This 00_ReadMe.txt file was generated on Sept. 08, 2026 by Daniela R. Fontecha ------------------- GENERAL INFORMATION ------------------- 1. Title of Dataset: Electrochemical Phase Engineering of Li–Ti–P–O Nanocomposite Thin Films 2. Author Information: drfontec@umd.edu Principal Investigator Contact Information: Name: Keith E. Gregorczyk Institution: University of Maryland Address: 8279 Paint Branch Dr, College Park, MD 20740 Email: kgregorc@umd.edu Associate or Co-investigator Contact Information: Name: Daniela R. Fontecha Institution: University of Maryland Address: 8279 Paint Branch Dr, College Park, MD 20740 Email: drfontec@umd.edu 3. Date of data collection: <20230701> to <20250901> 4. Geographic location of data collection: University of Maryland 5. Information about funding sources that supported the collection of the data: This work was supported by the U.S. Department of Energy Office of Science, Basic Energy Sciences, under Grant DE-SC0021070, encompassing and emphasizing the synthesis of Li containing titanium phosphates with composition and structure varied through a dopant supercycle process and corresponding electrochemical analysis. D.R.F. was supported by the National Science Foundation Graduate Research Fellowship Program under Grant No. DGE 1840340. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation. -------------------------- SHARING/ACCESS INFORMATION -------------------------- Recommended citation for the data: Daniela R. Fontecha, Osma Gomez, Nam Soo Kim, Sang Bok Lee, Gary W. Rubloff, Keith E. Gregorczyk. (2026). "Electrochemical Phase Engineering of Li–Ti–P–O Nanocomposite Thin Films". ACS Applied Energy Materials. 10.1021/acsaem.6c01750 Creative Commons CC BY 3.0 US --------------------- DATA & FILE OVERVIEW --------------------- File Name Description & Nomencature: * Files are organized by figure number as they appear in the publication. All files contain raw data unless otherwise indicated. * XPS = X-Ray Photoelectron Spectroscopy * GI-XRD = Grazing Incidence X-ray Diffractometry * XRR = X-Ray Reflectometry * SEM = Scanning Electron Microscopy * CV = Cyclic Voltammetry * GCPL = Galvanostatic Cyclic Potential Limitation General File Structure: [Figure number]_[technique]_[sample name]_[annealing temp]_[annealing time]_[parameters specific to technique] 1. File List: A. Filename: 1a_Raman_Li-rich_650C_8,5min.txt, 1a_Raman_Li-poor_650C_8,5min.txt, 5a_Raman_Li-poor_650C_8,5min.txt File name structure: [figure # (#-x)]_[technique]_[Li-content (rich/poor)]_[annealing temp]_[annealing time] Short description: Figures 1 and 5 Raman spectra .txt files B. Filename: 1b_GI-XRD_Li-rich_650C_8,5min_critical-angle.txt, 1b_GI-XRD_Li-poor_650C_8,5min_critical-angle.txt, 5b_GI-XRD_Li-poor_650C_8,5min_critical-angle.xy, S2_XRR_Li-rich_650C_8,5min.txt File name structure: [figure # (#-x)]_[technique]_[Li-content (rich/poor)]_[annealing temp]_[annealing time]_[GI-XRD angle] Short description: Figures 1 and 5 GI-XRD and S2 XRR data files C. Filename: 2_CV_Li-poor_650C_8,5min_1,2-3,5V.txt, 3_CV_Li-rich_650C_8,5min_1,2-3,5V.txt, 4a_CV_Li-rich_650C_8,5min_0,25-3,5V.txt, 4c_CV_Li-poor_650C_8,5min_0,5-3,5V.txt File name structure: [figure # (#-#)]_[technique]_[sample name]_[annealing temp]_[annealing time]_[voltage window] Short description: Figures 2, 3, and 4 CV data .txt files D. Filename: 6_GCPL_Li-poor_650C_8,5min_1,6-3,5V_step1_1C.txt, 6_GCPL_Li-poor_650C_8,5min_1,6-3,5V_step2_2C.txt, 6_GCPL_Li-poor_650C_8,5min_1,6-3,5V_step3_4C.txt, 6_GCPL_Li-poor_650C_8,5min_1,6-3,5V_step4_10C.txt, 6_GCPL_Li-poor_650C_8,5min_1,6-3,5V_step5_20C.txt, 6_GCPL_Li-poor_650C_8,5min_1,6-3,5V_step6_1C.txt, 7_GCPL_Li-poor_650C_8,5min_0,5-3,5V_step1_1C.txt, 7_GCPL_Li-poor_650C_8,5min_0,5-3,5V_step2_2C.txt, 7_GCPL_Li-poor_650C_8,5min_0,5-3,5V_step3_4C.txt, 7_GCPL_Li-poor_650C_8,5min_0,5-3,5V_step4_10C.txt, 7_GCPL_Li-poor_650C_8,5min_0,5-3,5V_step5_20C.txt, 7_GCPL_Li-poor_650C_8,5min_0,5-3,5V_step6_1C.txt, S14_GCPL_Li-poor_650C_8,5min_1,6-3,5V_step1_1C.txt, S14_GCPL_Li-poor_650C_8,5min_1,6-3,5V_step2_1C.txt File name structure: [figure # (#-#)]_[technique]_[sample name]_[annealing temp]_[annealing time]_[voltage window]_[step #]_[C-rate] Short description: Figures 6, and 7, and S14 raw GCPL data files E. Filename: 8_GCPL_Li-poor_650C_8,5min_orthorhombic_2,1-3,5V_step1_1C.txt, 8_GCPL_Li-poor_650C_8,5min_orthorhombic_2,1-3,5V_step2_2C.txt, 8_GCPL_Li-poor_650C_8,5min_orthorhombic_2,1-3,5V_step3_4C.txt, 8_GCPL_Li-poor_650C_8,5min_orthorhombic_2,1-3,5V_step4_10C.txt, 8_GCPL_Li-poor_650C_8,5min_orthorhombic_2,1-3,5V_step5_20C.txt, 8_GCPL_Li-poor_650C_8,5min_orthorhombic_2,1-3,5V_step6_50C.txt, 8_GCPL_Li-poor_650C_8,5min_orthorhombic_2,1-3,5V_step7_100C.txt, 8_GCPL_Li-poor_650C_8,5min_orthorhombic_2,1-3,5V_step8_150C.txt, 8_GCPL_Li-poor_650C_8,5min_orthorhombic_2,1-3,5V_step9_200C.txt, 8_GCPL_Li-poor_650C_8,5min_orthorhombic_2,1-3,5V_step10_1C.txt, 8_GCPL_Li-poor_650C_8,5min_amorphous_2,1-3,5V_step1_1C.txt, 8_GCPL_Li-poor_650C_8,5min_amorphous_2,1-3,5V_step2_2C.txt, 8_GCPL_Li-poor_650C_8,5min_amorphous_2,1-3,5V_step3_4C.txt, 8_GCPL_Li-poor_650C_8,5min_amorphous_2,1-3,5V_step4_10C.txt, 8_GCPL_Li-poor_650C_8,5min_amorphous_2,1-3,5V_step5_20C.txt, 8_GCPL_Li-poor_650C_8,5min_amorphous_2,1-3,5V_step6_50C.txt, 8_GCPL_Li-poor_650C_8,5min_amorphous_2,1-3,5V_step7_100C.txt, 8_GCPL_Li-poor_650C_8,5min_amorphous_2,1-3,5V_step8_150C.txt, 8_GCPL_Li-poor_650C_8,5min_amorphous_2,1-3,5V_step9_200C.txt, 8_GCPL_Li-poor_650C_8,5min_amorphous_2,1-3,5V_step10_1C.txt File name structure: [figure # (#-#)]_[technique]_[sample name]_[annealing temp]_[annealing time]_[LTP crystalline state (orthorhombic or amorphous)]_[voltage window]_[step #]_[C-rate] Short description: Figure 8 GCPL raw data for samples with the orthorhombic LTP phase and samples without the orthorhombic LTP phase. F. Filename: S3_XPS_Li-rich_as-deposited.csv, S3_XPS_Li-poor_as-deposited.csv File name structure: [figure # (#-#)]_[technique]_[sample name] file extension: .csv Short description: S3 XPS raw data and fitted data in .csv file. 2. Relationship between files: Files are separated by figure in the final manuscript and technique. Unless otherwise indicated, all files are .txt files. -------------------------- METHODOLOGICAL INFORMATION -------------------------- 1. See pdf of manuscript for methodological details. 2. Instrument- or software-specific information needed to interpret the data: Software used to interpret XRR data: GenX Software used to interpret XPS data: CASA XPS However, both types of data sets are offered in .txt format. ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: [Any XPS high resolution spectra files] ----------------------------------------- 1. Number of variables: Raw data is the binding energy (BE) and counts (CPS) columns. The rest of the columns vary by sample and region name. 3. Variable List A. Name: [BE] Description: [binding energy measured in eV] B. Name: [CPS] Description: [number of counts] B. Name: [region name (i.e., Ti 2p, Li 1s, P 2p, O 1s, or C 1s)] Description: [Counts for individual component in the indicated region from the fit after data analysis in CASA XPS] C. Name: [envelope] Description: [the sum of all of the regions in B]