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协同双极功能化金属有机框架修改分离器,用于稳定和高性能金属电池

Jiaze Lv^1,2,3,4, Zhen Tang^2,3,4, Qiman Zhang^2,3,4,5

¹School of Energy Science and Engineering, University of Science and Technology of China, Hefei 230026, China.

|April 15, 2025

概括

一个新的多功能分离器UFS2@GF通过促进均的沉积和改善离子传输来增强金属电池 (SMB). 这使得高能量密度设备的循环稳定性和性能显著提高.

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:

金属阳极是高能量密度可充电金属电池 (SMB) 的理想选择.
主要挑战包括缓慢的离子 (Na+) 运输动力学和不受控制的树突生长,限制循环稳定性.
现有的分离器往往无法充分解决这些局限性的实际应用.

研究的目的:

开发一个多功能分离器 (UFS2@GF),以克服中小企业中金属阳极的局限性.
为了增强Na+沉积动力学和均性.
提高中小企业的整体循环稳定性和绩效.

主要方法:

使用具有化 (-F) 和硫酸 (-SO3H) 基团功能化的金属有机框架制造UFS2@GF分离器.
结构特征和密度函数理论 (DFT) 的计算.
对称细胞和全细胞的电化学测试 (NaNa3V2(PO4) 3).

主要成果:

UFS2@GF分离器提供了丰富的核化部位,减少了过量的潜能,并实现了均的Na+沉积.
它诱导一种富含无机物的固体电解质间相,促进均的Na+流量并增强电荷转移.
-F和-SO3H组的协同作用显著加速Na+运输动力学,由更高的转移数和离子导电性证明.
在对称细胞中以0.25 mA cm-2的速度在2500小时内稳定循环,在完整细胞中具有出色的特定容量.

结论:

UFS2@GF分离器有效地解决了中小企业的Na+运输动力学和树突生长问题.
协同作用的功能组策略对于为高性能中小企业开发先进的分离器至关重要.
这项工作表明了实现稳定和高能量密度的金属电池的有希望的方法.

关键词:

快速的离子运输可以实现.金属-有机的框架.分离器分离器分离器分离器分离器纳友的地点.金属电池的电池是一种金属电池.

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