Toyota Motor Europe

Toyota Jidosha Kabushiki Kaisha

Yuki Katoh

Keita Komiyama

Geoffroy Hautier

Yaroslav Filinchuk

Anna Miglio

Yuya Ishihara

Jun Yoshida

Davide Di Stefano

Davide Distefano

A method () for producing a sintered component being a solid electrolyte and/or an electrode including titanium and sulfur for an all-solid state battery, the method including mixing powders () so as to obtain a powder mixture comprising titanium and sulfur, pressing () a component with the powder mixture, sintering () the component under a partial pressure of sulfur comprised between 200 Pa and 0.2 MPa so as to obtain an intermediate sintered component comprising titanium and sulfur, and sintering () the intermediate sintered component under a partial pressure of sulfur equal to or smaller than 150 Pa at a temperature plateau comprised between 200° C. and 400° C. so as to obtain a sintered component comprising titanium and sulfur, the solid electrolyte exhibiting the peaks in positions of 2θ=15.08° (±0.50°), 15.28° (±0.50°), 15.92° (±0.50°), 17.5° (±0.50°), 18.24° (±0.50°), 20.30° (±0.50°), 23.44° (±0.50°), 24.48° (±0.50°), and 26.66° (±0.50°) in a X-ray diffraction measurement using CuKα line.

Method for producing electrodes for all-solid state batteries

A solid electrolyte material for a solid state battery () having the following chemical formula XM(PS), where P is phosphorus, S is sulfur and X is lithium (Li), sodium (Na), silver (Ag) or magnesium (Mg) and M is titanium (Ti), zirconium (Zr), germanium (Ge), silicon (Si), tin (Sn) or a mixture of X and aluminium (X+Al) and exhibiting peaks in positions of 2θ=13,64° (±1°), 16,48° (±1°) and 22,18° (±1°) in a X-ray diffraction measurement using CuKα line, where Iis the intensity in arbitrary units of the peak at 13,64° (±1°) and Iis the intensity in arbitrary units of a peak at 23,34° (±1°), (I−I)/(I+I)>0. The disclosure is also related to a solid electrolyte comprising the solid electrolyte material and a solid state battery comprising the solid electrolyte.

Solid electrolyte material for solid state batteries, solid electrolyte and solid state battery

A method for producing a solid electrolyte for an all-solid state battery, the solid electrolyte having the following chemical formula XM(PS), where X is lithium (Li), sodium (Na), silver (Ag) or magnesium (Mg) and M is titanium (Ti), zirconium (Zr), germanium (Ge), silicon (Si), tin (Sn) or a mixture of X and aluminium (X+Al) and the method including: mixing powders so as to obtain a powder mixture; pressing a component with powder mixture; and sintering component for a period of time equal to or greater than 100 hours so as to obtain the solid electrolyte. The solid electrolyte exhibits the peaks in positions of 2θ=13.64° (±1°), 13.76° (±1°), 14.72° (±1°), 15.36° (±1°), 15.90° (±1°), 16.48° (±1°), 17.42° (±1°), 17.56° (±1°), 18.58° (±1°), and 22.18° (±1°) in a X-ray diffraction measurement using CuKα line. The disclosure is also related to a method of producing a solid electrolyte.

Method for producing a solid electrolyte material and a solid electrolyte for solid state batteries

A control device for controlling charging of a rechargeable battery, the control device including a rechargeable dummy cell, a first circuit configured to charge the battery and the dummy cell, and a second circuit configured to measure the open circuit voltage of the dummy cell. The control device is configured to: determine the open circuit voltage of the dummy cell by using the second circuit, and determine the maximum capacity increment of the battery, which is to be charged until full charging, based on the determined open circuit voltage of the dummy cell. Also, a corresponding method of controlling charging of a rechargeable battery.

Control device and method for charging a rechargeable battery

The present invention relates to a compound represented by the general formula LiMZS, wherein 0.3&#x2264;x&#x2264;0.9; wherein M is one or more elements selected from the group consisting of Pb, Mg, Ca, Ge and Sn; and wherein Z is one or more elements selected from the group consisting of Ge, Si, Sn and Al. The present invention also relates to a method for preparing the material of the present invention, comprising the steps of: In still another aspect, the present invention relates to a use of the compound of the present invention as a solid electrolyte, in particular in an all solid-state lithium battery.

Lithium mixed metal sulfide with high ionic conductivity

A control device for controlling discharging of a rechargeable battery, the control device being configured to: determine the voltage of the battery during discharging of the battery, stop discharging, when the determined voltage falls below a first predetermined lower voltage limit, determine the voltage of the battery after stopping discharging, determine the voltage difference between the first predetermined lower voltage limit and the determined voltage of the battery after stopping discharging, and continue discharging, when the determined voltage difference exceeds a predetermined threshold. A corresponding method controls discharging of a rechargeable battery.

Control device and method for discharging a rechargeable battery

A control device for controlling discharging of a rechargeable battery, the control device comprising a rechargeable dummy cell, a first circuit configured to discharge the battery and the dummy cell, and a second circuit configured to measure the open circuit voltage of the dummy cell. The control device is configured to: determine the open circuit voltage of the dummy cell by using the second circuit, and determine the maximum capacity decrement of the battery, which is to be discharged until full discharging, based on the determined open circuit voltage of the dummy cell. The invention also refers to a corresponding method of controlling discharging of a rechargeable battery.

A method of synthesis of lithium titanium thiophosphate LiTi(PS)including the steps of: (a) providing a mixture of lithium sulfide LiS, phosphorus sulfide PSand titanium sulfide TiS; (b) subjecting the mixture prepared in step (a) to a preliminary reaction step through mechanical milling or melt-quenching to produce an intermediate amorphous sulfide mixture; (c) subjecting the mixture prepared in step (b) to a heat treatment step at a maximum plateau temperature of at least 350&#xb0; C. and less than 500&#xb0; C.

Method of synthesis of LiTi(PS)

A compound represented by the general formula Li(TiZr)(PS), wherein 0.01&#x2264;x&#x2264;0.25, and found to have high ionic conductivity; a use of the compound as a solid electrolyte, in particular in an all solid-state lithium battery.

Increasing ionic conductivity of LiTi(PS)by Zr doping

A method of treatment of a sample of lithium titanium thiophosphate LiTi(PS)including: (a) providing a solid sample of lithium titanium thiophosphate LiTi(PS), (b) compressing the lithium titanium thiophosphate sample provided in step (a) to form a compressed powder layer; and (c) sintering the lithium titanium thiophosphate obtained as a compressed powder layer in step (b) at a temperature of at least 200&#xb0; C. and at most 400&#xb0; C.

Increasing ionic conductivity of lithium titanium thiophosphate by sintering

A solid state battery () including a stack of cells (), each cell comprising a positive electrode (), a negative electrode () and a solid electrolyte () disposed between the positive electrode () and the negative electrode (), wherein a current collector () is disposed between the negative electrode () of a first cell (A) and the positive electrode () of a second cell (B), the second cell (B) being adjacent to the first cell (A), the solid state battery () comprising an ionic conductor () having two configurations, a normal configuration wherein the ionic conductor () is not in contact with the current collector () and a short-circuit configuration wherein the ionic conductor () is in contact with the current collector (), the negative electrode () of the first cell (A) and the positive electrode () of the second cell (B) and wherein the ionic conductor () has an ionic conductivity which smaller than an electronic conductivity of the current collector ().

Solid state batteries

A method for controlling a charge process of a solid-state battery having a sulfur-based positive electrode is provided. The method includes monitoring and storing a temperature of the solid-state battery and a predetermined interval, when the temperature exceeds a threshold temperature, monitoring the temperature of the solid-state battery and/or processing the stored temperature data of the solid-state battery, for an indication of sulfur sublimation, and terminating a flow of charge current upon detection of the indication of sulfur sublimation.

System and method for charge protection of a lithium-ion battery

A control device for controlling charging of a rechargeable battery, the control device being configured to: determine the voltage of the battery during charging of the battery, stop charging, when the determined voltage exceeds a predetermined upper voltage limit, determine the voltage of the battery after stopping charging, determine the voltage difference between the predetermined upper voltage limit and the determined voltage of the battery after stopping charging, and continue charging, when the determined voltage difference exceeds a predetermined threshold. A corresponding method controls charging of a rechargeable battery.

The present disclosure relates to a material containing the elements Li, M, P, S and X wherein M=Si, Ge or Sn, and X=F, Cl, Br or I. The material can be used as a sulfide solid electrolyte material, notably for an all-solid-state lithium battery.

Materials for solid electrolyte

A compound represented by the general formula LiAlTi(PS), wherein 0.1&#x2264;x&#x2264;0.75. The above compound has been found to have high ionic conductivity. Also, the use of the compound as a solid electrolyte, in particular in an all solid-state lithium battery.

Growing community of inventors

Brussels, Belgium

Yuki Katoh