In summary, Prof John Goodenough was an American materials scientist and physicist, best known for inventing the lithium-ion battery in 1980. He passed away on August 25, 2021, at the age of 99, while still actively working at the University of Texas at Austin. His most significant contribution to science was the lithium-ion battery, which has revolutionized portable electronic devices and renewable energy storage. His invention has had a profound impact on the world, and his legacy is one of groundbreaking scientific contributions and dedication to his field.