| 普鲁士蓝正极材料的离子交换法制备及电化学储钾性能 |
| Prussian Blue Cathode Material: Preparation by Ion-Exchange Method and Electrochemical Potassium-Storage Performance |
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| 摘要: 采用氯化钾（KCl）和钠基普鲁士蓝（NPB）材料Na2-xMn[Fe（CN）6]z·yH2O为原料，通过离子交换法制备了掺钠钾基普鲁士蓝（NKPB）材料K1.9Na0.1Mn[Fe（CN）6]·0.4H2O。电化学测试表明，与用传统共沉淀法制备的钾基普鲁士蓝（KPB）材料K1.85Mn[Fe（CN）6]0.98□0.02·0.7H2O（□代表[Fe（CN）6]空位）相比，采用离子交换法制备的NKPB具有更高的容量（0.1C首次放电容量达136.3 mAh·g-1）、较好的循环稳定性（0.5C经过100次循环，容量保持率为96.1%）和优异的倍率性能（5C和10C容量分别为87.6和68.4 mAh·g-1）。NKPB优异的电化学性能与其高的钾含量、完整的晶体结构、钠离子掺杂、纳米级的颗粒尺寸，以及独特的开放框架结构有关。 |
| 关键词: 钾离子电池 正极材料 普鲁士蓝材料 离子交换法 电化学性能 |
| 基金项目: 国家自然科学基金（No.51572238）和浙江省自然科学基金（No.LY19E020013）资助 |
| 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 |
| 投稿时间：2019-07-04 修订日期：2019-11-11 |
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| 孙云坡,谢健,赵新兵,庄大高,张根林.普鲁士蓝正极材料的离子交换法制备及电化学储钾性能[J].无机化学学报,2020,36(1):106-112. |
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