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Prussian Blue Cathode Material: Preparation by Ion-Exchange Method and Electrochemical Potassium-Storage Performance |
Author Name | Affiliation | E-mail | SUN Yun-Po | School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China | | XIE Jian | School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China | xiejian1977@zju.edu.cn | ZHAO Xin-Bing | School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China | | ZHUANG Da-Gao | Shanghai Han Xing Science and Technology Co., Ltd., Shanghai 201322, China | | ZHANG Gen-Lin | Shanghai Han Xing Science and Technology Co., Ltd., Shanghai 201322, China | |
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Abstract: Na-doped K-based Prussian blue (NKPB) material (K1.9Na0.1Mn[Fe(CN)6]·0.4H2O) was prepared by ion-exchange method using KCl and Na-based Prussian blue (NPB) material(Na2-xMn[Fe(CN)6]z·yH2O) as the precursors. The electrochemical tests reveal that compared with the K-based Prussian blue (KPB) material K1.85Mn[Fe(CN)6]0.98□0.02·0.7H2O (□ is the[Fe(CN)6] vacancy) prepared by a conversional coprecipitation route, the NKPB prepared by ion-exchange method shows higher capacity (the initial discharge capacity at 0.1C reached 136.3 mAh·g-1), longer cycle life (the capacity retention after 100 cycles at 0.5C was 96.1%), and better rate capability (the capacities at 5C and 10C were 87.6 and 68.4 mAh·g-1, respectively). The outstanding electrochemical performance of the NKPB material is ascribed to its high K content, good crystal integrity, Na-ion doping, nanosized particles and the unique open framework structure. |
Keywords: potassium-ion battery cathode material Prussian blue material ion-exchange method electrochemical performance |
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SUN Yun-Po,XIE Jian,ZHAO Xin-Bing,ZHUANG Da-Gao,ZHANG Gen-Lin.Prussian Blue Cathode Material: Preparation by Ion-Exchange Method and Electrochemical Potassium-Storage Performance[J].Chinese Journal of Inorganic Chemistry,2020,36(1):106-112. |
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