Zhou Yuanyuan, Lee Ilbok, Kim Daeun, Han Seunghee, Kim Jae-Kwang, Lee Donghyun, Ko Song Won, Pyo Sung Gyu, Son Hyungbin, Yoon Songhun
J Nanosci Nanotechnol. 2017 Jan;17(1):389-97. doi: 10.1166/jnn.2017.12474.
Using a stabilizing agent-assisted co-assembly method, a novel nanocomposite of mesoporous carbon embedded with uniform tungsten oxide nanorods is obtained, which is converted into carbon-sheathed tungsten oxide nanoparticles by delicate calcination and further reduction. Through optimization of tungsten content, it is found that highly crystalline tungsten oxide nanoparticles are uniformly coated with an ultra-thin carbon layer. When applied into electrochemical charge-storage electrodes for supercapacitor and lithium-ion battery, an excellent average capacitance (129 F g−1, above 400 F cm−3), higher rate performance and significantly advanced cycle stability are observed. These improved charge storage properties are attributed to improved electrical conductivity and enhanced structural stability, which is induced by uniform carbon coating on partially reduced tungsten oxide nanoparticles.
采用稳定剂辅助共组装法，制备了一种新型的介孔碳负载均匀氧化钨纳米棒的纳米复合材料，通过精细煅烧和进一步还原将其转化为碳包覆氧化钨纳米颗粒。通过优化钨含量，发现高度结晶的氧化钨纳米颗粒均匀地包覆有超薄碳层。当应用于超级电容器和锂离子电池的电化学电荷存储电极时，观察到优异的平均电容（129 F g−1，高于400 F cm−3）、更高的倍率性能和显著提高的循环稳定性。这些改善的电荷存储性能归因于电导率的提高和结构稳定性的增强，这是由部分还原的氧化钨纳米颗粒上均匀的碳包覆所诱导的。
