Triboelectrification, a phenomenon where materials become electrically charged through friction, has been quantified for a wide range of polymers using a standardized method. This method involves measuring the triboelectric charge density (TECD) of materials in contact with liquid mercury, which is shape-adaptable and ensures ideal surface contact. The measurements are conducted under controlled conditions in a glove box to minimize environmental influences. The normalized TECD values reveal the intrinsic properties of materials, such as their tendency to gain or lose electrons. This standardized triboelectric series can serve as a fundamental reference for applications in energy harvesting, self-powered sensing, and flexible electronics. The study addresses the limitations of existing methods, which often suffer from variations in contact pressure, surface roughness, and environmental conditions, leading to inconsistent results. By providing a quantitative and consistent framework, this work aims to advance the field of triboelectrification and support the Materials Genome Initiative.Triboelectrification, a phenomenon where materials become electrically charged through friction, has been quantified for a wide range of polymers using a standardized method. This method involves measuring the triboelectric charge density (TECD) of materials in contact with liquid mercury, which is shape-adaptable and ensures ideal surface contact. The measurements are conducted under controlled conditions in a glove box to minimize environmental influences. The normalized TECD values reveal the intrinsic properties of materials, such as their tendency to gain or lose electrons. This standardized triboelectric series can serve as a fundamental reference for applications in energy harvesting, self-powered sensing, and flexible electronics. The study addresses the limitations of existing methods, which often suffer from variations in contact pressure, surface roughness, and environmental conditions, leading to inconsistent results. By providing a quantitative and consistent framework, this work aims to advance the field of triboelectrification and support the Materials Genome Initiative.