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高结合性和中性性聚合物使性和无树脂的阳极成为可能

Shiwei Mei^1,2, Zhangyi Zheng^1,2, Yuebin Lian^1,2

¹Soochow Institute for Energy and Materials Innovations, College of Energy, Soochow University, Suzhou 215006, P. R. China.

ACS applied materials & interfaces

|August 27, 2024

概括

研究人员开发了新型的六纳乙烯 (HATN) 化合物,用于修改金属电池 (LMB) 的铜电流收集器. 这些HATN修改的电极显著改善了涂/剥离,提高了库伦比克效率,并抑制了树的生长,以保持稳定的电池性能.

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
电池技术电池技术

背景情况:

铜 (Cu) 电流采集器是金属电池 (LMB) 的有希望的阳极.
现有的设计受到低库伦比克效率 (CE) 和不受控制的树增长的影响.
开发稳定高效的电流采集器对于高性能LMB至关重要.

研究的目的:

合成和研究基于六亚纳 (HATN) 的新型化合物,用于修改Cu电流采集器.
为了提高库伦比克的效率,并抑制涂和剥离期间的树形成.
用修改的Cu电极在LMB中实现稳定的循环性能.

主要方法:

合成两种基于HATN的化合物,其结合和骨干刚度各不相同.
用合成的HATN化合物对Cu电流采集器表面进行修改.
使用半细胞,对称细胞和LiFePO4全细胞进行电化学评估,以评估CE,树抑制和循环稳定性.

主要成果:

与双sp2-碳结合的HATN化合物相比,与西格玛键相关的对应物相比,它表现出更高的电导率和介质度.
用双sp2碳HATN化合物修改的Cu电极显示了增强的CE,并有效地抑制了树的生长.
在LiFePO4全细胞中,在250个周期内实现了稳定的循环,在1C时保持了94.9%的容量.

结论:

定制性巨分子的分子内结合和链条配置是改善沉积在Cu上的关键.
开发的HATN修改的Cu电极为高性能和无金金属电池提供了可行的策略.
这项研究为下一代储能器件中先进的电流采集器设计铺平了道路.

关键词:

结合聚合物的聚合物.六氧化纳纳甲烯性涂层是一种性涂层.阳极是一种阳极.金属电池是金属电池的一种.

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