This directory contains raw data (of main figure 1-6 in manuscript) that enables to reproduce the analysis done in: "Beneficial redox activity of halide solid electrolytes empowering high-performance anodes in all-solid-state batteries" by Zhu Cheng, Wenxuan Zhao, Qidi Wang, Chenglong Zhao, Anastasia K. Lavrinenko, Alexandros Vasileiadis, Victor Landgraf, Lars Bannenberg, Yuhang Li, Junwei Liang, Ming Liu, Swapna Ganapathy and Marnix Wagemaker. This directory contains: cyclic voltammetry data, electrochemical cycling data, NMR and XRD data of LYCB-CNF demonstrating the reversible redox behavior of LYCB as presented in Figure 1 in the manuscript; Convex hull calculation and RDF data obtained for LixYCl3Br3 through AIMD simulations as presented in Figure 2 in the manuscript; Evolution of the Li-ion kinetics of LYCB during discharge-charge from EIS and their corresponding DRT analysis demonstrating the improved Li-ion conductivity of LYCB after lithiation as presented in Figure 3 in the manuscript; Electrochemical, EIS, XPS and NMR characterization of the LYCB-based RP anode and LPSC-based RP anode demonstrating the superior compatibility of LYCB over LPSC as presented in Figure 4 in the manuscript; Electrochemical performance of the Li-In|LYCB|RP-LYCB half-cell and the LCO-LYCB and NMC-LYCB|LYCB|RP-LYCB full-cells as presented in Figure 5 in the manuscript; Electrochemical cycling and XRD data of the LZC-CNF mixture demonstrating the generality of the beneficial redox activity in trigonal LZC as presented in Figure 6 in the manuscript.