Engineering Pore Nanostructure of Carbon Cathodes for Zinc Ion Hybrid Supercapacitors

Wenbin Jian; Wenli Zhang; Xueer WeiBingchi WuWanling LiangYing WuJian YinKe LuYanan ChenHusam N. AlshareefXueqing Qiu

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Engineering Pore Nanostructure of Carbon Cathodes for Zinc Ion Hybrid Supercapacitors

机译：Engineering Pore Nanostructure of Carbon Cathodes for Zinc Ion Hybrid Supercapacitors

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Zinc ion hybrid supercapacitors (ZIHCs) with both high power density andhigh energy density have tremendous potential for energy storage applicationssuch as hybrid electric vehicles and renewable energy storage. However,the large radius of hydrated Zn~(2+) ions hampers their efficient storagein micropores with limited pore sizes, resulting in the limited gravimetricspecific capacitance and inferior rate capability of ZIHCs. Therefore, it is criticallyimportant to understand to what extent pore size influences the storageof hydrated Zn~(2+) ions in the pores with limited sizes. Herein, porous carbonnanosheets with different pore architectures are prepared using an ammoniumchloride molten salt carbonization strategy. The influence of pore sizeon hydrated Zn~(2+) ion storage in nanostructured carbon with divergent porearchitectures is analyzed by electrochemical methods and molecular dynamicsimulation. Micropores smaller than 6.0 ? obstruct the diffusion of hydratedZn~(2+) ions, while micropores larger than 7.5 ? exhibit a low diffusion energybarrier for the hydrated Zn~(2+) ions. Mesopores improve capacitance and ratecapability by exposing the electrochemically active sites and enhancing thediffusion of the hydrated Zn~(2+) ions.

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来源
《Advanced functional materials》 |2022年第49期|2209914.1-2209914.13|共13页
作者
Wenbin Jian; Wenli Zhang; Xueer WeiBingchi WuWanling LiangYing WuJian YinKe LuYanan ChenHusam N. AlshareefXueqing Qiu;
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Guangdong Provincial Key Laboratory of Plant Resources BiorefinerySchool of Chemical Engineering and Light IndustryGuangdong University of Technology (GDUT)100 Waihuan Xi Road, Panyu District, Guangzhou 510006, China;

Guangdong Provincial Key Laboratory of Plant Resources BiorefinerySchool of Chemical Engineering and Light IndustryGuangdong University of Technology (GDUT)100 Waihuan Xi Road, Panyu District, Guangzhou 510006, China School of Advanced ManufacturingGuangd;

Materials Science and EngineeringPhysical Science and Engineering DivisionKing Abdullah University of Science and Technology (KAUST)Thuwal 23955-6900, Saudi ArabiaInstitutes of Physical Science and Information TechnologyKey Laboratory of Structure and Functional Regulation of HybridMaterials of Ministry of EducationAnhui Graphene Engineering LaboratoryAnhui UniversityHefei, Anhui 230601, ChinaSchool of Materials Science and EngineeringKey Laboratory of Advanced Ceramics and Machining Technology ofMinistry of EducationTianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin 300072, China;

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mesopores; micropores; porous carbons; rate capability; zinc ion hybrid supercapacitors;

Engineering Pore Nanostructure of Carbon Cathodes for Zinc Ion Hybrid Supercapacitors

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