Bioinspired Redox‐Active Catechol‐Bearing Polymers as Ultrarobust Organic Cathodes for Lithium Storage,Advanced Materials

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Bioinspired Redox‐Active Catechol‐Bearing Polymers as Ultrarobust Organic Cathodes for Lithium Storage
Advanced Materials ( IF 27.4 ) Pub Date : 2017-09-04 , DOI: 10.1002/adma.201703373
Nagaraj Patil ₁ , Abdelhafid Aqil ₁ , Farid Ouhib ₁ , Shimelis Admassie _{2,

3} , Olle Inganäs ₂ , Christine Jérôme ₁ , Christophe Detrembleur ₁

Affiliation

Redox‐active catechols are bioinspired precursors for ortho‐quinones that are characterized by higher discharge potentials than para‐quinones, the latter being extensively used as organic cathode materials for lithium ion batteries (LIBs). Here, this study demonstrates that the rational molecular design of copolymers bearing catechol‐ and Li⁺ ion‐conducting anionic pendants endow redox‐active polymers (RAPs) with ultrarobust electrochemical energy storage features when combined to carbon nanotubes as a flexible, binder‐, and metal current collector‐free buckypaper electrode. The importance of the structure and functionality of the RAPs on the battery performances in LIBs is discussed. The structure‐optimized RAPs can store high‐capacities of 360 mA h g⁻¹ at 5C and 320 mA h g⁻¹ at 30C in LIBs. The high ion and electron mobilities within the buckypaper also enable to register 96 mA h g⁻¹ (24% capacity retention) at an extreme C‐rate of 600C (6 s for total discharge). Moreover, excellent cyclability is noted with a capacity retention of 98% over 3400 cycles at 30C. The high capacity, superior active‐material utilization, ultralong cyclability, and excellent rate performances of RAPs‐based electrode clearly rival most of the state‐of‐the‐art Li⁺ ion organic cathodes, and opens up new horizons for large‐scalable fabrication of electrode materials for ultrarobust Li storage.

中文翻译：

受生物启发的氧化还原活性邻苯二酚聚合物，作为用于锂存储的超健壮有机阴极

氧化还原活性邻苯二酚是受生物启发的原对苯二酚前体，其特征在于其放电电位高于对苯二酚，后者被广泛用作锂离子电池（LIB）的有机阴极材料。在这里，这项研究表明，带有邻苯二酚和Li ⁺离子导电阴离子侧基的共聚物的合理分子设计赋予了氧化还原活性聚合物（RAP）极强的电化学能量存储功能，当与碳纳米管结合使用时具有柔性，粘合剂和无金属集流体的巴克纸电极。讨论了RAP的结构和功能对LIB电池性能的重要性。经过结构优化的RAP可以存储360 mA汞柱的高容量^LIB中的5C ^-1和30C的320 mA hg ^-1。布基纸中的高离子迁移率和电子迁移率还能够在600℃（总放电6 s）的极端C速率下记录96 mA hg ^-1（24％的容量保持率）。另外，在30℃下经过3400次循环后，具有优异的循环能力和98％的容量保持率。RAPs电极的高容量，优异的活性材料利用率，超长的可循环性以及出色的倍率性能，显然可以与大多数最新的Li ⁺离子有机阴极相媲美，并为大规模制造开辟了新的前景。极强健的锂存储电极材料。

更新日期：2017-09-04

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