Metal organic framework laden poly(ethylene oxide) based composite electrolytes for all-solid-state Li-S and Li-metal polymer batteries

Suriyakumar, Shruti; Gopi, Sivalingam; Kathiresan, Murugavel; Bose, Suriyasarathi; Gowd, E. Bhoje; Nair, Jijeesh R.; Angulakshmi, Natarajan; Meligrana, Giuseppina; Bella, Federico; Gerbaldi, Claudio; Stephan, A. Manuel

Electrochimica Acta, 2018, vol 285pp. 355-364

DOI:10.1016/j.electacta.2018.08.012

Abstract

In this work, the possibility of employing aluminium terephthalic acid metal organic framework (Al-TPA-MOF)-laden composite polymer membranes as electrolyte for all-solid-state lithium-sulfur (Li-S) and lithium-metal (Li-metal) polymer batteries is explored. The prepared composite polymer electrolytes (CPEs) based on a poly(ethylene oxide) (PEO) network with lithium bis(trifluoromethane)sulfonimide (LiTFSI) and Al-TPA-MOF are mechanically robust and thermally stable up to 270 °C, and provide appreciable ionic conductivity in the order of 0.1 mS cm−1 at 60 °C. The enhanced compatibility of CPEs with the lithium metal anode is attributed to the scavenging effect of Al-TPA-MOF. Laboratory scale all-solid-state Li-S and Li-metal polymer cells are assembled, which deliver specific capacities exceeding 800 and 130 mAh g−1, respectively, and a stable performance upon prolonged cycling even at 60 °C, which is superior to earlier reports on similar systems.

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