title: α-MnO2 nanowire catalysts with ultra-high capacity and extremely low overpotential in lithium-air batteries through tailored surface arrangement.
abstract: We here report on very high capacity (11,000 mA h g(-1)), superb rate capability (4500 mA h g(-1) at 5000 mA g(-1)) and high reversibility of Li-air batteries using α-MnO2 NW catalysts mainly associated with their relatively large amount of Mn(3+) exposed on the NW surface and a unique mechanism for deposition of discharge products. Our findings of the unprecedentedly fast Li ion transport and reversible formation-decomposition of discharge products attributed to the modified surface arrangement of α-MnO2 NWs suggest a strategy for achieving high-power Li-air batteries in combination with nano-architecture tailoring.
authors.affiliation: Department of Energy, Materials Engineering, Dongguk University-Seoul, Seoul 100-715, Republic of Korea. dake1234@dongguk.edu.
authors.forename: Kyeongse
authors.initials: K
authors.lastname: Song
authors.forename: Jaepyeong
authors.initials: J
authors.lastname: Jung
authors.forename: Yoon-Uk
authors.initials: YU
authors.lastname: Heo
authors.forename: Yoon Cheol
authors.initials: YC
authors.lastname: Lee
authors.forename: Kyeongjae
authors.initials: K
authors.lastname: Cho
authors.forename: Yong-Mook
authors.initials: YM
authors.lastname: Kang