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空心立方CoFe普鲁士蓝作为高循环性能水系铵离子电池正极材料
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Abstract:
水系铵离子电池作为一种新兴的电化学储能技术，由于其低成本、高安全性和环境友好性，受到了广泛的关注。本文对普鲁士蓝类似物进行了纳米化改性处理，成功制备了具有优异循环性能和高倍率性能的水系铵离子电池正极材料。采用液相沉淀法合成了CoFePBA材料，并通过正交实验确定了最优的电极材料制备条件。在优化实验方案后，极差分析表明，在最优制备条件下得到的CoFePBA电极在1 A·g？1的电流密度下循环20,000次后，电极仍能保持78%的初始容量，表现出卓越的循环稳定性，同时在0.1 A·g？1的电流密度下展现出55.4 mAh·g？1的高容量。红外光谱测试进一步验证了CoFePBA电极在嵌铵和脱铵过程中具有良好的电化学可逆性。
Aqueous ammonium ion batteries, as an emerging electrochemical energy storage technology, have attracted considerable attention due to their low cost, high safety, and environmental friendliness. In this study, Prussian blue analogs were subjected to nanomization and other modification treatments to successfully prepare high-performance cathode materials for aqueous ammonium ion batteries with excellent cycling and rate performance. CoFePBA materials were synthesized via a liquid-phase precipitation method, and the optimal preparation conditions for the electrode materials were determined through orthogonal experiments. After optimizing the experimental protocol, range analysis revealed that the CoFePBA electrode prepared under the optimal conditions exhibited a high capacity of 55.4 mAh·g？1 at 0.1 A·g？1. Moreover, after 20,000 cycles at 1 A·g？1, the electrode retained 78% of its initial capacity, demonstrating excellent cycling stability. Infrared spectroscopy further confirmed that the CoFePBA electrode exhibited good electrochemical reversibility during the intercalation and de-intercalation of ammonium ions.
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