| 铁铁基普鲁士蓝钠离子电池正极材料的共沉淀反应控制 |
| Co-precipitation Reaction Control of FeFe-Based Prussian Blue Cathode Material for Sodium-Ion Batteries |
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| 摘要: 铁铁基普鲁士蓝（NaFeHCF）是一种较为理想的钠离子电池（SIBs）正极材料。但是，如何有效控制合成反应参数来提升NaFeHCF电极材料的循环稳定性仍然是当前需要解决的问题。采用简单的共沉淀法，探索了合成过程中配位剂添加与否和反应温度（0~80℃）的变化对NaFeHCF沉淀产物的形貌结构和电化学性能的协同影响。结果表明，在添加柠檬酸钠配位剂且合成温度为40℃时所得到的NaFeHCF正极材料在形貌、晶粒尺寸、结晶性等多方面具有综合优势，表现出最佳的循环稳定性，在120 mA·g-1的电流密度下循环1 500圈后仍然具有83.5 mAh·g-1的放电比容量，容量保持率为79.4%。 |
| 关键词: 钠离子电池 正极材料 普鲁士蓝 配位剂 反应温度 |
| 基金项目: 新疆自治区研究生教育教学改革项目（No.XJ2019GY10）、国家自然科学基金项目（No.51763022、52172184）、中央高校基本科研业务费项目（No.ZYGX2019J024）资助。 |
| Abstract: FeFe-based Prussian blue (NaFeHCF) is a promising cathode material for sodium-ion batteries (SIBs). However, how to effectively control the synthesis parameters to improve the cycling stability of NaFeHCF in sodiumion batteries remains to be addressed. In this work, NaFeHCF powders were prepared through the co-precipitation method, and the synergetic effects of a complexing agent (with or without sodium citrate) and reaction temperature (0 - 80 ℃ ) on the physical and electrochemical properties of NaFeHCF were investigated in detail. The results showed that NaFeHCF powders synthesized with the addition of a complexing agent and at a temperature slightly above room temperature (40 ℃) exhibited the most appropriate properties in terms of morphology, grain size, and crystallinity. Therefore, the SIB cathode using this material showed the highest cycling stability, being able to deliver a discharge capacity of 83.5 mAh·g-1 after 1 500 cycles at the current density of 120 mA·g-1 with capacity retention of 79.4%. |
| Keywords: sodium-ion battery cathode material Prussian blue complexing agent reaction temperature |
| 投稿时间：2021-07-31 修订日期：2021-11-20 |
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| 阳澜,夏鑫,汪东煌,周爱军.铁铁基普鲁士蓝钠离子电池正极材料的共沉淀反应控制[J].无机化学学报,2022,38(1):111-118. |
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