{"title":"共轭增强聚酰亚胺实现高容量铵离子存储","authors":"Fuyao Huang, Wenkai Zhao, Yujia Guo, Yongqi Mi, Sehrish Gull, Guankui Long, Pengcheng Du","doi":"10.1002/adfm.202407313","DOIUrl":null,"url":null,"abstract":"Aqueous ammonium ion batteries (AIBs) have emerged as a promising next‐generation rechargeable battery due to their safety, sustainability, abundant resources, and superior electrochemical performance. However, organic anode materials, particularly polyimide anode materials, suffer from low specific capacity caused by limited active sites. Herein, the study has developed a micro‐granular‐structured π‐conjugated enhanced polyimide (PTPD) as the anode material for AIBs. The large π‐conjugated enhanced structure enables long‐range electron delocalization, decreased bandgap, and reduced spatial steric hindrance, resulting in increased active sites capable of storing NH<jats:sub>4</jats:sub><jats:sup>+</jats:sup> ions. PTPD exhibits reversible oxidation and reduction reaction in (NH<jats:sub>4</jats:sub>)<jats:sub>2</jats:sub>SO<jats:sub>4</jats:sub> solution, delivering a high specific capacity of 206.67 mAh g<jats:sup>−1</jats:sup> at a current density of 0.5 A g<jats:sup>−1</jats:sup>, exceptional rate capability, and excellent cycling stability with a capacity retention of 74.28% after 2500 cycles at a current density of 10 A g<jats:sup>−1</jats:sup>. Furthermore, theoretical simulations and materials analysis demonstrate that PTPD undergoes enol‐keto transformation of carbonyl groups, effectively capturing NH<jats:sub>4</jats:sub><jats:sup>+</jats:sup> to store charges. This study provides an effective strategy for designing polymer‐based AIBs anodes with high specific capacity and cycling stability.","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":null,"pages":null},"PeriodicalIF":18.5000,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Conjugated Enhanced Polyimide Enables High‐Capacity Ammonium Ion Storage\",\"authors\":\"Fuyao Huang, Wenkai Zhao, Yujia Guo, Yongqi Mi, Sehrish Gull, Guankui Long, Pengcheng Du\",\"doi\":\"10.1002/adfm.202407313\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Aqueous ammonium ion batteries (AIBs) have emerged as a promising next‐generation rechargeable battery due to their safety, sustainability, abundant resources, and superior electrochemical performance. However, organic anode materials, particularly polyimide anode materials, suffer from low specific capacity caused by limited active sites. Herein, the study has developed a micro‐granular‐structured π‐conjugated enhanced polyimide (PTPD) as the anode material for AIBs. The large π‐conjugated enhanced structure enables long‐range electron delocalization, decreased bandgap, and reduced spatial steric hindrance, resulting in increased active sites capable of storing NH<jats:sub>4</jats:sub><jats:sup>+</jats:sup> ions. PTPD exhibits reversible oxidation and reduction reaction in (NH<jats:sub>4</jats:sub>)<jats:sub>2</jats:sub>SO<jats:sub>4</jats:sub> solution, delivering a high specific capacity of 206.67 mAh g<jats:sup>−1</jats:sup> at a current density of 0.5 A g<jats:sup>−1</jats:sup>, exceptional rate capability, and excellent cycling stability with a capacity retention of 74.28% after 2500 cycles at a current density of 10 A g<jats:sup>−1</jats:sup>. Furthermore, theoretical simulations and materials analysis demonstrate that PTPD undergoes enol‐keto transformation of carbonyl groups, effectively capturing NH<jats:sub>4</jats:sub><jats:sup>+</jats:sup> to store charges. This study provides an effective strategy for designing polymer‐based AIBs anodes with high specific capacity and cycling stability.\",\"PeriodicalId\":112,\"journal\":{\"name\":\"Advanced Functional Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":18.5000,\"publicationDate\":\"2024-07-26\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advanced Functional Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1002/adfm.202407313\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Functional Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/adfm.202407313","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
摘要
水铵离子电池(AIBs)因其安全性、可持续性、丰富的资源和优异的电化学性能,已成为一种前景广阔的下一代充电电池。然而,有机负极材料,尤其是聚酰亚胺负极材料,因活性位点有限而导致比容量较低。本研究开发了一种微颗粒结构的π共轭增强聚酰亚胺(PTPD)作为 AIB 的阳极材料。大型π-共轭增强结构可实现长程电子析出、降低带隙并减少空间立体阻碍,从而增加了能够存储 NH4+ 离子的活性位点。PTPD 在 (NH4)2SO4 溶液中表现出可逆的氧化和还原反应,在 0.5 A g-1 的电流密度下可提供 206.67 mAh g-1 的高比容量、卓越的速率能力和出色的循环稳定性,在 10 A g-1 的电流密度下循环 2500 次后容量保持率为 74.28%。此外,理论模拟和材料分析表明,PTPD 会发生羰基的烯醇-酮基转化,从而有效捕获 NH4+ 以存储电荷。这项研究为设计具有高比容量和循环稳定性的聚合物基 AIBs 阳极提供了一种有效的策略。
Conjugated Enhanced Polyimide Enables High‐Capacity Ammonium Ion Storage
Aqueous ammonium ion batteries (AIBs) have emerged as a promising next‐generation rechargeable battery due to their safety, sustainability, abundant resources, and superior electrochemical performance. However, organic anode materials, particularly polyimide anode materials, suffer from low specific capacity caused by limited active sites. Herein, the study has developed a micro‐granular‐structured π‐conjugated enhanced polyimide (PTPD) as the anode material for AIBs. The large π‐conjugated enhanced structure enables long‐range electron delocalization, decreased bandgap, and reduced spatial steric hindrance, resulting in increased active sites capable of storing NH4+ ions. PTPD exhibits reversible oxidation and reduction reaction in (NH4)2SO4 solution, delivering a high specific capacity of 206.67 mAh g−1 at a current density of 0.5 A g−1, exceptional rate capability, and excellent cycling stability with a capacity retention of 74.28% after 2500 cycles at a current density of 10 A g−1. Furthermore, theoretical simulations and materials analysis demonstrate that PTPD undergoes enol‐keto transformation of carbonyl groups, effectively capturing NH4+ to store charges. This study provides an effective strategy for designing polymer‐based AIBs anodes with high specific capacity and cycling stability.
期刊介绍:
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