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 2575 mF/cm² at a current density of 3 mA/cm² and cyclic durability of 85.1% retention after 6000 cycles and a specific capacitance of 615.7 F/g at a current density of 1 A/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.

对超级电容器和锂离子电池等高性能储能设备的需求促使人们设计和开发新的电极材料。在这项工作中，通过无模板和无表面活性剂的水热法制备了作为电极材料的WO ₃纳米管束。作为超级电容器的阳极材料，WO ₃纳米管束在电流密度为3 mA / cm ^2时具有2575 mF / cm ²的面积电容。在6000次循环后保持85.1％的循环耐久性，在1 A / g的电流密度下的比电容为615.7 F / g。所制造的不对称超级电容器在10,000次循环后具有很高的能量密度和循环能力。合成后的产品也可用作无粘结剂的锂离子电池阳极，在首次放电时显示出高放电容量，在200次循环后显示出稳定的容量。所合成的用于超级电容器和锂离子电池的WO ₃产品的出色电化学性能可归因于其独特的管状结构。