Events

Past events

OCT 10 2019

CIC energiGUNE seminar "Beyond safety improvement: novel polymer electrolytes for advanced alkali metal-based batteries"

Speaker: Dr. Dong Zhou

From: Centre for Clean Energy Technology, School of Mathematical and Physical Sciences, University of Technology Sydney, Sydney (Australia) 

The evolution trend of alkali metal-based batteries is from liquid-state to solid-state with energy density and safety merits. As a result, polymer electrolytes have attracted great interest due to their safety assurance and unique application benefits.[1] We have developed a stable dual-ion sodium metal battery by employing a multifunctional gel polymer electrolyte. The polymer electrolyte not only exhibited high resistance against oxidation and constructed thin and stable protective layers on the electrode surfaces, but also facilitated homogeneous cation/anion fluxes and suppressed the sodium dendrite growth. The as-developed dual-ion batteries exhibited high capacity with long cycling stability, and highly reversible electrochemical behavior at current densities.[2]Furthermore, we designed a hierarchical multifunctional polymer electrolyte for lithium metal batteries, which simultaneously possessed high ionic conductivity high ionic conductivity (2.24 × 10-3 S cm-1 at 25 °C), near-single ion conducting behavior (lithium ion transference number of 0.75), good mechanical strength and remarkable suppression for lithium dendrite growth.[3] We also successfully applied polymer electrolytes in conversion chemistry-based alkali metal batteries, such as lithium-iodine batteries[4] and room-temperature sodium-sulfur batteries[5], since polymer electrolytes can effectively suppress the shuttling of soluble intermediate products (polysulfides and iodine species, etc.). Considering the rapidly growing academic and industrial interests in developing polymer electrolytes and solid-state alkali metal-based batteries, it is reasonable to expect important breakthroughs in the near future.

References:

[1] D. Zhou, Chem, 2019, 10.1016/j.chempr.2019.05.009.

[2] X. Xu, D. Zhou, B. Li, G. Wang, et al. under review.

[3] D. Zhou, M. Armand, G. Wang, et al. Angew. Chem. Int. Ed., 2019, 131, 6062-6067.

[4] X. Tang, D. Zhou, B. Li, G. Wang, et al. ACS Cent. Sci., 2019, 5, 365-373.

[5] X. Xu, D. Zhou, B. Li, . Rojo, M. Armand, G. Wang, et al. Nat. Commun., 2018, 9, 3870; D. Zhou, B. Li, T. Rojo, M. Armand, G. Wang, et al. , 2018, 57, 10168-10172.

  • Area: Power storage; Batteries and Supercaps
  • Ending data: 10.10.2019
  • Place: CIC energiGUNE, seminar room

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