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PVP/PAN-derived porous carbon fiber for zinc-ion hybrid supercapacitors

Rare Metals 2024年第7期43卷 3066-3073页

作者： Shu-Hua Yang Wen-Qing Fu Yan-Wei Cui Bing-Qiang Cao Materials Center for Energy and Photoelectrochemical Conversion School of Material Science and EngineeringUniversity of JinanJinan 250022China

Porous carbon fibers are promising cathodes for zinc-ion hybrid supercapacitors(ZHSs)owing to their abundant active sites,great conductivity,and stable physical and chemical ***,designing a proper preparation technique to regulate the microstructure of carbon fibers still remains a great ***,a poly vinylpyrrolidone/po-lyacry lonitrile(PVP/PAN)-derived porous carbon fiber is developed via the PVP/PAN blend electrospinning and hydrothermal selective PVP removal *** hydrothermal selective PVP removal strategy can effectively avoid a cross-linking between PVP and PAN during the traditional stabilization at air *** PVP/PAN-derived porous carbon fiber,the sufficient micropores provide abundant space for the Zn^(2+)storage,whereas the proper mesopores contribute to the fast ion *** hierarchical porous structures endow ZHSs with high specific capacity and high-rate *** ZHS assembled with the optimal PVP/PAN-derived porous carbon fiber(PVP-PANC-0.8)displays an outstanding specific capacity of 208 mAh·g^(-1),high rate capability(49.5%)from 0.5 to 5 A·g^(-1),and 72.25%capacity retention after 10,000 cycles at 0.5 A·g^(-1).

关键词： zinc-ion hybrid supercapacitors Porous carbon fibers Hierarchical porous structures Electrospinning

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Rational design of nitrogen doped hierarchical porous carbon for optimized zinc-ion hybrid supercapacitors

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Nano Research 2019年第11期12卷 2835-2841页

作者： Penggao Liu Yang Gao Yangyang Tan Weifang Liu Yanping Huang Jun Yan Kaiyu Liu Hunan Provincial Key Laboratory of Chemical Power Sources College of Chemistry and Chemical EngineeringCentral South UniversityChangsha410083China Key Laboratory of Energy Materials Chemistry Ministry of EducationKey Laboratory of Advanced Functional MaterialsAutonomous RegionInstitute of Applied ChemistryXinjiang UniversityXinjiang830046China College of Materials Science and Engineering Fuzhou UniversityFuzhou350108China

Aqueous rechargeable zinc-ion hybrid supercapacitors are considered to be a promising candidate for large-scale energy storage devices owing to their high safety,long life,and low *** this paper,a nitrogen doped hierarchical porous carbon is evaluated as the cathode for aqueous rechargeable zinc-ion hybrid *** from the synergistic merits of excellent structural features of N-HPC and tiny zinc dendrite of Zn anode in ZnSO4 electrolyte,the zinc-ion hybrid supercapacitor exhibits excellent energy storage performance including high capacity of 136.8 mAh·g^−1 at 0.1·Ag^−1,high energy density of 191 Wh·kg^−1,large power density of 3,633.4 W·kg^−1,and satisfactory cycling stability of up to 5,000 cycles with a capacity retention of 90.9%.This work presents a new prospect of developing high-performance aqueous rechargeable zinc ion energy storage devices.

关键词： excellent performance zinc dendrite N-HPC zinc-ion hybrid supercapacitors

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Recent progress and challenges of carbon materials for Zn-ion hybrid supercapacitors

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Carbon Energy 2020年第4期2卷 521-539页

作者： Qiyu Liu Haozhe Zhang Jinhao Xie Xiaoqing Liu Xihong Lu MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry The Key Lab of Low-carbon Chem and Energy Conservation of Guangdong ProvinceSchool of ChemistrySun Yat-Sen UniversityGuangzhouChina School of Applied Physics and Materials Wuyi UniversityJiangmenChina

zinc-ion hybrid supercapacitors(ZHSCs)have garnered increasing attention as promising energy storage devices in recent years,as they combine the advantages of high-energy Zn-ion batteries and high-power ***,the development of ZHSCs is still in its infancy and there are many bottlenecks to *** particular,the challenge induced by the limited ion adsorption capability of carbon-positive electrodes severely restricts the energy density of ***,it has become a key issue to design novel carbon-positive electrodes that enable high energy density yet do not deteriorate the intrinsic power capability and long-term *** study focuses on recent achievements in synthesis,morphology,and electrochemical performance of various carbon materials applied in *** modification strategies to optimize their electrochemical performance are briefly *** addition,current challenges and future opportunities in this field are also *** review will be beneficial to provide an organized framework for the research systems of carbon-positive electrodes and develop novel ZHSCs with high energy density.

关键词： carbon energy density graphene zinc-ion hybrid supercapacitors

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Anti-stacking synthesis of MXene-reduced graphene oxide sponges for aqueous zinc-ion hybrid supercapacitor with improved performance

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Journal of Materials Science & Technology 2023年第23期154卷 22-29页

作者： Zonglin Liu Fuhua Xue Xu Zhao Zhong Chen Haowen Zheng Renjie Ding Pengyang Li Liangliang Xu Jinhua Xiong Qingyu Peng Xiaodong He National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080China

Two‑dimensional MXenes with an enormous active surface area are considered to be significant cathode materials for Zn‑ion hybrid supercapacitors. However, the nanosheets are easily self-restacked during the assembly into macroscopic porous electrodes, resulting in a significantly reduced effective surface area, hindering their applications in energy storage. Here, MXenes are subtly distributed on the surface of the sponge in a coral-like structure rather than participating in the assembly of the framework, which has suppressed the self-restacking of MXene effectively, improved the hydrophilicity of the sponge, and provided fast diffusion channels for electrolyte ions. Therefore, the MXene-TiC-reduced graphene oxide sponge exhibits excellent electrical conductivity, an enormous specific surface area with abundant accessible electroactive sites, and superior electrochemical performance. The resulting sponge demonstrates an outstanding specific capacity, up to 501 mAh g–1 at 0.2 A g–1 , with excellent capacity retention (90%) after 3100 cycles as zinc-ion hybrid supercapacitor cathodes. Furthermore, it exhibits an elegant gravimetric energy density of 486 mWh g–1 at 415 mW g–1 , which has surpassed most leading MXene-based Zn-ion cathodes. This work provides a new synthetic idea for MXene-based macro-composites and paves a new avenue for designing next-generation flexible and portable porous electrodes with high gravimetric and rate performances.

关键词： MXene Porous binder-free electrode zinc-ion hybrid supercapacitors In-situ synthesis Self-restacking

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