Bifunctional 1-Boc-3-Iodoazetidine Enhancing Lithium Anode Stability and Rechargeability of Lithium-Oxygen Batteries

  • ACS Appl Mater Interfaces. 2021 Apr 14;13(14):16437-16444. doi: 10.1021/acsami.1c02192.
Yan-Ni Li  1  2 ,  Fang-Ling Jiang  1 ,  Zhuang Sun  1 ,  Osamu Yamamoto  3 ,  Nobuyuki Imanishi  3 ,  Tao Zhang  1  2
Affiliations
  • 1. State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, P. R. China.
  • 2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China.
  • 3. Department of Chemistry, Faculty of Engineering, Mie University, 1577 Kurimamachiya-cho, Tsu, Mie 514-8507, Japan.
PMID: 33788529 DOI: 10.1021/acsami.1c02192
Abstract

Lithium anode protection is an effective strategy to prohibit the continuous loss of redox mediators (RMs) resulting from the unfavorable "shuttle effect" in lithium-oxygen batteries. In this work, an in situ Li anode protection method is designed by utilizing an organic compound, 1-Boc-3-iodoazetidine (BIA), as both a RM and an additive, to form a lithium anode protective layer. The reaction between Li metal and BIA can form lithium iodide (LiI) and lithium-based organometallic. LiI can effectively reduce the charging overpotential. Meanwhile, the in situ-formed anode protection layer (lithium-based organometallic) can not only effectively prevent RMs from being reduced by the lithium metal, but also inhibit the growth of lithium dendrites. As a result, the lithium-oxygen battery with BIA shows a long cycle life of 260 cycles with a notably reduced charging potential. In particular, the battery with BIA achieves an excellent lifespan of 160 cycles at a large current density of 2000 mA g-1.

Keywords
1-Boc-3-iodoazetidine; charging overpotential; in situ anode protection layer; lithium-oxygen batteries; redox mediator; shuttle effect.
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