Carbon-Nanotube-Decorated Nano-LiFePO_4 @C Cathode Material with Superior High-Rate and Low-Temperature Performances for Lithium-Ion Batteries

摘要

Since the pioneering work of Goodenough and co-workers, olivine-structured lithium iron phosphate (LiFePO_4) has been extensively studied as a cathode material for lithium-ion batteries (LIBs) for on-board energy storage in electric vehicles (EVs) and plug-in hybrid electric vehicles (PHEVs), as well as for stationary energy storage for wind and solar energy. These studies originate from its numerous appealing advantages, such as intrinsic thermal stability, environmental benignity, low cost, and high theoretical capacity (170 mA h g~(-1)). However, its insulating nature and sluggish kinetics of both electron and lithium-ion transport seriously limit its high-rate and low-temperature properties, which are precisely the requirements for these types of applications.