Regensburg 2019 – wissenschaftliches Programm
KFM 14.6: Poster
Mittwoch, 3. April 2019, 16:00–18:30, Poster C
A low cost potassium Prussian blue cathode for potassium ion batteries — •Chenglin Zhang, Yang Xu, Long Liu, and Yong Lei — Institute für Physics & IMN MacroNano (ZIK), Technische Universität Ilmenau, Ilmenau 98693, Germany
Potassium-ion batteries (PIBs) have attracted increasing attention as a promising alternative to lithium-ion batteries. The hydrated potassium Prussian blue, K0.220Fe[Fe(CN)6]0.805, as a potential cathode material is first demonstrated in PIBs. The cathode exhibits a large reversible capacity within a high and flat potassiation potential of 3.1~3.4 V as well as a great cyclability. Electrochemical reaction mechanism analysis identifies the carbon-coordinated FeIII/FeII couple as redox-active site and proves structural stability of the cathode during charging/discharging. Furthermore, we present a PIB full-cell by coupling the Prussian blue nanoparticles with commercial carbon materials, which confirms the value of practical applications. Considering the low cost and material sustainability, this work is of great significance for the future research and commercial applications of PIBs electrode materials.
 Chenglin Zhang, Yang Xu, Min Zhou, Liying Liang, Huishuang Dong, Minghong Wu, Yi Yang, and Yong Lei*[J] Adv. Funct. Mater. (2017):1604307.