材料科学
石墨烯
X射线光电子能谱
阴极
化学工程
扫描电子显微镜
气凝胶
傅里叶变换红外光谱
水溶液
电极
透射电子显微镜
电池(电)
纳米技术
复合材料
有机化学
化学
工程类
物理化学
功率(物理)
物理
量子力学
作者
Ruibai Cang,Ke Ye,Kai Zhu,Jun Yan,Jinling Yin,Kui Cheng,Guiling Wang,Dianxue Cao
标识
DOI:10.1016/j.jechem.2019.09.026
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∼1.5 V. 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).
科研通智能强力驱动
Strongly Powered by AbleSci AI