Organic 3D interconnected graphene aerogel as cathode materials for high-performance aqueous zinc ion battery

• 来源期刊: 能源化学
• 年，卷（期）: 2020,（6）
• 页码范围: 52-58
• 页数: 7页
• 语种: 英文

摘要

Aqueous rechargeable zinc ion batteries are very attractive in large-scale storage applications,because they have high safety,low cost and good durability.Nonetheless,their advancements are hindered by a dearth of positive host materials (cathode) due to sluggish diffusion of Zn2+ in the solid inorganic frameworks.Here,we report a novel organic electrode material of poly 3,4,9,10-perylentetracarboxylic dianhydride (PPTCDA)/graphene aerogel (GA).The 3D interconnected porous architecture synthesized through a simple solvothermal reaction,where the PPTCDA is homogenously embedded in the GA nanosheets.The self-assembly of PPTCDA/GA coin-type cell will not only significantly improve the durability and extend lifetime of the devices,but also reduce the electronic waste and economic cost.The self-assembled structure does not require the auxiliary electrode and conductive agent to prepare the electrode material,which is a simple method for preparing the coin-type cell and a foundation for the next large-scale production.The PPTCDA/GA delivers a high capacity of ≥200 mAh g-1 with the voltage of 0.0～1.5V.After 300 cycles,the capacity retention rate still close to 100％.The discussion on the mechanism of Zn2+ intercalation/deintercalation in the PPTCDA/GA electrode is explored by Fourier transform infrared spectrometer (FT-IR),X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) characterizations.The morphology and structure of PPTCDA/GA are examined by scanning electron microscopy (SEM) and transmission electron microscopy (TEM).