The electrified blade adds "electric" damage to the sword, though this is in fact energy damage.
Weapon modifications will modify an existing weapon, and any modifications previously equipped on the weapon will be destroyed, not unequipped. Loose mods cannot be crafted.
Learned from plan/recipe
Plan: Chinese officer sword electrified blade
Electrified blade (1)
Crafted at a weapons workbench.
A loose mod exists in the game files, but cannot be found in-game.