Nuclear microanalysis of lithium dispersion in LiFePO4 based cathode materials for Li-ion batteries

作者：Habrioux A; Surble S^*; Berger P; Khodja H; D'Affroux A; Mailley S; Gutel T; Patoux S

来源：Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms , 2012, 290: 13-18.

DOI：10.1016/j.nimb.2012.08.014

• Nuclear microprobe
• RBS
• PIXE
• PIGE
• Li-ion battery
• LiFePO4
• SEI layer
• Lithium distribution

This paper provides original characterization of battery electrodes by means of nuclear microanalysis. It presents a non-invasive method to investigate simultaneously the concentrations and the distributions of the different constituent elements of a C-LiFePO4 positive electrode as a function of its state of charge (SOC). Since the technique used here is able to identify lithium element, a direct visualization of the possible solid electrolyte interface (SEI) layer can be envisioned. Results obtained open new investigation schemes to a better understanding of mechanisms leading to electrode capacity fading and consequently to improve electrode building processes.

• 出版日期2012-11-1
• 单位中国地震局