A dopamine modified Li_6.4La₃Zr_1.4Ta_0.6O₁₂/PEO solid-state electrolyte: enhanced thermal and electrochemical properties

Abstract

A garnet-type solid-state electrolyte Li6.4La3Zr1.4Ta0.6O12 (LLZTO) was modified using dopamine to improve the wettability of LLZTO with PEO, allowing 80 wt% LLZTO to be uniformly dispersed in 20 wt% PEO/LiTFSI polymer electrolyte.

X-ray pair distribution function analysis and electrical and electrochemical properties of cerium doped Li5La3Nb2O12 garnet solid-state electrolyte

“…41,42 Another common strategy in this field is to utilise polymer-ceramic composite electrolytes, which combine good wetting properties of polymer electrolytes with the high ionic conductivity of ceramic electrolytes, forming a uniform interfacial contact with decreased interfacial resistance. [43][44][45] Ce 3+ or Ce 4+ incorporation on La 3+ site in Li 7 La 3 Zr(Hf) 2 O 12 has been previously studied albeit showing a limited solid solution range for this site substitution, before the detection of impurity phases. 46,47 In contrast, we showed in a previous study, that there was a greater degree of Ce 4+ substitution possible on the Zr 4+ site in Li 7 La 3 Zr 2 O 12 leading to a reduction in the tetragonal distortion, which consequently increased the ionic conductivity, although due to the stoichiometric Li content in this system, the room temperature conductivity was just below the value of 10 −4 S cm −1 , which is considered the minimum for applications.…”

Solvent‐Free Synthesis of Thin, Flexible, Nonflammable Garnet‐Based Composite Solid Electrolyte for All‐Solid‐State Lithium Batteries

“…Composite solid electrolytes developed by the integration of high content of ceramic component (>50 wt%) have been regarded as a promising candidate for high‐safety all‐solid‐state lithium batteries due to their excellent electrochemical performance and thermal stabilities 24–26. The composite solid electrolyte consisting of ceramic powders or fibers as fillers in polymer matrix has achieved higher ionic conductivity, wider electrochemical window, and higher lithium transference number compared to single‐component polymer electrolytes 19,27–35.…”

A polycarboxylic/ether composite polymer electrolyte via in situ UV-curing for all-solid-state lithium battery

“…Sun and co-workers [17] reported the poly(ethylene glycol)-poly(etheramine)-based interpenetrating network polymer electrolyte. The electrolyte shows an ionic conductivity of 5.6 × 10 −5 and 1.1 × 10 −3 S cm −1 at 25 and 100°C, and makes the LiFePO 4 lithium metal batteries present an initial discharge capacity of 156.2 mA h g −1 and stable cycling performance over 200 cycles at 0.1 C. Li and co-workers [18]. reported a PEO-based solid-state electrolyte composited with polydopamine (PDA)-coated Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 nanoparticles The SSE shows a conductivity of 1.1×10 −4 S cm −1 at 30°C and good compatibility adhesion with both positive and negative electrodes.…”