假电容
锌
超级电容器
杂原子
碳化
电化学
碳纤维
材料科学
电解质
聚合物
电容
化学工程
纳米技术
电极
冶金
化学
复合材料
复合数
工程类
扫描电子显微镜
物理化学
有机化学
戒指(化学)
作者
Heyang Liu,Dong Shen Tong,Liming Peng,Lingqi Huang,Zhenning Gu,Zhongyi Sheng,Fei Zhang,Yinhang Zhang,Zhijun Hu,Qian Tao,He Zhu
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2023-06-12
卷期号:6 (12): 6752-6759
被引量:3
标识
DOI:10.1021/acsaem.3c00929
摘要
In this work, we demonstrate the preparation of hierarchically porous carbon microspheres as cathodes for high-performance zinc-ion capacitors (ZICs) using ZIF-8-derived polymer composites as the template. Hydro/solvothermal treatment of ZIF-8 with tetrafluoroterephthalonitrile followed by carbonization yields carbon materials with a high specific surface area (up to ∼2000 m2 g–1), hierarchical pore distribution, and large amount of heteroatom dopants. The heterogeneous phases in polymer composites produced from the hydro/solvothermal process were found to be crucial for the hierarchical pore structure in carbon, allowing fast electrolyte ion diffusion. In addition, the trace amounts of zinc compounds trapped in carbon could induce pseudocapacitance, thus promoting the electrochemical performance. As a result, the as-prepared ZICs displayed a maximum specific capacitance of 171.9 mAh g–1, a high energy density of 141.3 Wh kg–1, and a discharge capacitance retention of >95% (at 5000 cycles at 6 A g–1). This polymer composite-templated protocol provides a platform for the preparation of carbon materials for electrochemical energy storage and conversion applications.
科研通智能强力驱动
Strongly Powered by AbleSci AI