title: Inheritance of Crystallographic Orientation during Lithiation/Delithiation Processes of Single-Crystal α-Fe2O3 Nanocubes in Lithium-Ion Batteries.
abstract: Iron oxides are very promising anode materials based on conversion reactions for lithium-ion batteries (LIBs). During conversion processes, the crystal structure and composition of the electrode material are drastically changed. Surprisingly, in our study, inheritance of a crystallographic orientation was found during lithiation/delithiation processes of single-crystal α-Fe2O3 nanocubes by ex situ transmission electron microscopy. Single-crystal α-Fe2O3 was first transformed into numerous Fe nanograins embedded in a Li2O matrix, and then the conversion between Fe and FeO nanograins became the main reversible electrochemical reaction for energy storage. Interestingly, these Fe/FeO nanograins had almost the same crystallographic orientation, indicating that the lithiated/delithiated products can inherit the crystallographic orientation of single-crystal α-Fe2O3. This finding is important for understanding the detailed electrochemical conversion processes of iron oxides, and this feature may also exist during lithiation/delithiation processes of other transition-metal oxides.
authors.affiliation: Laboratory of Advanced Materials, Collaborative Innovation Center of Chemistry for Energy Materials, ‡Department of Materials Science, and §Department of Chemistry, Fudan University , Shanghai 200438, People's Republic of China.
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Ma
authors.affiliation: Laboratory of Advanced Materials, Collaborative Innovation Center of Chemistry for Energy Materials, ‡Department of Materials Science, and §Department of Chemistry, Fudan University , Shanghai 200438, People's Republic of China.
authors.forename: Manyu
authors.initials: M
authors.lastname: Zhang
authors.affiliation: Laboratory of Advanced Materials, Collaborative Innovation Center of Chemistry for Energy Materials, ‡Department of Materials Science, and §Department of Chemistry, Fudan University , Shanghai 200438, People's Republic of China.
authors.forename: Chongyun
authors.initials: C
authors.lastname: Liang
authors.affiliation: Laboratory of Advanced Materials, Collaborative Innovation Center of Chemistry for Energy Materials, ‡Department of Materials Science, and §Department of Chemistry, Fudan University , Shanghai 200438, People's Republic of China.
authors.forename: Yuesheng
authors.initials: Y
authors.lastname: Li
authors.affiliation: Laboratory of Advanced Materials, Collaborative Innovation Center of Chemistry for Energy Materials, ‡Department of Materials Science, and §Department of Chemistry, Fudan University , Shanghai 200438, People's Republic of China.
authors.forename: Jingjing
authors.initials: J
authors.lastname: Wu
authors.affiliation: Laboratory of Advanced Materials, Collaborative Innovation Center of Chemistry for Energy Materials, ‡Department of Materials Science, and §Department of Chemistry, Fudan University , Shanghai 200438, People's Republic of China.
authors.forename: Renchao
authors.initials: R
authors.lastname: Che
keywords: conversion mechanism; high-angle annular dark-field imaging; inheritance of a crystallographic orientation; lithium-ion battery; α-iron oxide