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.
Revised: July 16, 2020 |
Published: September 6, 2019
Citation
Naveed A., H. Yang, Y. Shao, J. Yang, N. Yanna, J. Liu, and S. Shi, et al. 2019.A Highly Reversible Zn Anode with Intrinsically Safe Organic Electrolyte for Long-Cycle-Life Batteries.Advanced Materials 31, no. 36:Article No. 1900668.PNNL-SA-146185.doi:10.1002/adma.201900668