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From O2- to HO2- : Reducing By-Products and Overpotential in Li-O2 Batteries by Water Addition.
Qiao, Yu; Wu, Shichao; Yi, Jin; Sun, Yang; Guo, Shaohua; Yang, Sixie; He, Ping; Zhou, Haoshen.
Afiliação
  • Qiao Y; Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Umezono, Tsukuba, 305-8568, Japan.
  • Wu S; Graduate School of System and Information Engineering, University of Tsukuba, 1-1-1, Tennoudai, Tsukuba, 305-8573, Japan.
  • Yi J; Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Umezono, Tsukuba, 305-8568, Japan.
  • Sun Y; Graduate School of System and Information Engineering, University of Tsukuba, 1-1-1, Tennoudai, Tsukuba, 305-8573, Japan.
  • Guo S; Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Umezono, Tsukuba, 305-8568, Japan.
  • Yang S; Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Umezono, Tsukuba, 305-8568, Japan.
  • He P; Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Umezono, Tsukuba, 305-8568, Japan.
  • Zhou H; National Laboratory of Solid State Microstructures & Department of Energy Science and Engineering, Nanjing University, Nanjing, 210093, P.R. China.
Angew Chem Int Ed Engl ; 56(18): 4960-4964, 2017 04 24.
Article em En | MEDLINE | ID: mdl-28370876
The development of aprotic Li-O2 batteries, which are promising candidates for high gravimetric energy storage devices, is severely limited by superoxide-related parasitic reactions and large voltage hysteresis. The fundamental reaction pathway of the aprotic Li-O2 battery can be altered by the addition of water, which changes the discharge intermediate from superoxide (O2- ) to hydroperoxide (HO2- ). The new mechanism involving HO2- intermediate realizes the two-electron transfer through a single step, which significantly suppresses the superoxide-related side reactions. Moreover, addition of water also triggers a solution-based pathway that effectively reduces the voltage hysteresis. These discoveries offer a possible solution for desirable Li-O2 batteries free of aggressive superoxide species, highlighting the design strategy of modifying the reaction pathway for Li-O2 electrochemistry.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Angew Chem Int Ed Engl Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Japão

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Angew Chem Int Ed Engl Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Japão