Massachusetts Institute of Technology

Toyota Motor Europe

Geoffroy Hautier

Gerbrand Ceder

ByoungWoo Kang

Jae Chul Kim

Anubhav Jain

Yuki Katoh

Jinhyuk Lee

Xin Li

Sangtae Kim

Anna Miglio

Alexander Urban

Robert Daniel

Charles J Moore

Hailong Chen

Robert E Doe

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 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

This disclosure provides a positive electrode active lithium-excess metal oxide with composition LiMO(0.6&#x2264;y&#x2264;0.85 and 0&#x2264;x+y&#x2264;2) for a lithium secondary battery with a high reversible capacity that is insensitive with respect to cation-disorder. The material exhibits a high capacity without the requirement of overcharge during the first cycles.

High-capacity positive electrode active material

This disclosure provides a positive electrode active lithium-excess metal oxide with composition LiMO(0.6&#x2266;y&#x2266;0.85 and 0&#x2266;x+y&#x2266;2) for a lithium secondary battery with a high reversible capacity that is insensitive with respect to cation-disorder. The material exhibits a high capacity without the requirement of overcharge during the first cycles.

The present invention generally relates to certain lithium materials, including lithium manganese borate materials. Such materials are of interest in various applications such as energy storage. Certain aspects of the invention are directed to lithium manganese borate materials, for example, having the formula LiMn(BO). In some cases, the lithium manganese borate materials may include other elements, such as iron, magnesium, copper, zinc, calcium, etc. The lithium manganese borate materials, according to one set of embodiments, may be present as a monoclinic crystal system. Such materials may surprisingly exhibit relatively high energy storage capacities, for example, at least about 96 mA h/g. Other aspects of the invention relate to devices comprising such materials, methods of making such materials, kits for making such materials, methods of promoting the making or use of such materials, and the like.

Electrochemical device comprising lithium manganese borate compounds

This invention relates generally to electrode materials, electrochemical cells employing such materials, and methods of synthesizing such materials. The electrode materials have a crystal structure with a high ratio of Li to metal M, which is found to improve capacity by enabling the transfer of a greater amount of lithium per metal, and which is also found to improve stability by retaining a sufficient amount of lithium after charging. Furthermore, synthesis techniques are presented which result in improved charge and discharge capacities and reduced particle sizes of the electrode materials.

Mixed phosphate-diphosphate electrode materials and methods of manufacturing same

The present invention generally relates to carbophosphates and other compounds. Such compounds may be used in batteries and other electrochemical devices, or in other applications such as those described herein. One aspect of the invention is generally directed to carbophosphate compounds, i.e., compounds containing carbonate and phosphate ions. For example, according to one set of embodiments, the compound has a formula A(M)(PO)(CO), where M comprises one or more cations. A may include one or more alkali metals, for example, lithium and/or sodium. In some cases, x is greater than about 0.1, a is between about 0.1 and about 5.1, and b is between about 0.1 and about 5.1. In certain embodiments, the compound may have a unit cell atomic arrangement that is isostructural to unit cells of the minerals sidorenkite, bonshtedtite, bradleyite, crawfordite, or ferrotychite. In some embodiments, the compound may have a formula A(M)(YO)(XO), where A comprises one or more alkali metals, M comprises one or more cations, X includes B, C, and/or N, and Y includes Si, P, As, S, V, Nb, Mo, and/or W. In some cases, x is greater than about 0.1, a is between about 0.1 and about 5.1, and b is between about 0.1 and about 5.1. Other aspects of the invention are generally directed to techniques for making or using such compounds, kits involving such compounds, and the like.

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Somerville, MA, United States of America

Geoffroy Hautier