High-Energy Aqueous Magnesium Ion Batteries with Capacity-Compensation Evolved from Dynamic Copper Ion Redox

被引：18

作者：

Zhang, Shuxin ^{[1
]}

Wang, Yaowei ^{[2
]}

Sun, Yukun ^{[1
]}

Wang, Yaru ^{[1
]}

Yang, Yang ^{[1
]}

Zhang, Peng ^{[1
]}

Lv, Xuecheng ^{[3
]}

Wang, Jiulin ^{[1
]}

Zhu, Hong ^{[2
]}

NuLi, Yanna ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Shanghai Electrochem Energy Devices Res Ctr, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, Univ Michigan, Shanghai Jiao Tong Univ Joint Inst, Shanghai 200240, Peoples R China

[3] Dalian Univ Technol, Sch Energy & Power Engn, Dalian 116024, Peoples R China

来源：

SMALL | 2023年 / 19卷 / 21期

基金：

中国国家自然科学基金;

关键词：

aqueous electrolytes; capacity-compensation; copper; high energy density; magnesium ion batteries; CATHODE MATERIALS; ELECTROLYTE; PERFORMANCE; NANOPARTICLES; CHALLENGES; KEY;

D O I：

10.1002/smll.202300148

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The low specific capacity and low voltage plateau are significant challenges in the advancement of practical magnesium ion batteries (MIBs). Here, a superior aqueous electrolyte combining with a copper foam interlayer between anode and separator is proposed to address these drawbacks. Notably, with the dynamic redox of copper ions, the weakened solvation of Mg2+ cations in the electrolyte and the enhanced electronic conductivity of anode, which may offer effective capacity-compensation to the 3,4,9,10-perylenetetracarboxylic diimide (PTCDI)-Mg conversion reactions during the long-term cycles. As a result, the unique MIBs using expanded graphite cathode coupled with PTCDI anode demonstrate exceptional performance with an ultra-high capacity (205 mAh g(-1), 243 Wh kg(-1) at 5 A g(-1)) as well as excellent cycling stability after 600 cycles and rate capability (138 mAh g(-1), 81 Wh kg(-1) at 10 A g(-1)).

引用

页数：10

共 58 条

[51] Sulfurized-Pyrolyzed Polyacrylonitrile Cathode for Magnesium-Sulfur Batteries Containing Mg2+/Li+ Hybrid Electrolytes [J].