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具有双反氧中心的六二酸盐为高性能离子电池

Shengyan Feng¹, Ke Yi¹, Chengkang Chang¹

¹School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 200235, China.

ACS applied materials & interfaces

|February 16, 2026

概括

通过晶相工程优化六二 (NiHCF) 阴极材料,显著提高了离子电池 (AIB) 的性能. 形相 (r-NiHCF) 显示出优越的容量,稳定性和离子扩散,用于先进的能量存储.

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:

离子电池 (AIB) 由于强烈的Al3+相互作用,限制了动力学和稳定性,在阴极材料开发中面临挑战.
六酸 (NiHCF) 是一个有前途的阴极材料,但其性能对结构和组成的变化敏感.

研究的目的:

为AIB应用合成和比较NiHCF纳米材料的r-NiHCF和立方 (c-NiHCF) 阶段.
研究晶相对电化学性能,离子扩散和结构稳定性的影响.
为了阐明优化NiHCF阴极中的电荷存储机制.

主要方法:

在不同温度下 (r-NiHCF的80°C,c-NiHCF的150°C) 进行化器调节的溶热合成.
物理化学表征,包括表面积和颗粒大小分析.
电化学测试 (静电循环,速率能力,循环电压测量) 和机械学研究 (Al3+扩散系数的确定).

主要成果:

与c-NiHCF相比,r-NiHCF表现出更有序的格子,更高的Na+含量,更少的空白,减少的水,更大的表面积和更小的颗粒大小.
与c-NiHCF相比,r-NiHCF的初始放电容量是初始放电容量的两倍 (128.8 mAh vs 67.1 mAh g-1),并且容量保留率更高 (500 个循环后为 77.1%).
r-NiHCF表现出增强的速率性能和显著更高的Al3+扩散系数 (1.04 × 10-11 cm2 s-1).

结论:

通过控制合成进行晶相工程是一种可行的策略,可以提高AIBs的NiHCF阴极性能.
由于其优化的物理化学特性,r-NiHCF相提供了改进的电化学动力学和结构稳定性.
这项研究为开发高性能普鲁士蓝色模拟阴极用于多价离子电池提供了见解.

关键词:

阴极材料的材料是正极材料电荷转移动力学电荷转移动力学多金属还氧反应多金属还氧反应.六亚诺酸盐是什么意思非水性离子电池的电池.

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