 Cellulose-based triboelectric materials have been gaining popularity due to their high efficiency, biodegradability, and customizability. These materials can be used as a source of energy when they are subjected to mechanical stress or friction. Dielectric modulation is a technique that can be used to improve the performance of these materials by increasing their surface charge density. This review provides an overview of the fabrication of dielectric-modulated cellulosic triboelectric materials, their effects on the charge density, and their application in wearable electronics and impedance matching. This article was authored by Guoli Du, Jin Long Wang, Yin Hua Lu, and others.