In situ synthesis of graphitic C3N4–poly(1,3-dioxolane) composite interlayers for stable lithium metal anodes,Sustainable Energy & Fuels

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In situ synthesis of graphitic C3N4–poly(1,3-dioxolane) composite interlayers for stable lithium metal anodes
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2021-3-25 , DOI: 10.1039/d1se00212k
Zilong Zhuang _{1,

2,

3,

4,

5} , Yating Tang _{1,

2,

3} , Bowei Ju _{1,

2,

3} , Feiyue Tu _{1,

2,

3}

Affiliation

Lithium metal anodes (LMAs) possess the largest energy density among all anode candidates, while dendrite growth is a huge barrier in the direct application of LMAs in batteries. Herein, an ultrathin graphitic C₃N₄–poly(1,3-dioxolane) (CN–PDOL) composite interlayer was in situ synthesized by cationic ring-opening polymerization upon lithium metal anodes. Flexible PDOL could isolate electrolytes, remitting the corrosion reactions and consumption of electrolytes, while g-C₃N₄ nanoflakes could reduce the crystallinity of PDOL, increase ion-conductivity and uniform Li-ion fluxes. At a current density of 3 mA cm⁻², the synergistic effect of CN and PDOL could enable 850 h stable Li plating/stripping behavior at an overpotential of 70 mV. In this work, a facile and accessible design of a composite buffer layer was developed for lithium metal anodes, which might be of interest to a broad community investigating surface modifications.

中文翻译：

用于稳定锂金属阳极的石墨C3N4–聚（1,3-二氧戊环）复合中间层的原位合成

锂金属阳极（LMA）在所有候选阳极中具有最大的能量密度，而枝晶的生长是将LMA直接应用于电池的巨大障碍。本文中，通过锂金属阳极上的阳离子开环聚合原位合成了超薄石墨C ₃ N _4-聚（1,3-二氧戊环）（CN-PDOL）复合中间层。柔性PDOL可以隔离电解质，减轻腐蚀反应并减少电解质的消耗，而gC ₃ N ₄纳米片则可以降低PDOL的结晶度，提高离子电导率和均匀的锂离子通量。在3 mA cm ^-2的电流密度下，CN和PDOL的协同作用可在70 mV的超电势下实现850 h稳定的Li镀/剥离行为。在这项工作中，开发了一种适用于锂金属阳极的复合缓冲层的简便设计，这对于研究表面修饰的广大社区可能会很感兴趣。

更新日期：2021-04-09

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