High Safety Electrode Additive for Preventing Internal Short Circuit Problem in Lithium Ion Battery

Wednesday, 4 October 2017
Prince George's Exhibit Hall D/E (Gaylord National Resort and Convention Center)
N. H. Yeh and F. M. Wang (National Taiwan University of Science and Technology)
In January 2017, Samsung announced the reason why the Note 7 explodes and losses of more than 5 billion US dollar. According to their explanations, it was caused by the internal short circuit problem in the lithium ion battery. Currently, there is no effectively solution for eliminating the internal short circuit problem owing to the sudden accident.
In this research, a new technology has been developed, which can be used to terminate the thermal runaway and promise the safety performance of lithium ion battery. High voltage layer-type cathode material LLNNO (Li1.2Ni0.2Mn0.6O2) is employed and combined with this safety electrode additive for investigation. In terms of the results, Fig. 1 shows that the electrode additive significantly enhances the cycle performance at 60oC. In addition, the first charge and discharge curve shows in Fig. 2 that the power density is increased by the safety additive, indicating the Li+ diffusion pathway is well established on the electrode’s surface. This electrode additive not only provides high thermal stability on electrochemical reaction, but the columbic efficiency of charge-discharge is also enhanced.