A High-Performance Rechargeable Mg2+/Li+ Hybrid Battery Using One-Dimensional Mesoporous TiO2(B) Nanoflakes as the Cathode

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• 作者：Shuojian Su ; Yanna NuLi ; Zhenguo Huang ; Qi Miao ; Jun Yang ; Jiulin Wang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2016
• 出版时间：March 23, 2016
• 年：2016
• 卷：8
• 期：11
• 页码：7111-7117
• 全文大小：425K
• ISSN：1944-8252

文摘

Mg²⁺/Li⁺ hybrid batteries have recently been constructed combining a Mg anode, a Li⁺-intercalation electrode, and an electrolyte containing both Mg²⁺ and Li⁺. These batteries have been reported to outperform all the previously reported magnesium batteries in terms of specific capacity, cycling stability, and rate capability. Herein, we report the outstanding electrochemical performance of Mg²⁺/Li⁺ hybrid batteries consisting of a one-dimensional mesoporous TiO₂(B) cathode, a Mg anode, and an electrolyte consisting of 0.5 mol L^–1 Mg(BH₄)₂ + 1.5 mol L^–1 LiBH₄ in tetraglyme. A highly synergetic interaction between Li⁺ and Mg²⁺ ions toward the pseudo-capacitive reaction is proposed. The hybrid batteries show superior rate performance with 130 mAh g^–1 at 1 C and 115 mAh g^–1 at 2 C, together with excellent cyclability up to 6000 cycles.