Hierarchical nanoporosity enhanced reversible capacity of bicontinuous nanoporous metal based Li-O2 battery

High-energy-density rechargeable Li-O 2 batteries are one of few candidates that can meet the demands of electric drive vehicles and other high-energy applications because of the ultra-high theoretical specific energy. However, the practical realization of the high rechargeable capacity is usually l...

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Bibliographic Details
Published in:Scientific reports 2016-09, Vol.6 (1), p.33466-33466, Article 33466
Main Authors: Guo, Xianwei, Han, Jiuhui, Liu, Pan, Chen, Luyang, Ito, Yoshikazu, Jian, Zelang, Jin, Tienan, Hirata, Akihiko, Li, Fujun, Fujita, Takeshi, Asao, Naoki, Zhou, Haoshen, Chen, Mingwei
Format: Article
Language:English
Subjects:
639/4077/4079/891
Cathodes
Decomposition
Electrodes
Energy
Gold
Humanities and Social Sciences
Ligaments
Mass transport
Morphology
multidisciplinary
Pore size
Porosity
Porous materials
Science
Surface area
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Summary:High-energy-density rechargeable Li-O 2 batteries are one of few candidates that can meet the demands of electric drive vehicles and other high-energy applications because of the ultra-high theoretical specific energy. However, the practical realization of the high rechargeable capacity is usually limited by the conflicted requirements for porous cathodes in high porosity to store the solid reaction products Li 2 O 2 and large accessible surface area for easy formation and decomposition of Li 2 O 2 . Here we designed a hierarchical and bicontinuous nanoporous structure by introducing secondary nanopores into the ligaments of coarsened nanoporous gold by two-step dealloying. The hierarchical and bicontinuous nanoporous gold cathode provides high porosity, large accessible surface area and sufficient mass transport path for high capacity and long cycling lifetime of Li-O 2 batteries.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep33466