Characterization Data for Lignin-Derived Carbon Materials

Furthermore, electrochemical energy storage performance tests (including Cyclic Voltammetry (CV), Galvanostatic Charge-Discharge (GCD), and Electrochemical Impedance Spectroscopy (EIS)) were all conducted on standard electrochemical workstations. These tests employed a three-electrode or a symmetric/asymmetric two-electrode system at room temperature under controlled illumination and dark environments, ensuring the stability of the testing conditions and the high fidelity of the data.This dataset consists of test files in various formats, among which the core spectral and electrochemical characterization data have been deeply integrated and saved as Origin project files (including raw data worksheets and graphing windows).

In the Origin data worksheets, the number of records for Raman and XPS spectral data corresponds to each discrete sampling point. The column labels primarily consist of the x-axis (e.g., Raman Shift, unit: cm⁻¹; Binding Energy, unit: eV) and the y-axis (Intensity, unit: a.u.). The electrochemical test data worksheets record in detail the dynamic changes under different testing conditions.

The column labels cover physical quantities such as Time (s), Potential (V), Current (A), and the calculated Specific Capacitance (F/g). The number of records in a single worksheet depends on the specific testing duration and sampling frequency (typically ranging from thousands to tens of thousands of records). The data chain for all tests is complete, with no instances of abnormal missing data.

Considering the instruments' own detection limits and baseline drift, minor systematic background fluctuations may exist in the raw spectral data. However, these have been eliminated through routine standardized processing (such as Shirley background subtraction and peak-fitting calibration for XPS), which does not affect the extraction of the core physical mechanisms.Given that the numerical data in this dataset highly rely on professional graphing and analysis tools, the raw spectral and electrochemical data are packaged in .ojpu formats.

To ensure the accurate reading and secondary analysis of the data, it is strongly recommended that users utilize the Origin professional data analysis software (v2021 or higher) developed by OriginLab Corporation for viewing.