A "cation-anion regulation" synergistic anode host for dendrite-free lithium metal batteries

Weidong Zhang, Houlong Zhuang, Lei Fan, Lina Gao, Yingying Lu

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

Dendritic Li deposition has been "a Gordian knot" for almost half a century,which significantly hinders the practical use of high-energy lithiummetal batteries (LMBs). The underlyingmechanisms of this dendrite formation are related to the preferential lithium deposition on the tips of the protuberances of the anode surface and also associated with the concentration gradient or even depletion of anions during cycling. Therefore, a synergistic regulation of cations and anions at the interface is vital to promoting dendrite-free Li anodes. An ingenious molecular structure is designed to realize the "cation-anion regulation" with strong interactions between adsorption sites and ions at the molecular level.A quaternized polyethylene terephthalate interlayerwith a "lithiophilic" ester building block and an "anionphilic" quaternary ammonium functional block can guide ions to form dendrite-free Limetal deposits at an ultrahigh current density of 10 mA cm-2, enabling stable LMBs.

Original languageEnglish (US)
Article numbereaar4410
JournalScience advances
Volume4
Issue number2
DOIs
StatePublished - Feb 23 2018

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Lithium
Anions
Cations
Anodes
Metals
Ions
Polyethylene Terephthalates
Ammonium Compounds
Molecular structure
Esters
Current density
Deposits
Adsorption

ASJC Scopus subject areas

  • General

Cite this

A "cation-anion regulation" synergistic anode host for dendrite-free lithium metal batteries. / Zhang, Weidong; Zhuang, Houlong; Fan, Lei; Gao, Lina; Lu, Yingying.

In: Science advances, Vol. 4, No. 2, eaar4410, 23.02.2018.

Research output: Contribution to journalArticle

Zhang, Weidong ; Zhuang, Houlong ; Fan, Lei ; Gao, Lina ; Lu, Yingying. / A "cation-anion regulation" synergistic anode host for dendrite-free lithium metal batteries. In: Science advances. 2018 ; Vol. 4, No. 2.
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