and lithium-ion batteries has prompted people to design and develop new electrode materials. In this work, WO3 nanotube bundles as the electrode materials are prepared by a template- and surfactant-free hydrothermal process. As anode materials for supercapacitor, WO3 nanotube bundles possess an area capacitance of 2575mF/cm2 at a current density of 3mA/cm2 and cyclic durability of 85.1% retention after 6000 cycles and a specific capacitance of 615.7F/g at a current density of 1A/g. The as-fabricated asymmetric supercapacitor presents a high energy density and cycle abilities after 10,000 cycles. The as-synthesized products are also applied as binder-free Li-ion batteries anode, revealing high discharge capacity at the first discharge and a stable capacity after 200 cycles. Excellent electrochemical performance of the as-synthesized WO3 products for supercapacitors and lithium ion batteries could be ascribed to their unique tube-like structures.

Publisher URL: www.sciencedirect.com/science

DOI: S2211285517306638

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