| 层状钛硅酸盐化合物作为锂离子电池负极储能材料 |
| Layered Titanosilicates as Energy Storage Anode Materials for Lithium Ion Batteries |
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| 摘要: 锂离子二次电池是手提设备的重要电力来源。近年来,人们为了寻找更新颖更好的锂离子电极材料,开始研究晶形离子交换材料,这种材料具有开放孔道,能够让离子在多孔框架里自由的进出。一种具有层状结构的钛硅酸盐Na-JDF-L1(Na4Ti2Si8O22·4H2O)经过离子交换后被用作锂离子负极材料。它在循环200次后放电容量保持在364 mAh·g-1,并且库伦效率约为100%。通过将TiO2引入Li(Na)-JDF-L1中,有效的提高了材料的首次库伦效率和倍率放电性能。 |
| 关键词: 钛硅酸盐 锂离子电池 离子交换 |
| 基金项目: 国家重点基础研究发展计划(No.2011CB808704),国家自然科学基金(No.21471075),南京大学博士研究生提升计划B项目资助。 |
| Abstract: Rechargeable lithium-ion batteries (LIBs) have become the dominant power source for portable devices. In search for new and better electrode materials for LIBs for future stationary storage, electronic devices and equipments, people have recently started to look over crystalline ion-exchange materials with open channels that facilitate fast lithium ion transportation through the porous network. Herein, the use of Li-exchanged titanosilicate Na-JDF-L1 with a layered structure as anode materials for LIBs was reported. It shows a discharge capacity of 364 mAh·g-1 after the 200th cycle with ca. 100% Coulombic efficiency and negligible loss of capacity, comparable with the lithium titanate anode. Furthermore, the incorporation of TiO2 in Li(Na)-JDF-L1 improves the electrochemical performance of the electrode with better initial Coulombic efficiency and higher rate performance. |
| Keywords: titanosilicates lithium ion batteries ion-exchange |
| 投稿时间：2015-08-21 修订日期：2015-10-13 |
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| 刘美玭,胡宇翔,杜红宾.层状钛硅酸盐化合物作为锂离子电池负极储能材料[J].无机化学学报,2015,31(12):2425-2431. |
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