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Tailored Organic Cathode Material with Multi-Active Site and Compatible Groups for Stable Quasi-Solid-State Lithium-Organic Batteries
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2022-10-03 , DOI: 10.1002/adfm.202209848 Lan Chen 1 , Linqi Cheng 1 , Jie Yu 1 , Juan Chu 1 , Heng‐guo Wang 1 , Fengchao Cui 1 , Guangshan Zhu 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2022-10-03 , DOI: 10.1002/adfm.202209848 Lan Chen 1 , Linqi Cheng 1 , Jie Yu 1 , Juan Chu 1 , Heng‐guo Wang 1 , Fengchao Cui 1 , Guangshan Zhu 1
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Quasi-solid-state lithium-organic batteries have attracted widespread attention in view of their high safety, good mechanical strength, compromise ionic conductivity, and environmental friendliness. However, most organic electrode materials suffer from the undesirable interfacial compatibility, thus causing poor cycling stability. Herein, a quinone-fused aza-phenazine (THQAP) is reported with multi-active site and compatible groups as the cathode material for constructing poly(vinylidene fluoride hexafluoro propylene) (PVDF-HFP)-based quasi-solid-state lithium-organic batteries. Benefitting from the high compatibility between cathode material (THQAP) and gel polymer electrolytes (PVDF-HFP), the dissolution and shuttle reaction of THQAP with hydroxyl groups are suppressed compared with its counterparts (QAP) without hydroxyl groups. As a result, THQAP in quasi-solid-state lithium-organic batteries not only delivers excellent reversible capacity of 240 mAh g−1 at 50 mA g−1, but also exhibits stable cyclability with capacity retention of 78% (160 mAh g−1) after 200 cycles at 200 mA g−1. This study offers a promising strategy to develop quasi-solid-state lithium-organic batteries with higher capacity and cycling stability.
中文翻译：
用于稳定准固态锂有机电池的具有多活性位点和相容基团的定制有机正极材料
准固态锂有机电池以其安全性高、机械强度好、离子电导率低、环境友好等优点受到广泛关注。然而，大多数有机电极材料都存在不理想的界面相容性，从而导致循环稳定性差。在此，报道了一种具有多活性位点和相容基团的醌稠合氮杂吩嗪（THQAP）作为正极材料，用于构建基于聚（偏二氟乙烯六氟丙烯）（PVDF-HFP）的准固态锂-有机电池。得益于正极材料（THQAP）和凝胶聚合物电解质（PVDF-HFP）之间的高相容性，与不含羟基的对应物（QAP）相比，具有羟基的 THQAP 的溶解和穿梭反应受到抑制。因此，-1在 50 mA g -1下，而且在 200 mA g -1下 200 次循环后还表现出稳定的循环能力，容量保持率为 78% (160 mAh g -1 ) 。这项研究为开发具有更高容量和循环稳定性的准固态锂有机电池提供了一种有前途的策略。
更新日期：2022-10-03
中文翻译：
用于稳定准固态锂有机电池的具有多活性位点和相容基团的定制有机正极材料
准固态锂有机电池以其安全性高、机械强度好、离子电导率低、环境友好等优点受到广泛关注。然而，大多数有机电极材料都存在不理想的界面相容性，从而导致循环稳定性差。在此，报道了一种具有多活性位点和相容基团的醌稠合氮杂吩嗪（THQAP）作为正极材料，用于构建基于聚（偏二氟乙烯六氟丙烯）（PVDF-HFP）的准固态锂-有机电池。得益于正极材料（THQAP）和凝胶聚合物电解质（PVDF-HFP）之间的高相容性，与不含羟基的对应物（QAP）相比，具有羟基的 THQAP 的溶解和穿梭反应受到抑制。因此，-1在 50 mA g -1下，而且在 200 mA g -1下 200 次循环后还表现出稳定的循环能力，容量保持率为 78% (160 mAh g -1 ) 。这项研究为开发具有更高容量和循环稳定性的准固态锂有机电池提供了一种有前途的策略。
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