Complex sentence: Another Italian scientist, Alessandro Volta, disagreed with some of Galvani's ideas, and this scientific argument motivated Volta to develop the first frog-free galvanic cell, and led directly to the invention of the first practical electric battery, the voltaic pile.
Split into simpler sentences: Another Italian scientist, Alessandro Volta, disagreed with some of Galvani's ideas. This scientific argument motivated Volta to develop the first frog-free galvanic cell, and led directly to the invention of the first practical electric battery, the voltaic pile.