一种用于高性能硫电池的多功能自承载LLTO/C中间层
Yufei Zhang1, Xinhang Liu1, Qi Jin1
1Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, PR China. wll790107@hotmail.com.
Dalton transactions (Cambridge, England : 2003)
|November 13, 2024
概括
研究人员开发了一种新的中酸 (LLTO) 碳矩阵介层,以克服硫 (Li-S) 电池的关键挑战,显著提高其性能和稳定性,用于未来的能量存储.
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 (Li-S) 电池具有高的理论能量密度,但面临着诸如缓慢的氧化还原动力学,穿效应和树状岩石形成等挑战.
- 这些问题阻碍了Li-S电池技术的实际应用和长期稳定性.
研究的目的:
- 设计和建造Li-S电池的多功能中间层,以解决它们固有的局限性.
- 为了增强氧化还原动力学,促进硫化核化,并抑制树的生长.
主要方法:
- 使用兰酸 (LLTO) 和无形碳纳米纤维矩阵制造一种无粘合剂的,自我支的中间层.
- 系统的电化学测试,以评估电催化特性和对称细胞中的沉积行为.
主要成果:
- 该LLTO碳矩阵介层显示持续高的特异性容量 (703.3mAhg-1在0.1C的200个循环后与5.5mgcm-2的硫负载).
- 实现了特殊的长期循环稳定性,容量为905.9mAhg-1和低衰变率 (每周期0.069%在5C下1000个循环中,含硫量为1mgcm-2).
结论:
- 开发的多功能中间层有效地促进LiPSs的氧化还原动力学,促进Li2S核化,并抑制树状石的形成.
- LLTO碳复合材料显示出作为优化下一代Li-S电池性能的先进中间层的巨大潜力.
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