普鲁士蓝
阴极
离子液体
成核
电池(电)
离子键合
化学工程
钠
离子
无机化学
材料科学
化学
纳米技术
电极
电化学
有机化学
冶金
物理
物理化学
功率(物理)
量子力学
催化作用
工程类
作者
Ying Jiang,Ying Zhou,Ditong Chu,Zhengqing Ye,Ziheng Wang,Yan Chen,Anni Liu,Zekai Lv,Wenbin Sun,Man Xie
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2022-06-14
卷期号:5 (6): 7822-7829
被引量:11
标识
DOI:10.1021/acsaem.2c01357
摘要
Sodium-ion batteries (SIBs) are bright competitors for large-scale energy storage owing to infinite global reserves and the low cost of sodium. Prussian blue (PB) and its analogues are up-and-coming cathodes for SIBs due to their environmental friendliness, open framework, and facile preparation process. However, PB synthesized through traditional methods shows several vacancies and structural defects, which results in structure collapse and inferior cycling performance. In this work, an ionic liquid is introduced into the PB structure (denoted as IL-PB), which greatly reduces the nucleation rate. Thus, IL-PB delivers a high specific capacity of 134 mAh g–1 at 50 mA g–1 and stable cycling performance with a capacity retention of 77.3% at 100 mA g–1 after 500 cycles. The good property originates from the fewer vacancies and coordinated water in IL-PB materials. The reversible transformation mechanism of the IL-PB materials was further revealed by in situ characterizations. The introduction of ionic liquid provides an idea for the preparation of high-quality PB materials.
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