Solid State Electrolytes for Lithium Ion Batteries

Battery with improved energy density and cycle life by using a multi-layer structure with a thin solid electrolyte layer sandwiched between the positive and negative electrode layers. The solid electrolyte layer allows for higher solid electrolyte content without compromising the energy density. The thin solid electrolyte layer also improves the cycle life by reducing solid electrolyte degradation compared to a single-layer structure.

Source

All-solid-state battery with improved performance and safety compared to traditional lithium-ion batteries. The battery uses a solid electrolyte made of composite glass ceramics. The composite electrolyte has two components, a first glass ceramic compound and a second glass ceramic compound. This composite electrolyte provides high ionic conductivity and low electronic conductivity at lower sintering temperatures compared to conventional solid electrolytes. The lower temperature sintering reduces density differences between the electrode active materials and the electrolyte. This improves battery efficiency and reduces risks of internal short circuits.

Source

A solid-state electrolyte for lithium batteries that can provide high ionic conductivity at low temperatures without the need for large amounts of flammable solvents. The electrolyte is a compound of formula (I) containing lithium, an organic fluorinated ether, and optionally other organic groups. The ether provides solvation for the lithium cation, enhancing conductivity. The compound can be used as a solid electrolyte in batteries without adding excessive solvent. It can also be used as an anode protection layer in metal batteries to prevent dendrite growth. The compound can be prepared by reaction of lithium fluoride, an organic fluorinated ether, and optionally other organic groups.

Source

All-solid-state battery design that increases capacity while keeping volume constant. The battery has a laminate structure with alternating anode, cathode, and solid electrolyte layers stacked between facing surfaces. Margins are added around the edges of the laminate to provide additional volume. This allows increasing the total battery capacity by adding layers without significantly increasing the overall volume.

Source

Solid-state battery with reduced resistance increase over time. The battery has a specific order and moisture content of the positive electrode, solid electrolyte, and negative electrode layers. The positive electrode layer has a moisture content with a specific amount of physisorbed water relative to the total moisture content. This configuration helps prevent resistance increase by minimizing moisture migration during cycling. The layers are laminated using a method that transfers the layers onto each other without removing the base materials in between. This prevents moisture loss during lamination.

Source

An all-solid-state battery design with uniform lithium deposition and improved durability for high energy density batteries. The battery has a functional layer between the anode current collector and solid electrolyte. The functional layer contains materials that alloy or compound with lithium. It has two interfacial layers, one between the functional layer and solid electrolyte, and one between the functional layer and anode current collector. The key is adjusting the binding force ratio between these interfacial layers to be 0.6 or higher. This prevents lithium from concentrating at edges or between layers, allowing uniform lithium deposition on the anode current collector during charging.

Source

Solid electrolyte for lithium air batteries with improved stability in humid and alkaline conditions. The solid electrolyte has a bilayer structure with an inner layer of lithium ion conductor and an outer layer made of a compound stable in moisture and strong bases like lithium hydroxide. This protects the inner layer from degradation during charging/discharging. The outer layer prevents metal ion dissolution and cracking in alkaline environments. The bilayer electrolyte maintains ion conductivity after exposure to saturated lithium hydroxide solution.

Source

A non-flammable and mechanically flexible solid-state electrolyte material for lithium-ion batteries that provides high ionic conductivity without the safety issues of flammable liquid electrolytes. The electrolyte is a composite of cubic phase, bismuth-doped lithium lanthanum zirconium oxide (LLZBO) meso-particles embedded in a poly (ethylene oxide) (PEO) membrane. The composite electrolyte has ionic conductivity values up to 10^-4 S/cm at room temperature, which is significantly higher than conventional solid electrolytes. The high conductivity is attributed to the cubic LLZBO particles, low particle size, and optimal particle loading in the PEO matrix.

Source

Battery design to improve performance and prevent delamination of stacked solid electrolyte layers. The battery has three different solid electrolyte layers between the positive, negative, and electrolyte electrodes. The middle layer has a solid electrolyte material with a lower Young's modulus than the outer layers. This intermediate layer improves adhesion between the different types of solid electrolyte materials and prevents delamination. The lower modulus material reduces residual stress between layers when compressed during battery assembly.

Source

Bipolar solid-state battery design with integrated self-heating capability for improved power density. The battery has electrodes with thicknesses over 100 microns on metal foam current collectors. Between the electrodes is a solid-state electrolyte layer. External electrothermal foils with resistors are attached to the current collectors. In the open position, electrons flow through the foils to heat the battery during cycling. In the closed position, electrons flow through the collectors for normal operation. The self-heating allows cycling at lower temperatures for better performance.

Source

Cathode and method for all-solid-state batteries with reduced internal resistance. The cathode contains composite active material particles and solid electrolyte particles. The composite particles have a peroxo complex on their surface, which converts to a lithium ion conducting oxide during sintering. This oxide coating prevents oxidation of the active material and electrolyte during cycling, reducing battery resistance. The method involves preparing the composite particles by drying a peroxo solution on the active material surface, then forming the cathode layer.

Source

Solid electrolyte precursor, solid electrolyte, and method for preparing the solid electrolyte for oxide-based lithium batteries with reduced sintering temperatures. The precursor is amorphous with >50% volume of amorphous phase, and contains a compound represented by formula 1. It forms a crystalline solid electrolyte at low temperatures, like 600°C, compared to conventional garnet oxide electrolytes which require >900°C. This allows easier synthesis and lower interface formation in battery assembly.

Source

Generative design workflow for discovering and optimizing solid-state battery electrolyte materials with high ionic conductivity. The workflow involves training machine learning models to predict ionic conductivity using molecular dynamics simulations and density functional theory calculations. The models are trained using atomic structures and energies from known materials. The trained models are then used to generate new candidate materials with high ionic conductivity. The models can also predict conductivity for new materials without full DFT calculations. This accelerates electrolyte material discovery and optimization compared to traditional methods.

Source

All-solid-state battery electrode design with improved output characteristics by optimizing the conductive network in the electrode. The electrode contains an electrode active material, solid electrolyte, and conductive assistant particles. The conductive assistant particles have specific size, shape, and spacing properties in the electrode to enhance conductivity while limiting particle amount. The particles have average aspect ratio ≥1.5, inter-particle distance ≤ particle length, and average inter-particle distance ≤ 1.22 * particle size * (2/3) * particle aspect ratio. This creates a favorable conductive network without excessive particle reduction of active material or electrolyte.

Source

A solid electrolyte composition for use in solid-state lithium-ion batteries that provides high ionic conductivity and processability. The electrolyte has a unique formula of Li5+zP3S10Xz, where z is 0-5 and X is a halogen. The electrolyte can be made by mixing lithium sulfide, phosphorus sulfide, sulfur, and a halogen compound like lithium chloride in a solvent. The resulting electrolyte has specific XRD peaks at 15.4°, 27.6°, 30.9°, and 33.3°. This composition provides a solid electrolyte with high ionic conductivity for solid-state lithium-ion batteries.

Source

A solid electrolyte for all-solid-state batteries with improved ion conductivity and cycle performance. The solid electrolyte has a composition of LiM2(PO4)z with 3.001 <= z <= 3.200. The range of PO4 content improves the ionic conductivity compared to traditional NASICON electrolytes. The all-solid-state battery uses this high-conductivity electrolyte between the positive and negative electrodes.

Source

Solid electrolyte for lithium-ion batteries with improved performance for high-voltage applications. The solid electrolyte contains a garnet-type composite metal oxide phase with lithium, lanthanum, zirconium, oxygen, and gallium. A part of the lithium sites in the garnet phase are substituted with gallium. The electrolyte also has a separate phase containing compounds like LiF, BaZrO3, YF3, SrF2, or ScF3. This composition and the mechanochemical synthesis method improves the lithium ion conductivity of the solid electrolyte.

Source

Solid-state lithium battery electrolyte material with high ionic conductivity, compatibility with high voltage cathodes, and low resistance with lithium metal anodes. The electrolyte is a crystalline Argyrodite-type solid electrolyte composition containing Li, P, halogens (or pseudo-halogens like BH4), and sulfur, selenium, or nitrogen. It has peaks at 14.6°, 15.3°, and 25.1° in X-ray diffraction. The composition can have glass ceramic and mixed crystalline phases. The high ionic conductivity is attributed to the cubic Argyrodite structure with a halogen or pseudo-halogen level approaching y=2 in Li7-yPS6-yXy.

Source

Doped phosphorus-sulfur iodide solid electrolyte for lithium-ion batteries with improved ionic conductivity for facilitating lithium ion transport. The doped electrolyte expands the ion transport channel by doping W and/or Mo elements with larger ionic radius. This increases the quantity of transport channels between cages, facilitating lithium ion transport. The doped electrolyte has an ionic conductivity of more than or equal to 1.0×10−3 S/cm and a wide electrochemical stability window. The doping improves the solid electrolyte's performance compared to undoped Li6PS5I.

Source

Abstract Composite electrolytes have received widespread attention due to their potential simultaneously integrate the advantages of different types electrolytes. However, composite based on sulfides and polymers electrolyte still face issues such as instability toward lithium metal, low ion transference number, between sulfides. Based this, a continuous conductive Li 5.4 PS 4.4 Cl 1.6 (LPSC) framework with polytetrafluoroethylene (PTFE) is prepared binder (LPSC@PTFE) gel containing high concentration salt. The fills pores in LPSC@PTFE membrane protects interface sulfide metal. In addition, highconcentration exhibit better stability compared lowconcentration electrolytes, whether for metal or improvement has been demonstrated through analysis insitu electrochemical impedance spectroscopy (EIS) combined relaxation time distribution (DRT), well characterization by Xray photoelectron (XPS) Raman spectroscopy. mechanism behind performance enhancement theoretical calculations simulations also speculated on. optimized an window 4.98 V, increased number 0.74, critical current de... Read More

Source