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在高效硫电池的曲支上进行非对称协调的单原子Ni催化剂

Jiayao Yu^1,2, Zhiqiang Li^1,2, Changlai Wang¹

¹Institutes of Physical Science and Information Technology and School of Materials Science and Engineering, Anhui University, Hefei 230601, P. R. China.

|March 11, 2026

概括

这项研究引入了一种新的单原子催化剂 (Ni-N3S/C),以提高硫电池的性能. 催化剂有效地抑制了聚硫化物穿,并增强了反应动力学,从而提高了电池的寿命和容量.

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
催化剂是一种催化剂.

背景情况:

硫 (Na-S) 电池具有高的理论能量密度,但受到聚硫化物穿效应和缓慢反应动力学的影响.
开发高效的单原子催化剂 (SAC) 对于解决 Na-S 电池技术中的这些挑战至关重要.

研究的目的:

设计和开发一种新型的单原子催化剂,在曲的碳层上具有非对称的Ni-N3S协调结构 (cNi-N3S/C).
调查催化剂减轻穿效应和加速Na-S电池中硫氧化还原动力学的能力.

主要方法:

cNi-N3S/C催化剂的合成.
包括催化剂在内的Na-S电池的电化学性能测试.
实验性表征和理论计算 (例如,DFT) 来理解催化机制.

主要成果:

cNi-N3S/C催化剂证明了碳曲率和Ni-N3S协调之间的协同效应,诱导局部电荷分布和调节电子结构.
催化剂加速了电荷转移,增强了吸附能量,并增强了硫氧化还原动力学.
带有cNi-N3S/C的Na-S电池在2500个周期后在3.0°C下达到422mAhg-1的容量,每周期的低容量衰变率为0.021%.

结论:

开发的cNi-N3S/C催化剂在提高Na-S电池的性能方面非常有效.
这项工作为设计高效的SAC,用于先进的储能应用提供了宝贵的见解.

关键词:

不对称的协调结构结构.电子结构电子结构地方收费分配地方收费分配一个原子催化剂 - 硫电池的使用情况

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