| 普鲁士蓝正极材料的离子交换法制备及电化学储钾性能 |
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| 引用本文： | 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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| 作者姓名： | 孙云坡 谢健 赵新兵 庄大高 张根林 |
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| 作者单位： | 浙江大学材料科学与工程学院, 杭州 310027,浙江大学材料科学与工程学院, 杭州 310027,浙江大学材料科学与工程学院, 杭州 310027,上海汉行科技有限公司, 上海 201322,上海汉行科技有限公司, 上海 201322 |
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| 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 |
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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。
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| 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 |
| 收稿时间： | 2019-07-04 |
| 修稿时间： | 2019-11-11 |
Prussian Blue Cathode Material: Preparation by Ion-Exchange Method and Electrochemical Potassium-Storage Performance |
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| SUN Yun-Po,XIE Jian,ZHAO Xin-Bing,ZHUANG Da-Gao and 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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| Authors: | SUN Yun-Po XIE Jian ZHAO Xin-Bing ZHUANG Da-Gao ZHANG Gen-Lin |
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| Affiliation: | School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China,School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China,School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China,Shanghai Han Xing Science and Technology Co., Ltd., Shanghai 201322, China and 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. |
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| Keywords: | potassium-ion battery cathode material Prussian blue material ion-exchange method electrochemical performance |
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