Electrochemical performance of LiFePO4/GO composite for Li-ion batteries. Issue 6 (15th April 2018)

• Record Type: Journal Article
• Authors: Rajoba, Swapnil J.; Jadhav, Lata D.; Kalubarme, Ramchandra S.; Patil, Pramod S.; Varma, S.; Wani, B.N.
• Is Part Of: Ceramics international. Volume 44:Issue 6(2018)
• Page Start: 6886
• Page End: 6893
• Publication Date: 2018-04-15
• Subjects: Li-ion batteries -- Solution combustion -- Lithium iron phosphate -- Graphene oxide -- XPS; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2018.01.114
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Wide-spread and extended applications of Li-ion secondary batteries necessitate the development of advanced electrode materials with exceptional electrochemical performances, which mostly depends on the cathode materials. LiFePO4 (LFP) has been extensively considered as promising cathode materials due to its high stability, abundance and environmentally friendliness. Herein, a simple solution combustion technique is developed to prepare single phase LFP material with submicron particles. The XPS studies ascertain + 2 and + 5 oxidation states of Fe and P, respectively. The cyclic voltammetry of LiFePO4 reveals redox mechanism of Fe 2+ /Fe 3+ . The LiFePO4 delivers specific capacity of 106 mAh g −1 for 1st cycle with 96.36% coulombic efficiency. Moreover, the presence of graphene oxide (GO), in LFP/GO composite, control the growth and agglomeration of LiFePO4 . On evaluation, LFP/GO shows superior electrochemical performance possessing the specific capacity of 162 mAh g −1 at 0.1 C, owing to the effective conducting network formed by GO reducing Li-ion diffusion path for LiFePO4 .