Fabrication and Porous Architecture of Crosslinked Polyimides for Lithium–Sulfur Batteries and Their Electrochemical Properties
Fabrication and Porous Architecture of Crosslinked Polyimides for Lithium–Sulfur Batteries and Their Electrochemical Properties
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DOI：
10.1021/acs.iecr.1c04634
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发表时间：
2022-02
影响因子：
4.2
通讯作者：
Kaixiang Shi;Y. Lin;Junhao Li;Zhangshi Xiong;Jinyu Liao;Quanbing Liu
中科院分区：
文献类型：
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作者：
Kaixiang Shi;Y. Lin;Junhao Li;Zhangshi Xiong;Jinyu Liao;Quanbing Liu
多孔有机聚合物（POP）作为锂硫电池阴极主体，由于其具有多种制备策略和多功能（可调的多孔限制和强化学吸附锚定）而获得了广泛的关注。目前，通过构造良好的多孔框架和足够的极性物质来开发持久性有机污染物被认为是一种有效的方法。本文在传统聚合交联反应的基础上，制备了交联多孔聚酰亚胺（CR-PPIs）。这些材料提供了足够的空间用于容纳LiPS，并通过物理限制（分级微孔）和强烈的化学吸附锚定（高含量极性杂原子N）的协调功能来缓解穿梭行为。与碳纳米管复合的CR-PPI通过有效的存储方法和传输途径加速电荷/离子迁移。此外，S/CR-PPI-PE复合材料中高含量的吡咯类和吡咯类N物种使其具有上级的电化学性能。
Porous organic polymers (POPs) as lithium–sulfur battery cathode hosts have acquired comprehensive interest owing to various fabrication strategies and multifunctions (tuned porous confinement and intense chemisorption anchoring) for the improved battery performance. Currently, the exploitation of POPs with well-constructed porous frameworks and adequate polar substances is reviewed as an efficient approach. Herein, we provide crosslinked porous polyimides (CR-PPIs) on the basis of traditional polymerization and crosslinking reaction. These materials give adequate space for accommodating LiPSs and relieve shuttle behaviors through the coordinated function of physical confinement (hierarchical micropores) and intense chemisorption anchoring (high-content polar heteroatom N). CR-PPIs composited with carbon nanotubes expedite charge/ion migration through the valid storage method and transport pathway. Moreover, benefiting from the high-content pyrrolic and pyrrolic N species, S/CR-PPI-PE has superior electrochemical properties between these composites.