Prussian blue material, and preparation method and application thereof

• Main Authors: NIE JIANBO, LIU CHUNLI, ZHAO ZHOUFENG, LU KUANGDA, ZENG TINGJIAN, YI YONGLI, ZOU JUNWEN, XU DONGMEI, ZHANG XU, HU JIEZI, JIA CHENGJIE, WANG JIONGGENG, XIE JIAN, ZHOU YUTONG, HUANG HONGYANG, QIU LYUCHAO, LI XIAOYING, ZHANG JIE, ZHOU ZHENGQIANG, YANG FAN, DONG DONG, SUN QINGFENG, SUN YANJUN, ZHOU ZHEN, MEI JIAN, XIONG JIANGUO
• Format: Patent
• Language: Chinese; English
• Published: 27.03.2020
• Subjects: AMMONIA; BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS THEREOF; CYANOGEN; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention discloses a Prussian blue material, and a preparation method and an application thereof. The preparation method comprises the steps: mixing sodium ferrocyanide or a hydrate of sodium ferrocyanide with deionized water to obtain a solution I; mixing soluble ferrous salt, ascorbic acid and sodium citrate with deionized water to obtain a solution II; dropwise adding the solution I and the solution II into deionized water at the same time, and carrying out a coprecipitation reaction to obtain a suspension of a Prussian blue material; and aging and post-processing the suspension to obtain the micron-sized Prussian blue material with a cubic stepped structure. The prepared Prussian blue material is applied to a positive electrode of a sodium ion battery, so that the capacity and thecycling stability of the sodium ion battery can be remarkably improved. 本发明公开了一种普鲁士蓝材料及其制备方法和应用。本发明的制备方法为：将亚铁氰化钠或亚铁氰化钠的水合物与去离子水混合得到溶液I；将可溶性二价铁盐、抗坏血酸和柠檬酸钠与去离子水混合得到溶液II；将溶液I和II同时滴入去离子水中，经共沉淀反应得到普鲁士蓝材料的悬浮液；将上述悬浮液经陈化及后处理得到微米级的具有