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双功能间相促进⁺解溶和运输,使得在低温下能够快速充电的石墨阳极

Yingshan Huang¹, Chaonan Wang¹, Haifeng Lv¹

¹Hefei National Research Center for Physical Sciences at the Microscale, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026, China.

Advanced materials (Deerfield Beach, Fla.)

|December 15, 2023

概括

在石墨阳极上的新化 (Li3P) 涂层显著提高了离子电池在低温下的性能. 这一突破增强了离子传输和稳定性,使其在冷环境中可靠运行.

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:

离子电池 (LIB) 由于电解质粘度,缓慢的离子解离,以及在固体电解质介相 (SEI) 中的缓慢运输,在-20°C以下面临性能退化.
目前的LIB技术在零度以下条件下与能量和功率损失作斗争,限制了它们在寒冷气候中的应用.

研究的目的:

为石墨阳极设计一种强大的涂层,以提高低温离子电池的性能.
为了应对电解质固化,缓慢的离子动力学和在低温温度下溶剂协同插曲的挑战.

主要方法:

在石墨阳极表面上开发了一种连贯的化 (Li3P) 涂层.
研究了Li3P介相的离子导电性和结构完整性.
在使用Li3P涂层石墨阳极和低温碳酸 (PC) 电解质的全电池中评估电池性能.

主要成果:

3P介相表现出高离子导电性,促进了整个SEI的增强+传输.
涂层通过电子转移促进了Li+的脱溶,加速了电荷传输,并防止了溶剂的共同插曲.
带有Li3P涂层阳极的LIB在-20°C (4°C充电) 时保持了70%的容量,在-40°C (0.05°C充电) 时保持了65%.

结论:

工程Li3P涂层有效地减轻了LIBs的低温性能问题.
在冷环境中实现了Libs前所未有的高容量保留和快速充电能力.
开创了一个新的战略,开发用于极端温度应用的高性能电池.

关键词:

溶解解离的方法是快速充电快速充电快速充电石墨阳极是一种石墨阳极.低温低温的低温是一个问题.低温电解质低温电解质的使用

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