IEIs 2.1

Add an extended CITATION.cff file.

Release 2.0

As new database (v2021.05.13) of Materials Project released, formation energies of materials have obvious changes, especially on oxygen compounds, diatomic gases, and transition metal oxides and fluorides, as they claimed, and many new materials were introduced as well. There should be new phases having a tieline with Li_BCC/Na_BCC/K_BCC in up-to-date phase diagrams, so I tuned codes to make it compatible with pymatgen v2022, then updated the screening lists, including the list of phases that have thermodynamically stability against Li_BCC/Na_BCC/K_BCC and lists of LEI/NEI/KEI candidates.

Release 1.0

The release for the paper to be submitted -- "Electrochemically Stable Lithium-ion and Electron Insulators (LEIs) for Solid-State Batteries".