▎ 摘　　要

NOVELTY - 2,2,6,6-tetramethylpiperidin-1-olate based aqueous anode polymer (I) is new. USE - (I) is useful as anode battery material in small molecular liquid flow battery system (claimed). ADVANTAGE - (I): has increased molecular weight which can reduce cross-contamination between active substances and reduce decrease of battery capacity, and directly used to reduce cost as porous membrane with lower cost; can suppresses concentration polarization using polymer electrolyte with high concentration and low viscosity; improves stability of battery; and obtains liquid flow battery with easy preparation of active materials, high capacity, high safety performance, and stable charge-discharge performance, which can meet needs of industrial energy storage. DETAILED DESCRIPTION - 2,2,6,6-tetramethylpiperidin-1-olate based aqueous anode polymer of formula (I) is new. INDEPENDENT CLAIMS are also included for: 1. preparation of (I); and 2. small molecular liquid flow battery system, comprising anode battery materials and cathode battery material, where the anode battery material is (I) and cathode battery material is 1,1'-dimethyl-4,4'-bipyridine-1,1'-diium chloride (V).