Functional Inks for Printable Energy Storage Applications based on 2 D Materials

Ubiquitous portable electronics and the ever-growing internet-of-things have necessitated the emergence of high-end miniaturized devices as well as associated sophisticated printing technologies. With excellent solution processability and tunable electronic properties, 2 D materials stand as a promising candidate for functional inks that are readily printable for energy-storage devices. In this Review, we outline the significance, status, and challenges that we are facing of the developments of 2 D materials-based functional inks. Then, general ink formulation and basic knowledge of printing techniques together with their rheological requirements and enabled applications in energy storage are introduced, providing guidelines for developing inks that match well with the present printing techniques. Last, but not least, we also propose the perspectives on the development of 2 D materials-based inks for energy-storage applications.