Mitra Thakur Ratul, Ma Ting, Shamblin Grant, Oka Suyash S, Lalwani Suvesh M, Easley Alexandra D, Lutkenhaus Jodie L
Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas 77840, USA.
Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77840, USA.
ChemSusChem. 2024 Oct 21;17(20):e202400788. doi: 10.1002/cssc.202400788. Epub 2024 Jun 11.
Organic batteries are one of the possible routes for transitioning to sustainable energy storage solutions. However, the recycling of organic batteries, which is a key step toward circularity, is not easily achieved. This work shows the direct recycling of poly(2,2,6,6-tetramethylpiperidinyloxy-4-yl) (PTMA) and poly(2,2,6,6-tetramethylpiperidinyloxy-4-yl acrylamide) (PTAm) based composite electrodes. After charge-discharge cycling, the electrodes are deconstructed using a solubilizing-solvent and then reconstructed using a casting-solvent. The electrochemical properties of the original and recycled electrodes are compared using cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) cycling, from which it is discovered using time-of-flight secondary ion mass spectrometry (ToF-SIMS) that recycling can be challenged by the formation of a cathode electrolyte interphase (CEI). In turn, an additive is proposed to modify the CEI layer and improve the properties after recycling. Last, an anionic rocking chair battery consisting of PTAm electrodes as both positive and negative electrodes is demonstrated, in which the electrodes are recycled to form a new battery. This work demonstrates the recycling of composite electrodes for organic batteries and provides insights into the challenges and possible solutions for recycling the next-generation electrochemical energy storage devices.
有机电池是向可持续储能解决方案过渡的可能途径之一。然而，有机电池的回收利用作为迈向循环利用的关键一步，却并非易事。这项工作展示了基于聚（2,2,6,6 - 四甲基哌啶氧基 - 4 - 基）（PTMA）和聚（2,2,6,6 - 四甲基哌啶氧基 - 4 - 基丙烯酰胺）（PTAm）的复合电极的直接回收过程。在充放电循环后，使用增溶溶剂对电极进行解构，然后使用浇铸溶剂进行重构。通过循环伏安法（CV）和恒电流充放电（GCD）循环对原始电极和回收电极的电化学性能进行比较，利用飞行时间二次离子质谱（ToF - SIMS）从中发现，阴极电解质界面（CEI）的形成可能会对回收过程造成挑战。相应地，提出了一种添加剂来修饰CEI层并改善回收后的性能。最后，展示了一种由PTAm电极同时作为正负极的阴离子摇椅电池，其中电极经过回收后形成了一个新电池。这项工作展示了有机电池复合电极的回收利用，并为下一代电化学储能装置的回收利用所面临的挑战及可能的解决方案提供了见解。
