Composite lithium electrode with mesoscale skeleton via simple mechanical deformation

Zheng Liang, Kai Yan, Guangmin Zhou, Allen Pei, Jie Zhao, Yongming Sun, Jin Xie, Yanbin Li, Feifei Shi, Yayuan Liu, Dingchang Lin, Kai Liu, Hansen Wang, Hongxia Wang, Yingying Lu, Yi Cui

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

Lithium metal–based batteries are attractive energy storage devices because of high energy density. However, uncontrolled dendrite growth and virtually infinite volume change, which cause performance fading and safety concerns, have limited their applications. Here, we demonstrate that a composite lithium metal electrode with an ion-conducting mesoscale skeleton can improve electrochemical performance by locally reducing the current density. In addition, the potential for short-circuiting is largely alleviated due to side deposition of mossy lithium on the three-dimensional electroactive surface of the composite electrode. Moreover, the electrode volume only slightly changes with the support of a rigid and stable scaffold. Therefore, this mesoscale composite electrode can cycle stably for 200 cycles with low polarization under a high areal current density up to 5 mA/cm 2 . Most attractively, the proposed fabrication process, which only involves simple mechanical deformation, is scalable and cost effective, providing a new strategy for developing high performance and long lifespan lithium anodes.

Original languageEnglish (US)
Article numbereaau5655
JournalScience Advances
Volume5
Issue number3
DOIs
StatePublished - 2019

All Science Journal Classification (ASJC) codes

  • General

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