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The conventional strategy of overcharge protection for lithium ion batteries uses redox molecules having oxidation potential higher than the cathodic materials in the electrolyte. Here we propose a novel approach by using redox molecules having reduction potentials lower than the anodic materials. This new approach is successfully demonstrated in TiO2/LiCoO2 and TiO2/LiFePO4 cells by using benzophenone molecule. (C) 2007 Published by Elsevier B.V.
Xile Hu, Wenchao Ma, Ariana Serban, Yiwei Zheng, Andrit Allushi