A designed core-shell structural composite of lithium terephthalate coating on Li₄Ti₅O₁₂ as anode for lithium ion batteries

详细信息    查看全文

• 作者：Yong Yan^a ; Liubin Ben^a ; Yuanjie Zhan^a ; Yanyan Liu^a ; Yi Jin^b ; Suijun Wang^b ; Xuejie Huang^a ; ^{xjhuang@iphy.ac.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Lithium ion batteries ; LTO ; Organic anode ; Composite ; Li-ion transfer
• 刊名：Progress in Natural Science
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：26
• 期：4
• 页码：368-374
• 全文大小：3017 K

文摘

A core-shell structural composite was synthesized with lithium terephthalate (Li₂C₈H₄O₄) coated on spinel Li₄Ti₅O₁₂ (LTO). The composite displays a capacity of about 200 mA h g⁻¹ and a good rate capability with two charge/discharge platforms at ~1.55 and ~0.8 V. The excellent cycling performance of the composite is attributed to the successful combination of high cycling stability of LTO and high specific capacity of Li₂C₈H₄O₄. In addition, an interesting phenomena is observed for the first time for this composite which is that lithium ions transfer between LTO and Li₂C₈H₄O₄ at a fast speed. This is investigated in details via the asymmetric charge/discharge measurement and cyclic voltammogram (CV). The LTO/Li₂C₈H₄O₄ composite may have potential applications to be used as an anode material for the electric vehicle batteries, which is shallowly charged/discharged at ordinary times using the charge/discharge platform of LTO and fully charged/discharged at emergency to release the extra high capacity from Li₂C₈H₄O₄.