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

Journal Article · · Advanced Materials

Dendrite has puzzled the metal anodes including Li and Zn for rechargeable batteries more than decades of years. Here we bypass this obstacle via adopting non-flammable Trimethyl Phosphate (TMP) safe organic electrolyte to build zinc ion batteries. The graphene-like form Zn deposit was gained via TMP surfactant and Zn3(PO4)2 molecular template. This novel morphology Zn anode demonstrates highly stable and reversible plating/stripping for more than 2000 hours without dendrite, and a remarkably high Coulombic efficiency (CE) of 99.57 %. Addition of Dimethyl Carbonate (DMC) to TMP enhanced the stability of Zn/Zn symmetric cells to over 5000 hours without sacrificing the CE (99.15 %) of Zn deposition/dissolution. Moreover, non-aqueous Zn-VS2 battery delivered a specific capacity of 146.6 mA h g-1 with a capacity retention of 94.38 % over 500 cycles. Excellent anodic stability, high CE and cycling stability of the full cell expands the scope for developing low cost, safe and high performance non-aqueous Zn batteries.

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
OSTI ID:
1571480
Report Number(s):
PNNL-SA-146185
Journal Information:
Advanced Materials, Vol. 31, Issue 36
Country of Publication:
United States
Language:
English

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