Samsung Electronics Co., Ltd.

Massachusetts Institute of Technology

University of California

Tomoyuki Tsujimura

Yuichi Aihara

Naoki Suzuki

Yan E Wang

Gerbrand Ceder

Lincoln James Miara

Seitaro Ito

William D Richards

Jusik Kim

SeWon Kim

Hyeokjo Gwon

Satoshi Fujiki

Sungkyun Jung

Nobuya Machida

Young-Gyoon Ryu

Wonsung Choi

Toshinori Sugimoto

Gabin Yoon

Tomoyuki Shiratsuchi

Jaechul Kim

Shyue Ping Ong

Yifei Mo

Ichiro Uechi

An all-solid secondary battery includes: a cathode layer including a cathode active material; an anode layer; and a solid electrolyte layer disposed between the cathode layer and the anode layer, wherein at least one of the cathode layer, the anode layer, or the solid electrolyte layer includes a phase-transition solid electrolyte material, wherein upon heating, the phase-transition solid electrolyte material undergoes a phase transition from a first phase to a second phase, and the second phase has an ionic conductivity less than the ionic conductivity of the first phase.

Phase-transition solid electrolyte material and all solid secondary battery including the same

A solid ion conductor compound including Li, Ho, and a halogen element, wherein the compound has diffraction peaks at 30°2θ to 33°2θ, 33°2θ to 36°2θ, 40°2θ to 44°2θ, and 48°2θ to 52°28θ, when analyzed using CuKα radiation, and wherein a full width at half maximum of at least one peak at 40°2θ to 44°2θ is 0.3°2θ or greater.

Solid ion conductor compound, solid electrolyte including the same, electrochemical cell including the same, and preparation method thereof

A solid electrolyte for an all-solid secondary battery, the solid electrolyte including: Li, S, P, an M1 element, and an M2 element, wherein the M1 element is at least one element selected from Na, K, Rb, Sc, Fr, and the M2 element is at least one element selected from F, Cl, Br, I, molar amounts of lithium and the M1 element satisfy 0<M1/(Li+M1)≤0.07, and the solid electrolyte has peaks at positions of 15.42°±0.50° 2θ, 17.87° degrees±0.50° degrees 2θ, 25.48° degrees±0.50° degrees 2θ, 30.01° degrees±0.50° 2θ, and 31.38°±0.50° 2θ when analyzed by X-ray diffraction using CuKα radiation.

Solid electrolyte and lithium battery including the same

A method of preparing a solid electrolyte and an all-solid battery including a solid electrolyte prepared by the method, the method including: contacting a first solvent and a first starting material comprising an alkali metal, sulfur, phosphorus, an element M, or a combination thereof to form a first solution; precipitating a first precursor from the first solution; contacting a second solvent, the first precursor, and a second starting material comprising an alkali metal, sulfur, phosphorus, an element M, or a combination thereof to form a second solution; precipitating a second precursor from the second solution; and heat treating the second precursor to prepare the solid electrolyte, wherein the element M comprises an element of Group 14 of the Periodic Table of the Elements, and the element M and the alkali metal in the first starting material and the second starting material are the same or different.

Method of preparing solid electrolyte and all-solid battery including solid electrolyte prepared by the method

An all-solid secondary battery, including: a cathode; an anode; and a solid electrolyte layer disposed between the cathode and the anode, wherein the anode comprises an anode current collector; a first anode active material layer in contact with the anode current collector and comprising a first metal; a second anode active material layer disposed between the first anode active material layer and the solid electrolyte layer and comprising a carbon-containing active material; and a contact layer between the second anode active material layer and the solid electrolyte layer, and disposed such that the contact layer prevents contact between the second anode active material layer and the solid electrolyte layer, wherein the contact layer comprises a second metal, and has a thickness less than a thickness of the first anode active material layer.

All-solid secondary battery and method of preparing the same

A composite cathode active material includes a cathode active material particle; and a coating layer on a surface of the cathode active material particle, wherein the coating layer includes an acetate, wherein the acetate comprises an alkali metal acetate, an alkaline earth metal acetate, a transition metal acetate, or a combination thereof, or a derivative thereof.

Composite cathode active material, preparation method thereof, cathode layer including the same, and all-solid secondary battery including the cathode layer

A solid electrolyte for an all-solid secondary battery, the solid electrolyte including: Li, S, P, an M1 element, and an M2 element, wherein the M1 element is at least one element selected from Na, K, Rb, Sc, Fr, and the M2 element is at least one element selected from F, Cl, Br, I, molar amounts of lithium and the M1 element satisfy 0&#x3c;M1/(Li+M1)&#x2264;0.07, and the solid electrolyte has peaks at positions of 15.42&#xb0;&#xb1;0.50&#xb0; 2&#x3b8;, 17.87&#xb0; degrees&#xb1;0.50&#xb0; degrees 2&#x3b8;, 25.48&#xb0; degrees&#xb1;0.50&#xb0; degrees 2&#x3b8;, 30.01&#xb0; degrees&#xb1;0.50&#xb0; 2&#x3b8;, and 31.38&#xb0;&#xb1;0.50&#xb0; 2&#x3b8; when analyzed by X-ray diffraction using CuK&#x3b1; radiation.

A composite cathode active material including: a core particle; a first coating layer; and a second coating layer; wherein the core particle includes a cathode active material, the first and second coating layers cover a surface of the core particle, the first coating layer includes a first lithium-containing compound, wherein the first lithium-containing compound includes zirconium, niobium, titanium, aluminum, or a combination thereof, the second coating layer includes a second lithium-containing compound, wherein the second lithium-containing compound includes germanium, niobium, gallium, or a combination thereof, and the first lithium-containing compound is different from the second lithium-containing compound.

Composite cathode active material and secondary battery including the same

A method of preparing a sulfide solid electrolyte, the method including: first contacting a starting materials including LiS, PS, and LiI in a first solvent to provide a precursor; and second contacting the precursor with a second solvent to prepare the sulfide solid electrolyte, wherein the first solvent includes a C-Calkyl group or a cyclic ether compound which is unsubstituted or substituted with a C-Calkoxy group, and the second solvent includes a C-Chydrocarbon substituted with a Cto Calkoxy group.

Method of preparing sulfide-based solid electrolyte, sulfide-based solid electrolyte prepared therefrom, and solid secondary battery including the sulfide electrolyte

A positive electrode active material includes a core and a coating disposed on at least a portion of a surface of the core. The core includes a lithium metal oxide, a lithium metal phosphate, or a combination thereof. The coating includes a compound according to the formula LiMX, wherein M, X, m, n and p are as defined herein. Also, an electrochemical cell including the positive electrode active material, and methods for the manufacture of the positive electrode active material and the electrochemical cell.

Positive electrode active material, methods for the manufacture thereof, and electrochemical cell comprising the positive electrode active material

A solid electrolyte for an all-solid secondary battery, wherein the solid electrolyte has a composition represented by Formula (1):LiPSBr&#x2003;&#x2003;(1)wherein 1.2&#x3c;x&#x3c;1.75, the solid electrolyte has an argyrodite crystal structure, and the solid electrolyte has at least one peak at a position of a 29.65&#xb1;0.50&#xb0; 2&#x3b8; when analyzed by X-ray diffraction using CuK&#x3b1; radiation.

Solid electrolyte for all-solid lithium secondary battery, all-solid lithium secondary battery, and method of preparing the solid electrolyte

A solid electrolyte material represented by Formula 1:L(M1)(M2)(M3)&#x2003;&#x2003;Formula 1wherein 0.25&#x3c;x&#x3c;1, L is at least one element selected from a Group 1 element, M1 is at least one element selected from a Group 2 element, a Group 3 element, a Group 12 element, and a Group 13 element, M2 is at least one element selected from a Group 5 element, a Group 14 element, and a Group 15 element, and M3 is at least one element selected from a Group 16 element, and wherein the solid electrolyte material has an I-4 crystal structure.

A sodium-conductive solid-state electrolyte material includes a compound of the composition NaMPS, wherein M is selected from Ge, Si, and Sn. The material may have a conductivity of at least 1.0&#xd7;10S/cm at a temperature of about 300K and may have a tetragonal microstructure, e.g., a skewed P1 crystallographic structure. Also provided are an electrochemical cell that includes the sodium-conductive solid-state electrolyte material and a method for producing the sodium-conductive solid electrolyte material via controlled thermal processing parameters.

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Yokohama, Japan

Tomoyuki Tsujimura