Schematic of isotope diffusion imaging (IMAGE) National Institute for Materials Science, Japan Caption SIMS imaging of lithium-ion migration within a solid electrolyte specimen. Grain boundaries resistant to ionic diffusion have created an uneven 6Li distribution. Quantitative analysis found that ionic diffusion across these boundaries was 10,000 times slower than diffusion through the grains. Credit Naoaki Kuwata National Institute for Materials Science Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.