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双梯度结构设计用于同步相位过渡和耐应力O3型阴极

Yang Gu^1,2,3,4, Shengya He^1,3,4, Kuan Wang³

¹National Power Battery Innovation Center, GRINM Group Co., Ltd., Beijing 100088, P.R. China.

|February 26, 2026

概括

研究人员开发了一种用于离子电池的新阴极材料. 这种双梯度结构通过改善离子分布和减少微裂纹来提高结构稳定性和循环性能.

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:

由于成本和容量,O3型层氧化物是有希望的离子电池阴极.
不均的分布导致相位过渡和裂,限制了电池的寿命.

研究的目的:

合成一种具有增强结构稳定的新型O3型阴极材料.
为了提高离子电池的长周期性能.

主要方法:

合成Na0.99La0.01[Ni1/3Fe1/3Mn1/3]0.99Ti0.01O2使用低扩散元素和强的TM-O键的原理.
在初级和二级粒子水平上设计了La/Ti的双梯度分布.

主要成果:

在二次粒子和快速Na+扩散网络中实现了强大的框架.
成功地减轻了不均的相位过渡,并抑制了裂纹形成.
证明了结构稳定性和长周期性能的改善.

结论:

双梯度结构有效地解决了O3型阴极中不均的分布问题.
这种方法为开发用于离子电池的先进阴极材料提供了机械的见解.

关键词:

Na+ 的扩散动力学.在O3型的分层阴极.双梯度结构设计的结构设计离子电池离子电池应力弹性架构应力弹性架构同步的相位过渡和相位过渡.

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