氧化还原
歧化
阳极
电化学
电解质
锰
化学
无机化学
锡
电池(电)
阴极
流动电池
水溶液
材料科学
电极
物理化学
催化作用
有机化学
功率(物理)
物理
量子力学
生物化学
作者
Xuejin Li,Yongchao Tang,Cuiping Han,Zhiquan Wei,Haodong Fan,Haiming Lv,Tonghui Cai,Yongpeng Cui,Yan Zhang,Zhi Chen,Hongfei Li
出处
期刊:ACS Nano
[American Chemical Society]
日期:2023-02-28
卷期号:17 (5): 5083-5094
被引量:11
标识
DOI:10.1021/acsnano.3c00242
摘要
High-potential Mn3+/Mn2+ redox couple (>1.3 V vs SHE) in a static battery system is rarely reported due to the shuttle and disproportionation of Mn3+ in aqueous solutions. Herein, based on reversible stripping/plating of the Sn anode and stabilized Mn2+/Mn3+ redox couple in the cathode, an aqueous Sn-Mn full battery is established in acidic electrolytes. Sn anode exhibits high deposition efficiency, low polarization, and excellent stability in acidic electrolytes. With the help of H+ and a complexing agent, a reversible conversion between Mn2+ and Mn3+ ions takes place on the graphite surface. Pyrophosphate ligand is initially employed to form a protective layer through a complexation process with Sn4+ on the electrode surface, effectively preventing Mn3+ from disproportionation and hindering the uncontrollable diffusion of Mn3+ to electrolytes. Benefiting from the rational design, the full battery delivers satisfied electrochemical performance including a large capacity (0.45 mAh cm-2 at 5 mA cm-2), high discharge plateau voltage (>1.6 V), excellent rate capability (58% retention from 5 to 30 mA cm-2), and superior cycling stability (no decay after 30 000 cycles). The battery design strategy realizes a robustly stable Mn3+/Mn2+ redox reaction, which broadens research into ultrafast acidic battery systems.
科研通智能强力驱动
Strongly Powered by AbleSci AI