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基于高的微兴奋剂使得高能量密度和稳定的分层氧化阴极成为可能

Qingyun Yang¹, Zhiliang Xiu¹, Wenzhuo Zhang¹

¹School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)

|April 14, 2025

概括

一个新的高的兴奋剂策略增强了离子电池阴极,提高了能量密度和周期寿命. 这一突破提高了实用的离子电池应用的性能.

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:

过渡金属层氧化物是离子电池 (SIB) 的有希望的阴极材料.
目前的SIB阴极具有较差的速率能力和有限的循环能力,阻碍了商业化.
开发先进的阴极材料对于高效的储能解决方案至关重要.

研究的目的:

为了提高SIBs的O3型分层氧化物阴极的电化学性能.
为了研究高度微兴奋剂对正极特性的影响.
制定一项战略,以提高SIB阴极的能量密度和循环能力.

主要方法:

一种高度的O3型Na0.9 ((NiFeMn) 0.3 ((CuMgAlTiSn) 0.02O2 (HE-NFM) 阴极材料的合成.
电化学表征包括速率能力和循环测试.
密度函数理论 (DFT) 计算,以了解底层机制.

主要成果:

该HE-NFM阴极在0.1°C时实现了442Wh kg-1的超高能量密度.
证明了高速率 (104.4 mAh g-1 在2 C) 和优异的循环性 (95%的容量保留在1 C的100个循环后).
DFT计算显示,由于介导稳定,Na+迁移障碍降低,形成能量降低.

结论:

高微兴奋剂是一种有效的策略,可以提高SIB阴极性能.
与未使用过的材料相比,HE-NFM阴极表现出优越的能量密度,速率能力和循环能力.
这种方法为设计下一代离子电池的先进阴极材料提供了一个新的范式.

关键词:

阴极阴极是指一个阴极.高能量密度的高能量密度.具有高的高.层层的氧化物层层的氧化物离子电池离子电池

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