The Internet of Things, one of the most exciting and fastest expanding future technologies, stands poised to revolutionise how we interact with the world around us. Also known as the IoT, it represents a system of interrelated devices, machines, objects and more, able to seamlessly transmit data over a network without inter-human or human-computer interaction. Applicable to a wide range of fields including industry, organisations and consumers, 27 billion IoT devices worth some €2 trillion are expected to be installed by 2025. But while this technology has tremendous future potential, it also highlights a need for compact, low-cost, lightweight and ecologically friendly energy sources.