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重塑碳涂层的Mn₂Mo₃O₈纳米管并提高储存性能

Lifeng Zhang¹, Liyue Xue¹, Jiaxi Bai¹

¹School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi'an, 710021, China. zhanglifeng@sust.edu.cn.

Chemical communications (Cambridge, England)

|November 14, 2023

概括

研究人员开发了用于增强离子电池阳极的新型酸/碳纳米管 (Mn2Mo3O8/C). 这种材料在半电池和全电池中表现出色,为先进的储能解决方案提供了有前途的途径.

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
纳米技术纳米技术

背景情况:

微米大小的聚酸 (MnMoO4) 块对高效的储存提出了挑战.
开发纳米结构材料对于提高电池阳极性能至关重要.

研究的目的:

将微米大小的MnMoO4重塑成Mn2Mo3O8/C纳米管 (MMOC-2),用于增强的离子电池阳极.
为了研究合成材料的储存性能和结构性质.

主要方法:

微波联合化方法利用多巴胺作为切割剂和碳源.
从MnMoO4块中合成Mn2Mo3O8/C纳米管.

主要成果:

合成的MMOC-2在半细胞中表现出极好的储能性能 (217 mA h g-1在500个循环后具有~99%的库伦比效率).
在全细胞测试中,MMOC-2在100个循环后显示出75%的容量保留.
增强的性能归因于独特的纳米管纳米结构,丰富的活性点,短的离子扩散路径和快速的电荷转移.

结论:

微波辅助重塑方法有效地产生具有优越电化学性能的Mn2Mo3O8/C纳米管.
纳米结构的MMOC-2材料显示出作为离子电池的高性能阳极的巨大潜力.

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