Fu Xiu-Yan, Chen Zhao-Di, Zhang Yong-Lai, Han Dong-Dong, Ma Jia-Nan, Wang Wei, Zhang Zi-Rui, Xia Hong, Sun Hong-Bo
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China.
Nanoscale. 2019 May 9;11(18):9133-9140. doi: 10.1039/c9nr02530h.
The research interest in wearable electronics has continuously stimulated the development of flexible energy storage systems with high performance and robustness. However, open problems with respect to energy storage efficiency and device integration are still challenging. Here, we demonstrate the laser fabrication of flexible planar supercapacitors based on graphene oxide (GO) and black phosphorus quantum dot (BPQD) nanocomposites. By combining graphene and BPQDs, the resultant supercapacitors feature high conductivity and activity, demonstrating enhanced specific capacity and superior rate performance, compared to those based on reduced GO (RGO) alone. Furthermore, the as-obtained devices present outstanding flexibility. Their performance shows unobvious degradation after repeated cycles of bending and straightening. Additionally, with the help of direct laser writing (DLW) technology, integration of the supercapacitors has been achieved without the need for any metal interconnection. The integrated devices delivered reasonable performance uniformity with a voltage extension of 3 V, which could easily power a LED. The supercapacitor-based RGO and BPQD nanocomposites demonstrate great potential for practical applications in flexible and wearable electronics.
对可穿戴电子产品的研究兴趣不断推动着高性能且坚固耐用的柔性储能系统的发展。然而，在储能效率和器件集成方面的开放性问题仍然具有挑战性。在此，我们展示了基于氧化石墨烯（GO）和黑磷量子点（BPQD）纳米复合材料的柔性平面超级电容器的激光制造。通过将石墨烯和BPQDs相结合，所得超级电容器具有高导电性和活性，与仅基于还原氧化石墨烯（RGO）的超级电容器相比，展现出更高的比容量和优异的倍率性能。此外，所制备的器件具有出色的柔韧性。在反复弯曲和伸直循环后，其性能没有明显下降。此外，借助直接激光写入（DLW）技术，无需任何金属互连即可实现超级电容器的集成。集成器件在3 V的电压扩展下表现出合理的性能均匀性，能够轻松为一个发光二极管供电。基于RGO和BPQD纳米复合材料的超级电容器在柔性和可穿戴电子产品的实际应用中显示出巨大潜力。
