Macroporous defective tungsten oxide nanostructure electrodes deliver ultrahigh capacitance and remarkable long cyclic durability in LiCl electrolyte

作者：Yang, Min; Li, Lin; Ma, Li; Wei, Bohui; Yao, Chenzhong^*; Li, Jun

来源：Ceramics International, 2018, 44(18): 22718-22724.

DOI：10.1016/j.ceramint.2018.09.054

• Tungsten oxide
• Electroreduction strategy
• Oxygen deficiencies
• Electrochemical behavior
• Cycling durability

Tungsten oxide (WO3) has been considered as an fascinating candidate for supercapacitors (SCs) material because of its desirable physico-chemical properties and electrochemical behaviors. Nevertheless, it is still a significant challenge to enhance its electrochemical properties and stability. Herein, we report an electroreduction strategy to fabricate the macroporous defective tungsten oxide nanostructure (ER-WO3) as a negative electrode material with outstanding electrochemical behavior and remarkable cycling durability in 5 M LiCl aqueous electrolyte, which attributes to the introduction of oxygen deficiencies. The ER-WO3 electrode exhibits a large areal capacitance of 244.7 mF cm(-2) and an ultrahigh gravimetric specific capacitance of 266.6 F g(-1) at scan rate of 50 mV s(-1). More importantly, the ER-WO3 product also delivers an ultralong cyclic stability with 97.4% capacitance retention after 5000 cycles. Such these optimized properties of the ER-WO3 nanostructure electrode will promote its applications in the field of science and technology.

• 出版日期2018-12-15
• 单位山西师范大学; 运城学院