Improved Li–S Battery Performance with Dispersant/Plasticizer Co-Assisted Modification of a Poly(ethylene Oxide)/Li6.4La3Zr1.4Ta0.6O12 Solid Electrolyte

• DOI: 10.1021/acsami.5c00987
• Publication Date: 2025-05-19T05:28:21Z
• Authors: Ai-Yin Wang; Chun-Han Kuo; Yi-Chen Weng; Hao-Yu Liu; Chien-Hao Yeh; Yen-Lin Chen; Shu-Yu Chen; Hui-Ching Chien; Han-Yi Chen
• Keywords: Plasticizer; Poly ethylene

Lithium-sulfur batteries (LSBs) have garnered considerable attention over the past decade due to their high specific capacity and energy density. However, poor safety polysulfide shuttle phenomenon associated with liquid LSBs been widely criticized. Solid-state electrolytes potential overcome these issues, but lower ionic conductivity nonideal electrode/electrolyte interface contact as compared remain a challenge in all-solid-state (ASSLSBs). This study applies untested method of introducing combination dispersant plasticizer "co-assisted" additive. We develop polymer/ceramic composite electrolyte by combining poly(ethylene oxide)s, Li6.4La3Zr1.4Ta0.6O12 ceramic powder, pluronic (C3H6O·C2H4O)x (F127), succinonitrile (C2H4(CN)2) (SN). The F127 effectively prevents aggregation powders, whereas SN reduces crystallinity polymer decreases impedance, thereby enhancing overall ion conductivity. resulting exhibits an 1.24 × 10-4 S cm-1 at room temperature, when coupled commercial sulfur electrode, 1085 mA h g-1 is achieved. In addition, demonstrate retention 71% after 100 cycles current density 0.2 C demonstrating promise for ASSLSB applications.