材料科学
电解质
电池(电)
极化(电化学)
电压
电动势
离子
汽车工程
电气工程
功率(物理)
化学
电极
工程类
物理
物理化学
有机化学
量子力学
作者
Lulu Chai,Junqing Pan,Xiaoyang Zhu,Yanzhi Sun,Xiaoguang Liu,Wei Li,Jinjie Qian,Xifei Li,Xueliang Sun
标识
DOI:10.1021/acsami.2c06146
摘要
The quiescent electrolyte causes serious concentration polarization and dendrite problems during the charging and discharging of the battery, which restricts the development of metal secondary batteries and flow batteries. Herein, we report a new concept of ion motors, with which the directional driving and uniformity of the electrolyte are realized to eliminate the concentration polarization and dendritic phenomenon for secondary metal batteries and flow batteries without additional external energy. In this study, a dendrite-free secondary metal battery with ion motors is constructed to eliminate a considerable concentration polarization voltage by a tiny induced counter electromotive force generated by Lorentz force, significantly improving the output power and energy efficiency of the battery. An actual pump-free flow battery with an ion motor is also assembled, which overcomes the problems of low energy efficiency and the complex structure caused by the traditional flow battery requiring 1-2 pumps to drive the electrolyte. The efficiency of ion motors to drive the electrolyte is hundreds of times higher than that of the mechanical pump. Therefore, the ion motor provides a universal strategy for designing more pump-free flow batteries and metal secondary batteries without the risk of dendrites in the future.
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