Abstract
β-FeO1-xOHClx (β-FeOOH) with 2 × 2 tunnel structure and high theoretical capacity over 1000 mAh g−1, is a potential candidate for fast charging anodes for Li-ion batteries. However, low electrical conductivity and poor structure stability leading to inferior rate performance and short life span restrict its further application. In this paper, conductive poly(3,4-ethylenedioxythiophene) (PEDOT) polymer supported and coated FeOOH rods ([email protected]) was synthesized by a facile one-pot fmethod. Lots of nanopieces with abundant active sites were formed during conversion reaction. The coating structure of [email protected] provided closer electrical contact for the pulverized FeOOH particles. Therefore, the confined pulverized particles with high surface area and good electrical conductivity adopt fast pseudocapacitive reaction kinetics to realize high rate performance. Consequently, [email protected] composites as Li ion anodes exhibit extended cycle life and enhanced rate capability. This work reveals that conductive polymer confined pulverization process could realize fast and durable storage for converse-type anodes.
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