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Mo2C-Co异构与碳纳米片装饰碳微管:用于高性能硫电池的不同手段

Yating Cui¹, Siyu Ji¹, Yujie Zhu¹

¹Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.

Journal of colloid and interface science

|July 29, 2024

概括

研究人员开发了一种新的碳材料 (CCC@MCC) 用Mo2C-Co颗粒来克服硫电池 (LSB) 的局限性. 这种材料有效地捕获聚硫化物,提高电池性能和在低温下稳定性.

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 (LSB) 显示出高能量密度的希望,但受到聚硫化物穿效应和缓慢反应动力学的限制.
开发先进的电极材料对于应对这些挑战和提高LSB性能至关重要.

研究的目的:

为了合成和表征一种新的异构材料 (CCC@MCC),以提高硫电池的性能.
为了研究该材料减轻穿效应和加速聚硫化物转化的能力.

主要方法:

在空心碳微管 (CCC@MCC) 上生长的二维碳纳米板上装饰的Mo2C-Co异质颗粒的合成.
材料结构,导电性,吸附性和催化性质的表征.
在LSB中对CCC@MCC作为中间层和硫宿主进行电化学测试.

主要成果:

该CCC@MCC材料有效地捕获了聚硫化物,并由于导电,吸附和催化的结合,加速了它们的转化.
作为中间层,LSB在2°C时达到881.1 mAh/g,在0°C500个循环后保持438.2 mAh/g.
作为具有7.0 mg cm−2硫载荷的硫载体,LSBs表现出高面积容量5.3 mAh cm−2.2.

结论:

开发的异构结构Mo2C-Co/CCC@MCC材料提供了一种有效的策略,以解决LSB中的聚硫化物问题.
该材料对中间层和硫主体应用都有很大的潜力,可以提高低温性能和高硫载荷能力.

关键词:

自由站立的阴极可以自由站立.功能性的中间层.硫电池是硫电池的一种.在Mo(2)C-Co异构结构中,Mo(2)C-Co异构结构存在.

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