高度策略使Na的固体溶液能量储存机制成为可能3V2(PO4) 3 长期水性离子电池的阴极
Lijuan Luo1, Tinghong Gao1, Jiayao Chen1
1College of Big Data and Information Engineering, Guizhou University, Guiyang, Guizhou 550025, China.
ACS applied materials & interfaces
|January 21, 2026
概括
一种新的高率策略通过防止溶解来稳定离子电池阴极. 这种方法提高了水性离子电池 (ASIB) 的电化学性能和循环稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- -酸 (Na3V2(PO4) 3,NVP) 是水性离子电池 (ASIB) 的一个有前途的阴极.
- 实际应用受到瓦纳在水性电解质中的溶解和性能降解的限制.
- 开发稳定和高性能阴极材料对于推进ASIB至关重要.
研究的目的:
- 通过一种简单的sol-gel方法,合成用于ASIB的高性阴极材料.
- 研究高性兴奋剂对NVP的电化学性能和结构稳定性的影响.
- 为了减轻溶解,并提高基于NVP的阴极的循环性能.
主要方法:
- 通过sol-gel方法合成Na3V1.0(Ti,Cr,Mn,Fe,Nb)1.0(PO4)3 (HE-NVP-1.0) 的方法.
- 使用现场X射线衍射 (XRD) 进行表征,以研究 (去) 间隔机制.
- 现场X射线光电子光谱 (XPS) 用于分析循环期间的价值状态转换.
主要成果:
- 高性兴奋剂将典型的两相反应转化为连续的固体溶液反应,最大限度地减少了晶格应变和体积变化 (0.34%).
- HE-NVP-1.0表现出V和Mn的可逆价值转换,无活性剂形成一个稳定的晶格.
- 该材料在0.1Ag-1下释放了56.2mAhg-1,在5.0Ag-1下保持了80.7%的容量,并在5000个循环后保持了91.4%.
结论:
- 高的策略有效地抑制了溶解,并提高了NVP阴极的结构稳定性.
- 对于ASIBs来说,HE-NVP-1.0显示出出色的速率能力和长期循环稳定性.
- 这项工作提出了一种可行的方法,用于优化聚离子类型的正极材料,用于先进的储能应用.
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