Research Progress in Improving the Rate Performance of LiFePO4 Cathode Materials

Abstract

Abstract:Olivine lithium iron phosphate (LiFePO4) is considered as a promising cathode material for high power-density lithium ion battery due to its high capacity, long cycle life, environmental friendly, low cost, and safety consideration. The theoretical capacity of LiFePO4 based on one electron reaction is 170 mAh g −1 at the stable voltage plateau of 3.5 V vs. Li/Li + . However, the instinct drawbacks of olivine structure induce a poor rate performance, resulting from the low lithium ion diffusion rate and low electronic conductivity.In this review, we summarize the methods for enhancing the rate performance of LiFePO4 cathode materials, including carbon coating, elements doping, preparation of nanosized materials, porous materials and composites, etc. Meanwhile, the advantages and disadvantages of above methods are also discussed.

Synthesis of Ni/Co/Al-layered triple hydroxide@brominated graphene hybrid on nickel foam as electrode material for high-performance supercapacitors

“…9 To overcome these limitations and to maximize the capacitance, an efficient incorporation of a versatile class of nanomaterials with a substantial amount of active sites for ion and electrolyte transport in redox reactions is highly favorable. 10 In this regard, materials such as activated carbon, carbon nanotubes (CNTs), graphene, and graphene oxide (GO) with large surface area, high electrical conductivity, 11 and excellent electrochemical stability have been used to hybridize with LDHs. 12 However, previous studies have fallen short of examining the LDH hybridized with halogenated graphene grown directly on nickel foam for improving the electrochemical behavior.…”