title: Hierarchical nanoporosity enhanced reversible capacity of bicontinuous nanoporous metal based Li-O2 battery.
abstract: High-energy-density rechargeable Li-O2 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 Li2O2 and large accessible surface area for easy formation and decomposition of Li2O2. 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-O2 batteries.
authors.affiliation: WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.|CREST, Japan Science and Technology Agency (JST), Saitama 332-0012, Japan.
authors.forename: Xianwei
authors.initials: X
authors.lastname: Guo
authors.affiliation: WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
authors.forename: Jiuhui
authors.initials: J
authors.lastname: Han
authors.affiliation: WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.|CREST, Japan Science and Technology Agency (JST), Saitama 332-0012, Japan.
authors.forename: Pan
authors.initials: P
authors.lastname: Liu
authors.affiliation: WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
authors.forename: Luyang
authors.initials: L
authors.lastname: Chen
authors.affiliation: WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.|CREST, Japan Science and Technology Agency (JST), Saitama 332-0012, Japan.
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Ito
authors.affiliation: Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Umezono 1-1-1, Tsukuba, 305-8568, Japan.
authors.forename: Zelang
authors.initials: Z
authors.lastname: Jian
authors.affiliation: WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
authors.forename: Tienan
authors.initials: T
authors.lastname: Jin
authors.affiliation: WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.|CREST, Japan Science and Technology Agency (JST), Saitama 332-0012, Japan.
authors.forename: Akihiko
authors.initials: A
authors.lastname: Hirata
authors.affiliation: Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Umezono 1-1-1, Tsukuba, 305-8568, Japan.
authors.forename: Fujun
authors.initials: F
authors.lastname: Li
authors.affiliation: WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Fujita
authors.affiliation: WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.
authors.forename: Naoki
authors.initials: N
authors.lastname: Asao
authors.affiliation: Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Umezono 1-1-1, Tsukuba, 305-8568, Japan.
authors.forename: Haoshen
authors.initials: H
authors.lastname: Zhou
authors.affiliation: WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan.|CREST, Japan Science and Technology Agency (JST), Saitama 332-0012, Japan.|State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, PR China.
authors.forename: Mingwei
authors.initials: M
authors.lastname: Chen