Search

Keywords: 3D printing; MXene; stretchable micro-supercapacitor; thick electrode; wearable electronics EN 3D printing MXene stretchable micro-supercapacitor thick electrode wearable electronics 1 1 1 04/16/20 20200414 NES 200414 In article number 1903794, Jiajie Liang and co-workers present a strategy for the 3D-printing and unidirectional freezing of a nanocomposite gel composed of MXene, MnO SB 2 sb nanowires (NWs), AgNWs, and C60 to construct intrinsically stretchable micro-supercapacitors (MSCs) with thick and honeycomb-like porous interdigitated electrodes. The 3D-printed MSC exhibits high areal capacitance of 216.2 mF cm SP -2 sp at 10 mV s SP -1 sp , and remains stable when stretched up to 50%. 3D printing, MXene, stretchable micro-supercapacitor, thick electrode, wearable electronics. [Extracted from the article]

• 3D porous and highly conductive thick electrodes were designed by 3D printing. • 3D-printed thick electrodes were constructed by using nanocomponents-based hybrid ink. • 3D-printed electrodes show both high areal capacity and rate performance. • This strategy represents a simple process for the preparation of thick electrodes. The development of robust performing lithium-ion batteries (LIBs) with high areal capacity is a challenge that persists to date. One commonly used strategy to increase areal capacity is increasing the thickness of the battery electrodes. However, the practical application of these thick electrodes is hindered thanks to the fundamental issues of incomplete electrolyte infiltration, poor mechanical properties, and slow charge and ion transport. Herein, a new method is presented wherein a thick electrode is constructed by 3D printing a highly-conductive and hierarchical network of silver nanowires (AgNWs), graphene and Li 4 Ti 5 O 12 together as a mixed functional ink. The amalgamation of highly conductive AgNW network, interconnected 3D graphene scaffold, and hierarchical porous structure can allow the 3D-printed electrode to demonstrate much improved charge and ion transport, and to alleviate internal stresses during the charging and discharging process even under ultrahigh thickness state. As a result, the LIBs utilizing these thick electrodes have a rate capability of 121 mAh g−1 at 10C, high areal capacities up to 4.74 mAh cm−2, and stable cycling performance (capacity retention of ~95.5% after 100 cycles). These performance metrics provide a route for a new design strategy using thick electrodes for high-performance energy storage devices. [ABSTRACT FROM AUTHOR]