Mesoporous LiFePO₄ as a cathode material for rechargeable lithium ion batteries

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• 作者：Yu Renp> ; p>p>renyu3@gmail.comp> ; Peter G. Brucep> ; p>p>p.g.bruce@st-andrews.ac.ukp>
• 关键词：Mesoporous ; LiFePO4 ; Carbon nanoparticle ; Cathode ; Nanostructured materials
• 刊名：Electrochemistry Communications
• 出版年：2012
• 期刊代码：29_13882481
• 类别：ch
• 出版时间：April, 2012
• 卷：17
• 期：Complete
• 页码：60-62
• 文件大小：448 K

摘要

Mesoporous LiFePO₄ cathode material resembling the structure of Swiss-cheese was prepared by a one-pot reaction using hydrophilic carbon nanoparticles (20-30 nm) as the template. The LiFePO₄ has submicron-sized particles with a bimodal mesopore size distribution centered at 2.9 and 30 nm. The introduction of mesopore is good for the electrolyte flooding and Lip>+p> diffusion. The 3.8%remaining carbon in the mesopore ensures the complete reduction of Fep>3 +p>. It exhibits a high discharge capacity of 137 mAh/g at 1 C. After high rate charge and discharge at 30 C (one full discharge in 2 min) its capacity can be recovered to 160 mAh/g.