Enhancing interfacial stability in lithium orthosilicate/polymer blended novel hybrid solid-state electrolytes for all-solid-state lithium metal batteries
Year: 2024
Type: article
Abstract: Hybrid solid-state electrolyte (HSSE) is a key component for the advancement of all-solid-state lithium metal batteries . The key challenges with the existing HSSEs are to ensure high ionic conductivity , activate dead inorganic/organic interface, and stimulate interfacial stability with electrodes. In this study, a novel HSSE is fabricated by integration of appropriately engineered end-of-life photovoltaic recycled high purity silicon derived nano size inorganic lithium orthosilicate and poly (vinylidene fluoride-co-hexafluoropropylene) polymer matrix through entrapping ionic liquid electrolytes. The obtained lithium orthosilicate-polymer blended HSSE is self-standing, soft, and flexible which delivers a low activation energy , leading a high ionic conductivity of 4.4 × 10 −4 Scm −1 . A critical lithium plating/stripping behaviour shows improved interfacial stability (both inorganic/organic interface and interfaces of HSSE/electrodes) under different current densities (0.05 mA cm −2 to 0.13 mA cm −2 ) when a drop of ionic liquid electrolyte is added, permitting cycling of an all-solid-state full cell (Li/HSSE/LiFePO 4 ) at room temperature with high capacity (132 mAh g −1 ), stable cycle life and high Coulombic efficiency (initial ∼98 %; subsequent >99.5 %). Shaping the interfaces between inorganic/organic phases in the HSSE as well as the interfaces between electrodes/HSSE appears to be a workable path towards constructing very effective HSSE for the advancement of all-solid-state lithium metal batteries .
Source: Journal of Power Sources
Institution: Deakin University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,110
OpenAlex ID: W4402183904