In the field of electrochemical energy storage, incorporation of metal oxides into porous carbon has attracted significant attention. Since each advantage of nanoparticles and nanowires of metal oxide has been distinguished for supercapacitor applications, a combination of the advantages of both structures together can meet a capacitive synergy. In this study, WO₃ nanowires and nanoparticles were first incorporated into a carbon aerogel (CA) simultaneously via a facile and one-pot route. A comparative study on the capacitive properties of this novel hybrid structure and single nanoparticles in CA was conducted. The introduction of WO₃ nanowires with diameter <40 nm provided an additional pair of redox peaks and improved the specific capacitance by 50% and the rate capacity by 61%. The composite within the hybrid nanowires and nanoparticles exhibits an excellent cycling stability of only 2% decay in specific capacitance detected at 50 mV s⁻¹ for 1000 cycles. The individual contribution of nanowires and nanoparticles to the enhanced capacitance has been discussed, and the enhanced capacitive properties can be ascribed to the hybrid structure better for charge transport during the electrochemical process. More importantly, this route can be extended to incorporate nanowires of other metal oxides into mesoporous carbon, and enhanced capacitive properties can be expected.

中文翻译：

---

用于超级电容器的碳气凝胶中的 杂化纳米线和WO ₃纳米颗粒†

在电化学能量存储领域中，将金属氧化物掺入多孔碳中已引起广泛关注。由于金属氧化物的纳米颗粒和纳米线的每个优点在超级电容器应用中都已被区分出来，因此两种结构的优点的组合在一起可以满足电容协同作用。在这项研究中，WO ₃纳米线和纳米粒子首先通过一种简便的一锅法同时加入到碳气凝胶（CA）中。对这种新颖的杂化结构和单个纳米粒子在CA中的电容特性进行了比较研究。WO ₃的介绍直径小于40 nm的纳米线提供了一对额外的氧化还原峰，比电容提高了50％，倍率容量提高了61％。杂化纳米线和纳米颗粒中的复合材料表现出出色的循环稳定性，在50 mV s ^-1下检测1000个循环时，其比电容仅下降2％。已经讨论了纳米线和纳米颗粒对增强的电容的单独贡献，并且增强的电容特性可以归因于杂化结构，以便在电化学过程中更好地进行电荷传输。更重要的是，可以扩展该路线以将其他金属氧化物的纳米线结合到中孔碳中，并且可以预期增强的电容性。