Octahedral Fe2P/C anchored on reduced graphene oxide as long-life and high-rate Li-ion battery anodes

• Published in: Ionics 2023-04, Vol.29 (4), p.1347-1357
• Main Authors: Qin, Tao, Zhang, Jun, Hou, Yun-Lei, Wang, Sheng-Guang, Zeng, Rui, Guan, Hao-Bo, Zhao, Dong-Lin
• Format: Article
• Language: English
• Subjects: Anodes; Chemistry; Chemistry and Materials Science; Condensed Matter Physics; Electrochemistry; Energy Storage; Graphene; High temperature; Iron; Lithium-ion batteries; Metal-organic frameworks; Nanocomposites; Nanoparticles; Optical and Electronic Materials; Original Paper; Rechargeable batteries; Renewable and Green Energy; Storage batteries
• ISSN: 0947-7047; 1862-0760
• DOI: 10.1007/s11581-023-04909-z

Among all rechargeable secondary batteries, lithium-ion batteries (LIBs) are the most important breakthrough in the field of energy storage. In this paper, we successfully construct octahedral Fe 2 P/C composite nanoparticles anchored on reduced graphene oxide (Fe 2 P/C@rGO) nanocomposites as LIB anodes, used the synthesized octahedron Fe-metal–organic frameworks and graphene oxide composite (Fe-MOF@GO) as the precursor and NaH 2 PO 2 as phosphorus source via high-temperature calcination. Under a current density of 0.1 A g −1 , the reversible capacity of octahedral Fe 2 P/C@rGO is 983.1 mAh g −1 after 180 cycles. Its long-cycle performance is very good, its reversible capacity can still be kept at 733.3 mAh g −1 at 1.0 A g −1 after 500 cycles. Such excellent capacity is attributed to this unique three-dimensional octahedral structure. At the same time, the doping of P element and the addition of rGO also play an important role.