A Highly Reversible Zn Anode with Intrinsically Safe Organic Electrolyte for Long-Cycle-Life Batteries

Ahmad Naveed; Huijun Yang; Yuyan Shao; Jun Yang; Nuli Yanna; Jun Liu; Siqi Shi; Liwen Zhang; Anjiang Ye; Bing He; Jiulin Wang

doi:10.1002/adma.201900668

A Highly Reversible Zn Anode with Intrinsically Safe Organic Electrolyte for Long-Cycle-Life Batteries

Adv Mater. 2019 Sep;31(36):e1900668. doi: 10.1002/adma.201900668. Epub 2019 Jul 22.

Authors

Ahmad Naveed¹, Huijun Yang¹, Yuyan Shao², Jun Yang¹, Nuli Yanna¹, Jun Liu², Siqi Shi³, Liwen Zhang³, Anjiang Ye⁴, Bing He⁴, Jiulin Wang¹

Affiliations

¹ Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
² Pacific Northwest National Laboratory, Richland, WA, 99354, USA.
³ School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China.
⁴ School of Computer Engineering and Science, Shanghai University, Shanghai, 200444, China.

PMID: 31328835
DOI: 10.1002/adma.201900668

Abstract

Dendrite and interfacial reactions have affected zinc (Zn) metal anodes for rechargeable batteries many years. Here, these obstacles are bypassed via adopting an intrinsically safe trimethyl phosphate (TMP)-based electrolyte to build a stable Zn anode. Along with cycling, pristine Zn foil is gradually converted to a graphene-analogous deposit via TMP surfactant and a Zn phosphate molecular template. This novel Zn anode morphology ensures long-term reversible plating/stripping performance over 5000 h, a rate capability of 5 mA cm^-2 , and a remarkably high Coulombic efficiency (CE) of ≈99.57% without dendrite formation. As a proof-of-concept, a Zn-VS₂ full cell demonstrates an ultralong lifespan, which provides an alternative for electrochemical energy storage devices.

Keywords: Coulombic efficiency; TMP-electrolyte; Zn anodes; dendrite-free; nonaqueous zinc-ion batteries.

Abstract

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