Imaging state of charge and its correlation to interaction variation in an LiMn_(0.75)Fe_(0.25)PO_4 nanorods-graphene hybrid

摘要

Visualization of the state of charge (SOC) in an LiMn_(0.75)Fe_(0.25)PO_4 nanorods-graphene hybrid nanostructure (LMFP-C) is realized by chemical mapping of the Fe valance state using scanning transmission X-ray microscopy (STXM).The LMFP-graphene interaction strength variation studied by C K-edge STXM has been correlated to SOC variation, i.e.a stronger interaction was observed for sample regions with a higher SOC in LMFP.Such structure-performance correlation opens new perspectives for a rational design of a better performance olivine cathode for lithium ion batteries.