In Situ Studies of 30% Li-Doped Bi₂₅FeO₄₀ Conversion Type Lithium Battery Electrodes.

ABSTRACT: One of the important discharge mechanisms for lithium batteries is the conversion reaction mechanism, where a metal oxide (fluoride) can decompose into metallic nanoparticles embedded in a Li₂O (LiF) matrix. Here, 30% Li-doped Bi₂₅FeO₄₀ is successfully synthesized and displays an electrochemical discharge capacity of ∼300 mAh/g above 1.5 V (vs Li/Li⁺). During the electrochemical cycling process, 30% Li-doped Bi₂₅FeO₄₀ is decomposed into metallic Bi. During the subsequent charging process, the metallic bismuth can be first converted into an amorphous bismuth oxide phase, which contributed to the electrochemical discharge activities observed between 2 and 2.5 V. At a higher charging voltage between 3.5 and 5 V, metallic Bi can

SUBMITTER: Gao M 

PROVIDER: S-EPMC6648275 | biostudies-literature | 2019 Jan

REPOSITORIES: biostudies-literature