DFT study of nano zinc/copper voltaic cells

Area of Science:

• Computational Chemistry
• Materials Science
• Electrochemistry

Background:

• Developing novel battery materials requires accurate computational modeling.
• Ab initio full-electron computational techniques are essential for predicting material properties.

Purpose of the Study:

• To evaluate density functional theory (DFT) procedures for modeling battery materials.
• To determine the accuracy of DFT methods for calculating the energetics of a zinc/copper voltaic cell.

Main Methods:

• Testing DFT procedures including B3PW91 with different basis sets (6-31G(d) and cc-pVTZ).
• Calculating zero-point energy, dispersion, and counterpoise corrections.
• Comparing computational results with macroscopic experimental values.

Main Results:

• Dispersion and zero-point energy corrections were found to be in the range of 0.01-0.6 kcal/mol per atom/molecule.
• Counterpoise correction significantly impacted results at the B3PW91/6-31G(d) level but minimally at B3PW91/cc-pVTZ.
• B3PW91/cc-pVTZ showed smaller deviations (0.1-4.8 kcal/mol) from experimental values compared to B3PW91/6-31G(d) (0.1-7.1 kcal/mol).

Conclusions:

• The B3PW91/cc-pVTZ level of theory provides more accurate energetics for zinc/copper voltaic cells.
• The choice of basis set significantly influences the accuracy of DFT calculations for battery materials.
• Accurate computational techniques are crucial for advancing battery material discovery.