High-performance lithium-ion batteries based on polymer/graphene hybrid cathode material

Abstract

Organic and carbon-based lithium-ion batteries possess abundant resources, nontoxicity, environmental friendliness, and high performance, and they have been widely studied in the past decades. However, it remains a challenge to construct such batteries with high capacity, high cycling stability, and high conductivity simultaneously. Here, we elaborately design and integrate organic polymer (p-FcPZ) with graphene network to create a hybrid material (p-FcPZ@G) for high-performance lithium-ion batteries (LIBs). The bi-polar polymer p-FcPZ containing multiple redox-active sites endows p-FcPZ@G with both remarkable cycling stability and high capacity. The porous conductive graphene network with a large surface area facilitates rapid ions/electrons transportation, resulting in superior rate performance. Therefore, the half-cell based on p-FcPZ@G cathode exhibits simultaneously high capacity (∼250 mA h g⁻¹ at 50 mA g⁻¹), excellent cycling stability (retention of 99.999% per cycle for 10,000 cycles at 2,000 mA g⁻¹) and superior rate performance. Additionally, the graphene-based full cell assembled with p-FcPZ@G cathode and graphene anode also demonstrates comprehensively high electrochemical performance.