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结合的Ni─Co双原子催化剂用于引导电池中的硫和演变

Hong Lin¹, Zhiliang Guo¹, Qingchun Zhang¹

¹State Key Laboratory of Environment-Friendly Energy Materials, School of Materials and Chemistry, Tianfu Institute of Research and Innovation, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, China.

Small (Weinheim an der Bergstrasse, Germany)

|August 8, 2024

概括

具有合Ni-Co对的双金属原子催化剂有效地解决了硫电池 (LSB) 的挑战. 这项创新促进了硫的转化,并指导了涂层,提高了电池的性能和稳定性.

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:

硫电池 (LSBs) 面临的局限性是由于硫反应缓慢和树状石的形成.
双金属原子催化剂提供了一个有希望的策略,通过协同效应来增强LSB活动.

研究的目的:

设计和合成一个新的双原子催化剂与合的Ni-Co原子对 (Ni/Co-DAC).
在LSB中研究Ni/Co-DAC的催化活性和电化学性能.

主要方法:

编程合成Ni/Co-DAC以优化本地电子结构和协调.
使用Ni/Co-DAC的LSB在各种条件下进行电化学测试,包括高硫负载和薄电解质.

主要成果:

/Co-DAC显示了对硫转换的增强催化活性和改进的涂/剥离行为.
带有Ni/Co-DAC的LSB在3.0°C下达到818mAhg-1的容量,降解率低 (500个周期中每周期0.053%).
高面积容量为5.7 mA h cm−2 在硫载量为6.1 mg cm−2 和精电解质的情况下实现.

结论:

在DAC中合的Ni-Co原子对有效地克服了LSB中的动力限制和状物问题.
开发的Ni/Co-DAC催化剂显著提高了LSB的电化学性能和稳定性.
这种催化剂设计具有实际,高性能LSB应用的潜力.

关键词:

-双原子的二元原子.这种合效应是合效应.硫电池是硫电池的一种.硫的演化演化行为

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