Improving the High Temperature Performance of Li-Ion Batteries with Transition Metal Ion Trapping Separators - a Brief Review

One of the main performance degradation mechanisms in Li-ion batteries is initiated by the dissolution of transition metal (particularly manganese) cations from positive electrode active materials. These ions will electro-migrate to and deposit on the negative electrode surface. The deposited manganese species induce the catalytic decomposition of solvent molecules and the concurrent depletion of electrochemically active lithium, leading …