Статья

Three-dimensional holey-graphene/niobia composite architectures for ultrahigh-rate energy storage

Hongtao SunDepartment of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USALin MeiDepartment of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USAJunfei LiangDepartment of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USAZipeng ZhaoDepartment of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USAChain LeeDepartment of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USAHuilong FeiDepartment of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USAMengning DingCalifornia Nanosystems Institute, University of California, Los Angeles, CA 90095, USAJonathan LauDepartment of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USAMufan LiDepartment of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USAChen WangDepartment of Materials Science and Engineering, University of California, Los Angeles, CA 90095, USAXu XuDepartment of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USAGuolin HaoDepartment of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USABenjamin PapandreaDepartment of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USAImran ShakirSustainable Energy Technologies Centre, College of Engineering, King Saud University, Riyadh 11421, Kingdom of Saudi ArabiaBruce DunnCalifornia Nanosystems Institute, University of California, Los Angeles, CA 90095, USAYu HuangCalifornia Nanosystems Institute, University of California, Los Angeles, CA 90095, USAXiangfeng DuanCalifornia Nanosystems Institute, University of California, Los Angeles, CA 90095, USA

2017en

ABI

Аннотация

As with donuts, the holes matter Improving the density of stored charge and increasing the speed at which it can move through a material are usually opposing objectives. Sun et al. developed a Nb 2 O 5 /holey graphene framework composite with tailored porosity. The three-dimensional, hierarchically porous holey graphene acted as a conductive scaffold to support Nb 2 O 5 . A high mass loading and improved power capability were reached by tailoring the porosity in the holey graphene backbone with higher charge transport in the composite architecture. The interconnected graphene network provided excellent electron transport, and the hierarchical porous structure in the graphene sheets facilitated rapid ion transport and mitigated diffusion limitations. Science , this issue p. 599

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Идентификаторы

DOI: 10.1126/science.aam5852

Цитирования и источники

Цитирований: 3Использованных источников: 0

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