X. Wang, J.Q. Qin, Q. Hu, P. Das, P.C. Wen, S.H. Zheng, F. Zhou, L. Feng,* and Z.-S. Wu*
Small, 2022, 18, 2200678.
DOI: 10.1002/smll.202200678 [PDF]
The prosperity in smart portable microdevices urgently requires advanced integratedmicrosystem equipped with cost-effective safe microbatteries and ultra-stable sensitive sensors. However, practical application of smart microdevices is limited by complex active materialswith single function. Here, we develop the two-dimensional (2D) mesoporous nanosheets of polyaniline decorated on graphene with large specific surface area of141 m2/g, ample active sites, comparable conductivity and ordered mesopores of 18 nm for new-type co-planar integrated microsystem of zinc ion microbattery and gas sensor. These unique triple-function mesoporous nanosheets are well proved for dendrite-free zinc anode with long cyclability (>500 h) and small overpotential (48 mV), high performance cathode of zinc ion microbattery with outstanding volumetric capacity of 78 mAh cm-3outperforming their counterparts reported, and highly sensitive gas sensor with aresistance response (ΔR/R0%) of 118 % for 20 ppm NH3. Moreover, the co-planar battery-sensor integrated microsystem exhibits superior mechanical stability and smart integration. Therefore, this work will open many opportunities to develop multifunctional 2D mesoporous materials for high performance smart integrated microsystems.
