School of Electrical & Computer Engineering , Purdue University , West Lafayette , Indiana 47907 , United States.
ACS Appl Mater Interfaces. 2018 May 16;10(19):16490-16499. doi: 10.1021/acsami.8b02721. Epub 2018 May 2.
An ultrahigh-capacity, flexible electrode made with vanadium pentoxide/graphene (with a specific capacity of 396 mAh/g) supported on paper-based current collectors has been developed. The ultrahigh-capacity graphene-modified vanadium pentoxide is fabricated by incorporating graphene sheets (2 wt %) into the vanadium pentoxide nanorods to improve the specific capacity, cycle life, and rate capability. This active material is then incorporated with the paper-based current collectors [carbon nanotube (CNT)-microfiber paper] to provide flexible electrodes. The flexible current collector has been made by depositing single-wall CNTs over wood microfibers through a layer-by-layer self-assembly process. The CNT mass loading of the fabricated current collectors is limited to 10.1 μg/cm. The developed electrodes can be used to construct the flexible battery cells, providing a high-capacity/energy and rechargeable energy storage unit for flexible electronic devices.
已开发出一种超高容量、柔性电极，其由负载在纸质集流器上的五氧化二钒/石墨烯（比容量为 396 mAh/g）制成。超高容量石墨烯改性五氧化二钒是通过将石墨烯片（2wt%）掺入五氧化二钒纳米棒中制备的，以提高比容量、循环寿命和倍率性能。然后将这种活性材料与纸质集流器[碳纳米管（CNT）-微纤维纸]结合，提供柔性电极。柔性集流器是通过层层自组装工艺在木纤维上沉积单壁 CNT 制成的。所制备的集流器的 CNT 质量负载量限制在 10.1μg/cm。所开发的电极可用于构建柔性电池单元，为柔性电子设备提供高容量/能量和可再充电储能单元。
