Synthesis and Electrochemical Properties of I4̅-Type Li1+2xZn1–xPS4 Solid Electrolyte
| Autor: | William D. Richards, Tomoyuki Tsujimura, Gerbrand Ceder, Naoki Suzuki, Lincoln J. Miara, Jae Chul Kim, Yan Wang, In-Sun Jung |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
General Chemical Engineering Analytical chemistry chemistry.chemical_element 02 engineering and technology General Chemistry Crystal structure Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Amorphous solid symbols.namesake chemistry Materials Chemistry symbols Ionic conductivity Graphite 0210 nano-technology Raman spectroscopy Indium |
| Zdroj: | Chemistry of Materials. 30:2236-2244 |
| ISSN: | 1520-5002 0897-4756 |
| DOI: | 10.1021/acs.chemmater.7b03833 |
| Popis: | I4-type LiZnPS4 solid electrolyte was synthesized starting from Li2S, P2S5, and ZnS, and its room temperature ionic conductivity, σ25°C, was ∼10–8 S/cm. To improve σ25°C, compositions of Li1+2xZn1–xPS4 (x = 0.125, 0.25, 0.375, 0.5, 0.625, 0.75, 0.8, 0.9) were synthesized from mixtures of LiZnPS4 and amorphous Li3PS4 (a-LPS). The samples with x ≤ 0.8 were confirmed by means of XRD and Raman spectroscopy to have the I4 structure. The maximum σ25°C was 5.7 × 10–4 S/cm at x = 0.625. NMR measurement revealed that Li1+2xZn1–xPS4 (x ≤ 0.625) is almost a single phase material and not a simple mixture of LiZnPS4 and a-LPS, confirming that its crystal structure is responsible for the improved ionic conductivity. Li2.25Zn0.375PS4 (x = 0.625) was reactive to graphite and indium anodes but stable against a Li4Ti5O12 anode and a 4 V class cathode. We fabricated an all-solid-state battery in the form of graphite|a-LPS|Li2.25Zn0.375PS4|Li2O-ZrO2 coated Li(Ni, Mn, Co)O2 and examined its performance. It showed a first-cy... |
| Databáze: | OpenAIRE |
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