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超快速双相Na₅V₃(PO₄)₂(P₂O₇)₂/C复合阴极用于离子电池

Yu Bai¹, Yunyun Liu¹, Yangyang Zhang¹

¹College of Chemistry & Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, China. xiangxingde@nefu.edu.cn.

Chemical communications (Cambridge, England)

|March 6, 2025

概括

一种新的双相酸/碳复合物作为离子电池的超快阴极,显示出高容量和优异的长期稳定性.

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:

可充电离子电池 (SIB) 由于的丰富性,是离子电池的有希望的替代品.
开发高性能阴极材料对于推进SIB技术至关重要.
超快速充电功能对于实际的SIB应用来说是非常理想的.

研究的目的:

为SIB阴极开发一种新的双相复合材料.
为了研究复合材料作为超快阴极的电化学性能.
评估材料的长期循环稳定性.

主要方法:

使用一种成分调节策略,合成了一种两相Na5V3(PO4)2(P2O7) 2 / C复合物.
进行了电化学测试,包括高电流密度的静电循环.
容量保留在延长的循环期内进行了评估.

主要成果:

双相Na5V3 ((PO4) 2 ((P2O7) 2 / C复合材料表现出极好的速度能力.
在电流密度为1000 mA g-1的情况下,实现了高实际容量82.4 mA hg-1.
该材料在1500个循环后显示出88%的令人印象深刻的容量保留.

结论:

开发的双相复合材料是可充电离子电池的非常有前途的超快速阴极材料.
组成调节策略有效地提高了酸的电化学性能.
该材料的高容量和稳定性表明它有可能用于实际的储能应用.

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