Hou Jing-Feng, Gao Jian-Fei, Kong Ling-Bin
State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou, 730050, P. R. China.
School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, P. R. China.
Chem Asian J. 2021 Dec 13;16(24):4130-4136. doi: 10.1002/asia.202101048. Epub 2021 Oct 26.
Here, we report a two-phase crystalline NiWO /amorphous Co-B nanocomposite as an electrode material for supercapacitors, which is effectively synthesized via a simple hydrothermal method and chemical precipitation method. The obtained NiWO /Co-B exhibits crystal-amorphous contact, which makes it have more active sites than other crystalline-crystalline phase boundaries, thereby enhancing electron transport. The NiWO /Co-B electrode with the best mass ratio of crystalline and amorphous exhibits a great specific capacitance and excellent cycle durability. Compared to individual Co-B and NiWO , it also shows enhanced rate capability Besides, NiWO /Co-B/activated carbon supercapacitor device can provide a good specific capacitance and a maximum energy density of 10.92 Wh kg at 200 W kg . This work provides new insights to develop novel electrode materials for energy storage and conversion.
在此，我们报道了一种两相晶体NiWO₄/非晶态Co-B纳米复合材料作为超级电容器的电极材料，它通过简单的水热法和化学沉淀法有效合成。所获得的NiWO₄/Co-B呈现晶体-非晶接触，这使其比其他晶体-晶体相界具有更多的活性位点，从而增强了电子传输。具有最佳晶体与非晶质量比的NiWO₄/Co-B电极表现出极大的比电容和出色的循环耐久性。与单独的Co-B和NiWO₄相比，它还显示出增强的倍率性能。此外，NiWO₄/Co-B/活性炭超级电容器装置在200 W kg⁻¹时可提供良好的比电容和10.92 Wh kg⁻¹的最大能量密度。这项工作为开发用于能量存储和转换的新型电极材料提供了新的见解。
