Achieving low overpotential lithium-oxygen batteries by exploiting a new electrolyte based on N, N′-dimethylpropyleneurea

Ruliang Liu, Yu Lei, Wei Yu, Haifan Wang, Lei Qin, Da Han, Wei Yang, Dong Zhou, Yanbing He, Dengyun Zhai, Baohua Li, Feiyu Kang

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Recently, the lithium-oxygen (Li-O2) battery has attracted much interest due to its ultrahigh theoretical energy density. However, its potential application is limited by an unstable electrolyte system, low round-trip efficiency, and poor cyclic performance. In this study, we present a new electrolyte based on N, N′- dimethylpropyleneurea (DMPU) applied for the Li-O2 battery. This electrolyte possesses high ionic conductivity and achieves a low discharge/charge voltage gap of 0.6 V, which is mainly due to the possible one-electron charge transfer mechanism. The introduction of the antioxidant butylatedhydroxytoluene (BHT) as an additive stabilizes the superoxide radical by chemical adsorption and improves the cyclic performance remarkably. Thus, this new electrolyte system may be one of the candidates for Li-O2 batteries.

Original languageEnglish
Pages (from-to)313-318
Number of pages6
JournalACS Energy Letters
Volume2
Issue number2
DOIs
Publication statusPublished - 2017 Feb 10
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry

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