Porous polyimide framework based on perylene and triazine for reversible potassium-ion storage,Materials Chemistry Frontiers

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Porous polyimide framework based on perylene and triazine for reversible potassium-ion storage
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2021-08-13 , DOI: 10.1039/d1qm00843a
Jialing Wu _{1,

2} , Sijia Di ₂ , Wei Huang ₂ , Yunling Wu ₂ , Qiliang Huang ₂ , Xuan Zhao ₂ , Xiaohan Yu ₂ , Mochun Zhang ₂ , Hualin Ye ₃ , Yanguang Li _{1,

2}

Affiliation

Potassium-ion batteries have attracted considerable attention as an emerging energy-storage solution due to the abundance of potassium resources. The current development of potassium-ion batteries is, however, largely impeded by the lack of high-capacity and cyclable electrode materials. Herein, we report that porous polyimide frameworks (PIFs) based on perylene and triazine are a promising anode material for potassium-ion batteries. Thanks to the high-density electroactive imide groups and their robust molecular structure, our PIF delivers a large reversible specific capacity of ∼190 mA h g⁻¹ at 0.2 A g⁻¹, a good rate performance (∼115 mA h g⁻¹ at 2 A g⁻¹) and long cycling stability (83% capacity retention after 1000 cycles at 5 A g⁻¹). These metrics render PIFs a highly promising anode material for potassium-ion batteries for future large-scale energy-storage applications.

中文翻译：

用于可逆钾离子存储的基于苝和三嗪的多孔聚酰亚胺骨架

由于钾资源丰富，钾离子电池作为一种新兴的储能解决方案受到了广泛关注。然而，目前钾离子电池的发展在很大程度上受到缺乏高容量和可循环电极材料的阻碍。在此，我们报告了基于苝和三嗪的多孔聚酰亚胺骨架 (PIF) 是一种很有前途的钾离子电池负极材料。由于高密度的电活性酰亚胺基团及其坚固的分子结构，我们的 PIF在 0.2 A g ^{-1 时}提供了 ~190 mA hg ^-1的大可逆比容量，良好的倍率性能（~115 mA hg ^-1在 2 A g ^-1 ) 和长循环稳定性（5 A g 下 1000 次循环后容量保持率为 83%^-1 )。这些指标使 PIF 成为未来大规模储能应用的钾离子电池负极材料。

更新日期：2021-08-31

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