Achieving high performance for aluminum stabilized Li ₇ La ₃ Zr ₂ O ₁₂ solid electrolytes for all solid‐state Li‐ion batteries: A thermodynamic point of view

Abstract

Summary For the solid‐state reaction synthesis of Al containing Li7La3Zr2O12, various precursors have been used. Since there is a lack of general agreement for choosing precursors, a quantitative approach to build a consensus is required. In this study, a thermodynamic point of view for selecting the precursors in the field of Li7La3Zr2O12 synthesis was covered according to the Gibbs free energy and enthalpy change of precursors' decomposition reactions. In terms of Gibbs free energy change calculations, LiOH, La(OH)3, and Al(OH)3 were favorable whereas, LiOH, La2O3, and Al(OH)3 were the preferred precursors for the enthalpy change calculations. Pellets prepared by using the favored precursors calculated from enthalpy change showed improved densification, higher ionic conductivity (2.11 × 10−4 S/cm), and lower activation energy (0.23 eV) compared with Gibbs free energy change. As a thermodynamically favored aluminum precursor, Al(OH)3 was discussed in the present study and hinders the ionic conductivity in comparison to Al2O3.

High‐performance solid PEO/PPC/LLTO‐nanowires polymer composite electrolyte for solid‐state lithium battery

“…Recently, SPE membranes had high application prospects in many solid electrochemical energy storage devices, such as rechargeable cells, fuel cells, and supercapacitors, which were potential and most promising candidates . The electrolyte films had favorable material properties, including flexibility and plasticity, mechanical stability, thermal stability and simple processing strategy, solvent free conditions, electrochemical stability, which was propitious to manufacture the devices of ideal size or shape with intimate electrode/electrolyte contact, longer charge cycle, and wider operating temperature range …”

“…7 The electrolyte films had favorable material properties, including flexibility and plasticity, mechanical stability, thermal stability and simple processing strategy, solvent free conditions, electrochemical stability, which was propitious to manufacture the devices of ideal size or shape with intimate electrode/electrolyte contact, longer charge cycle, and wider operating temperature range. 8,9 In recent years, several SPEs with high ionic conducting property based on poly (ethylene oxide) (PEO), poly (methyl methacrylate) (PMMA), polyacrylonitrile (PAN), and poly (vinylidene fluoridehexaflour propylene) (PVDF-HFP) had been reported. [10][11][12][13][14][15] Especially, because of their (the ether chains) strong interactions with lithium ions and the unique ionic conducting characteristics, much attention had been devoted to SPE based on PEO.…”

A novel organic/inorganic composite solid electrolyte with functionalized layers for improved room‐temperature rate performance of solid‐state lithium battery

“…[5][6][7][8] Compared with inorganic SE and polymer SE, organic/inorganic composite solid electrolyte (CSE) is expected to be the preferred electrolyte material for high-performance Li-ion SEs. [9][10][11][12][13] Organic/inorganic CSE combines the advantages of inorganic and organic components and synergistically improves the mechanical and electrochemical performance and provides good interface compatibility. [14][15][16] To improve the comprehensive electrochemical performance of the electrolyte, researchers have focused on the addition of various inorganic fillers to polymer electrolytes.…”

A novel titania nanorods‐filled composite solid electrolyte with improved room temperature performance for solid‐state Li‐ion battery

“…The difference of solid‐state battery (SSB) and traditional liquid‐state lithium battery is the electrolyte. Solid electrolytes (SEs) are divided into inorganic type and polymer type . Among them, inorganic electrolyte has high safety performance and good temperature adaptability; however, it is not easy to produce on a commercial scale because the fabricating process of solid electrolyte is complex and the prepared electrolyte sheets are thick and fragile .…”

“…Solid electrolytes (SEs) are divided into inorganic type and polymer type. 4,5 Among them, inorganic electrolyte has high safety performance and good temperature adaptability; however, it is not easy to produce on a commercial scale because the fabricating process of solid electrolyte is complex and the prepared electrolyte sheets are thick and fragile. 2,6 Instead, polymer electrolyte has excellent safety performance and flexible processing features; however, the RT electrochemical performance and mechanical properties are limited by the material attribute itself.…”