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制定减轻Na层氧化物色能力色的战略

Jun Pan¹, Yanhong Liu², Yuanwei Sun^3,4

¹School of Materials Science & Engineering, Nanyang Technological University, Singapore, 639798, Singapore.

Angewandte Chemie (International ed. in English)

|March 25, 2025

概括

离子电池的容量衰减是由铁溶解和溶剂分解引起的. 一种新型的添加剂,二三甲基胺,有效地抑制铁溶解,提高电池性能.

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:

多层氧化物阴极材料对于离子电池至关重要.
这些材料的容量衰减机制尚未完全理解.
铁的溶解和电解质分解有助于性能损失.

研究的目的:

为了阐明NaFe1 / 3Mn1 / 3Ni1 / 3O2.2.的容量色机制.
确定有效的电解质添加剂,以改善容量保留.
提出提高离子电池稳定性的策略.

主要方法:

选电解质添加剂的理论计算.
含的易斯基添加剂的识别.
使用新型添加剂对NaFe1/3Mn1/3Ni1/3O2//硬碳电池进行电化学测试.

主要成果:

在NaFe1 / 3Mn1 / 3Ni1 / 3O2中的容量色主要是由于铁离子溶解.
电解质溶剂的分解是由阴极的电化学潜能引起的.
二三甲基胺显著提高了库伦比克的效率,并减少了铁的溶解.

结论:

铁溶解是限制 NaFe1/3Mn1/3Ni1/3O2 阴极周期寿命的关键因素.
含的易斯基是离子电池的有效电解质添加剂.
二三甲基胺在提高离子电池的稳定性和性能方面显示出很大的前景.

关键词:

容量色机制容量色机制易斯基添加剂的使用方法有Na层的氧化物.离子电池是一种离子电池.在热力学和动力学上.

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