期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 5, 期 43, 页码 22465-22471出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta08139a
关键词
-
资金
- National Natural Science Foundation of China [21603171, 51602246]
- Postdoctoral Science Foundation of China [2016M592783]
We propose potassium ferrous ferricyanide (KFeII[Fe-III(CN)(6)]) nano particles with a 3D open framework structure as a cathode for nonaqueous K-ion batteries. Electrochemical reaction mechanism analyses identify that two redox-active sites based on C and N coordinated Fe-II/Fe-III redox couples play a role in K-ion storage, and no phase change occurs in the different states of the initial and second charge-discharge processes. Thus, the (KFeII[Fe-III(CN)(6)] electrode exhibits a high discharge capacity of 118.7 mA h g(-1) at an operating voltage of 3.34 V and extremely excellent cycling stability with a capacity value of 111.3 mA h g(-1) after 100 cycles at 10 mA g(-1). Moreover, an ultralong cycling lifespan of 1000 cycles with a high capacity retention of 80.49% and extraordinary voltage stability at 100 mA g(-1) can be acquired. Ex situ characterizations verify that the outstanding electrochemical performance of (KFeII[Fe-III(CN)(6)] is attributed to superior structural stability and electrochemical reversibility upon long-term cycling. Therefore, the (KFeII[Fe-III(CN)(6)] material can make KlBs competitive in EES applications.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据