Abstract
The era of Internet of Things has been driving the rapid development of multifunctional devices featuring the seamless integration of modules of energy, sensing, actuation, displays, etc., towards miniaturized devices and smart applications in fields as diverse as robotics, medicine, and space exploration.However, challenges such as incompatibilities between different functioning subunits, which inevitably cause compromised performance, distant or wire connections that lead to a poor level of integration and power loss, etc., demand immediate solutions.Moreover, core to any electronic applications, future power sources require new strategies to realize the combination of high energy density, security, ultralight weight, and small size.This special issue is a collection of 12 research articles and 11 review articles, contributed by renowned researchers in the field of multifunctional energy-integrated devices.The articles can be sorted into three themes: 1) advanced energy storage devices, including batteries and supercapacitors; 2) energy harvesting devices, including photovoltaic cells, thermoelectric devices, and triboelectric nanogenerators; 3) multifunctional devices that integrate energy harvesting and storage for optoelectronic and biological sensory systems.The topics covered in this special