Pyrolysis of naphthol functionalized polytriarylamine for efficient sodium-ion storage

Abstract

Developing suitable electrode materials for sodium-ion batteries (SIBs) is important to improve the electrochemical performance. Herein, we prepare n-type carbonaceous anodes via pyrolysis of naphthol-functionalized polytriarylamine that manifests rapid Na+ storage. During pyrolysis, gas evolution from poly(DNap-OH) triggers structural rearrangement to form a disordered microstructure with a high char-yield of 72%. When utilizing PDNOH as anodes in SIBs, PDNOH-800 delivered the specific capacity of 212 mA h g-1 at 0.05 A g-1 and stable cycling behavior with C.E. of 99.7%. The n-type characteristics attributed to N- and O-moieties played a critical role to enhance the electrochemical performance of SIBs via surface-induced Na+ storage with fast kinetics. Pyrolysis of poly(DNap-OH) results in the formation of disordered carbon with high char-yield. The pyrolyzed Poly(DNap-OH) shows enhanced electrochemical performance in SIBs via surface-induced Na+ storage, attributed to N- and O-moieties.