Nano paste extends lithium battery lifetime
Taiwan’s Industrial Technology Research Institute (ITRI, Hsinchu) reports that its “ChemSEI-Linker” paste increases Li-ion batteries’ lifetime up to 70%. ITRI also says ChemSEI-Linker is a green technology because it enables easier recycling of Li-ion cells at the end of their extended lifetimes. ITRI engineered the new paste after analyzing why the electrodes always seem to be the weak link that causes Li-ion batteries to fail in the field. The researchers say they looked at performance degradation, not the failures that result in fires or explosions as those have been traced to dendrites. ChemSEI-Linker is claimed to inhibits that natural accumulation of a solid-electrolyte interface (SEI) layer by depositing its own, nanoscale-thick SEI layer. The deposited SEI repels further buildup during recharging, much as depositing a single monolayer of oxidation on aluminum prevents more from accumulating and thereby makes the aluminum rust-free.