First principle calculation of lithiation/delithiation voltage in Li-ion battery materials

• 来源期刊: 科学通报(英文版)
• 学科: 工学
• 年，卷（期）: 2011,（30）
• 页码范围: 3229-3232
• 页数: 4页
• 分类号: TM912
• 语种: 中文

摘要

A first principle method, based on the density functional theory, was used to investigate the average voltage of lithiation/delithiation for Li-ion battery materials across 7 categories and 18 series, including LiMO 2 , LiMn 2 O 4 , LiMPO 4 , Li 2 MSiO 4 and graphite. The average voltage of lithiation/delithiation in the relevant electrode materials was obtained by comparing the total-energy difference, before and after an electrochemical reaction. The calculated values were in good agreement with experimental data. The systematic difference between the simulated and experimental values could be explained in terms of the binding energy on the surface of the lithium electrode. This type of calculation method could be applied as an easy and effective tool for predicting the potential performance of new lithiation/delithiation materials.