Integrated pressure and torsion sensor with porous graphene aerogel electrodes embedded by conductive CuCo-MOFs

With rod-like conductive CuCo-MOF embedded into three-dimensional porous graphene aerogel, a facial sense electrode is developed and applied in integrated pressure and torsion sensing application. In the composite aerogel, the embedded MOF nanorods expand interlayer spacing and form C-C bonding networks with graphene sheets, creating optimized electron transport channels while redistributing internal defects. With efficient carrier transport pathways in the porous electrode materials, the charge transfer resistance and series resistance are both reduced, which can be attributed to the unique defect-engineering strategy. The optimized electrode achieves a specific capacitance of 290 F g^-1 at 0.25 A g^-1. Then, the device presents high pressure sensitivity of 0.351 kPa^-1 in 0-6 kPa range and 0.511 kPa^-1 in 6-14 kPa range, fast response time of 200 ms, robust stability with 97.1% retention even after 26,000 s. Further, the device presents high torsional sensitivity of 0.094 N mm^-1 with fast response time of 200 ms. These have been successfully demonstrated by various human motion monitoring, illustrating promising prospects in wearable electronics and human-machine interfaces.