Gao Chang, Huang Jiancheng, Xiao Yukun, Zhang Guoqiang, Dai Chunlong, Li Zengling, Zhao Yang, Jiang Lan, Qu Liangti
Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, PR China.
School of Microelectronics, Tianjin University, Tianjin, PR China.
Nat Commun. 2021 May 11;12(1):2647. doi: 10.1038/s41467-021-22912-8.
Microdevice integrating energy storage with wireless charging could create opportunities for electronics design, such as moveable charging. Herein, we report seamlessly integrated wireless charging micro-supercapacitors by taking advantage of a designed highly consistent material system that both wireless coils and electrodes are of the graphite paper. The transferring power efficiency of the wireless charging is 52.8%. Benefitting from unique circuit structure, the intact device displays low resistance and excellent voltage tolerability with a capacitance of 454.1 mF cm, superior to state-of-the-art conventional planar micro-supercapacitors. Besides, a record high energy density of 463.1 μWh cm exceeds the existing metal ion hybrid micro-supercapacitors and even commercial thin film battery (350 μWh cm). After charging for 6 min, the integrated device reaches up to a power output of 45.9 mW, which can drive an electrical toy car immediately. This work brings an insight for contactless micro-electronics and flexible micro-robotics.
集成能量存储与无线充电功能的微型设备可为电子设计创造机会，例如移动充电。在此，我们利用一种设计的高度一致的材料系统报告了无缝集成的无线充电微型超级电容器，该系统中无线线圈和电极均由石墨纸制成。无线充电的传输功率效率为52.8%。受益于独特的电路结构，完整的器件显示出低电阻和出色的耐压性，电容为454.1 mF/cm²，优于现有最先进的传统平面微型超级电容器。此外，创纪录的463.1 μWh/cm²的高能量密度超过了现有的金属离子混合微型超级电容器，甚至超过了商用薄膜电池（350 μWh/cm²）。充电6分钟后，集成器件的功率输出可达45.9 mW，可立即驱动电动玩具车。这项工作为非接触式微电子学和柔性微型机器人技术带来了启示。
