Conjugated Polymer/Graphene composite as conductive Agent-Free electrode materials towards High-Performance lithium ion storage

Polymer materials containing C6 rings and C@O become promising electrode materials for high-performance lithium ion batteries (LIBs). However, the poor electronic conductivity severely restricts its further application. Herein, we design and construct a pyromellitic dianhydride anhydride anthraquinone/reduced graphene oxides (PMAQ/rGO-40) composite as an anode material for LIBs. The PMAQ is uniformly wrapped by conductive rGO nanosheets. The PMAQ/rGO-40 electrode without additional conductive agents displays a discharge capacity of 253 mAh g(-1) over 3000 cycles under 2A g(-1), which is higher than that of the PMAQ electrode with conductive agents. Meanwhile, a capacity of 196 mAh g(-1) is achieved under 5A g(-1). The enhanced cycling performance and rate ability are attributed to the rGO conductive network, which promotes electronic transport capability. In addition, the lithium ion storage mechanism and kinetics in the PMAQ/rGO-40 are investigated. The excellent electrochemical performance shows the potential application of the PMAQ/rGO composite anode material for high performance LIBs. (C) 2022 Elsevier Inc. All rights reserved.