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首页> 外文期刊>Advanced functional materials >Mitigating Ring-Opening to Develop Stable TEMPO Catholytes for pH-Neutral All-Organic Redox Flow Batteries
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Mitigating Ring-Opening to Develop Stable TEMPO Catholytes for pH-Neutral All-Organic Redox Flow Batteries

机译：Mitigating Ring-Opening to Develop Stable TEMPO Catholytes for pH-Neutral All-Organic Redox Flow Batteries

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摘要

Redox-active organics are highly attractive in aqueous organic redox flowbatteries (AORFBs). However, the lack of capacity dense, stable organiccatholytes remains a challenge to develop energy-dense, long cycle-lifeAORFBs. Herein, a stable organic catholyte, 4-[3-(trimethylammonium)acetylamino]-2,2,6,6-tetramethylpiperidine-1-oxyl chloride (TMAAcNHTEMPO) isdeveloped through rational molecular engineering using connective acetamidoand trimethylammonium groups. Paired with bis-(trimethylammonium)propyl viologen tetrachloride anolyte, stable AORFBs (up to 1500 cycles)with a low capacity fade rate of ca. 0.0144% h~（?1） are achieved. Experimentalcharacterizations and theoretical simulations revealed that TMAAcNH-TEMPOis largely stabilized by the reduced reactivity of the nitroxyl radical moiety thatmitigates a ring-opening side reaction.

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