Dalhousie University: Dal researchers’ chance discovery could help extend battery life by replacing tape that causes self‑discharge. ‘”In commercial battery cells there is tape — like Scotch tape — that holds the electrodes together and there is a chemical decomposition of this tape, which creates a molecule that leads to the self-discharge,” says Michael Metzger, an assistant professor and the Herzberg-Dahn chair and in the Department of Physics and Atmospheric Science.’