期刊
ADVANCED FUNCTIONAL MATERIALS
卷 27, 期 4, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201604307
关键词
cathodes; full-cells; nanoparticles; potassium-ion batteries; Prussian blue
类别
资金
- European Research Council [240144, 737616]
- BMBF [03Z1MN11]
- German Research Foundation (DFG) [LE 2249_4-1]
- National Natural Science Foundation of China [21577086]
- Shanghai Thousand Talent Plan
- European Research Council (ERC) [737616] Funding Source: European Research Council (ERC)
Potassium-ion batteries (KIBs) in organic electrolytes hold great promise as an electrochemical energy storage technology owing to the abundance of potassium, close redox potential to lithium, and similar electrochemistry with lithium system. Although carbon materials have been studied as KIB anodes, investigations on KIB cathodes have been scarcely reported. A comprehensive study on potassium Prussian blue K0.220Fe[Fe(CN)(6)](0.805)4.01H(2)O nanoparticles as a potential cathode material is for the first time reported. The cathode exhibits a high discharge voltage of 3.1-3.4 V, a high reversible capacity of 73.2 mAh g(-1), and great cyclability at both low and high rates with a very small capacity decay rate of approximate to 0.09% per cycle. Electrochemical reaction mechanism analysis identifies the carbon-coordinated Fe-III/Fe-II couple as redox-active site and proves structural stability of the cathode during charge/discharge. Furthermore, for the first time, a KIB full-cell is presented by coupling the nanoparticles with commercial carbon materials. The full-cell delivers a capacity of 68.5 mAh g(-1) at 100 mA g(-1) and retains 93.4% of the capacity after 50 cycles. Considering the low cost and material sustainability as well as the great electrochemical performances, this work may pave the way toward more studies on KIB cathodes and trigger future attention on rechargeable KIBs.
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