Umicore

Umicore Korea, Ltd.

Syensqo Sa

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Jean-Sébastien Bridel

Jens M Paulsen

Stijn Put

Nicolas Marx

Delphine Longrie

Dan V Goia

JiHye Kim

Jan Gilleir

Kris Driesen

Dae-Hyun Kim

Daniël Nelis

Areum Park

Dirk Van Genechten

Jean-François Colin

Hee-Sung Gil

Vincent Caldeira

Boaz Moeremans

Cédric Haon

Tim Van Rompaey

Moon-Hyung Choi

Hyuncheol Lee

Hae-Young Kim

Lawrence Alan Hough

Mi-Soon Oh

Ji-Hye Won

Dongjoon Ihm

Jeong-Rae Kim

John I Njagi

Jong-Ju Lee

Jihye Kim

Agnès Brun

Sul-Hee Min

A liquid electrolyte lithium secondary battery cell comprising: —a positive electrode material comprising a lithium transition metal-based oxide powder having a general formula Li((Ni(NiMn)Co)A)O, wherein A is a dopant, −0.025≤a≤0.025, 0.18≤x≤0.22, 0.42≤z≤0.52, 1.075<z/y<1.625, x+y+z=1 and k≤0.01; and—an electrolyte composition comprising: a) at least one cyclic carbonate, b) at least one fluorinated acyclic carboxylic acid ester, c) at least one electrolyte salt, d) at least one lithium compound selected from lithium phosphate compounds, lithium boron compounds, lithium sulfonate compounds and mixtures thereof, e) at least one cyclic sulfur compound, and f) optionally at least one cyclic carboxylic acid anhydride.

Ni based lithium-ion secondary battery comprising a fluorinated electrolyte

A composite powder for use in the negative electrode of a battery, whereby the composite powder comprises composite particles, whereby the composite particles comprise a matrix material and silicon, whereby the composite particles have a particle size distribution having a d10 and a d90, whereby over at least part of the size range from d10 to d90 the composite particles have a size-dependent silicon content. Preferably a finer fraction of the composite powder has an average particle size D1 and a silicon content S1 and a coarser fraction of the composite powder has an average particle size D2 and a silicon content S2, whereby a size dependence factor F is defined as follows F=(S2&#x2212;S1)/(D2&#x2212;D1), whereby the absolute value of the size dependence factor F is at least 0.04 wt % silicon/&#x3bc;m.

Composite powder for use in the negative electrode of a battery and a battery comprising such a composite powder

A rechargeable electrochemical cell comprising a negative electrode and a positive electrode is described. The positive electrode comprises a product having as overall formula Lip(NiMnCoMAlA)O, wherein M signifies one or more elements from the group Mg, Ti, Cr, V and Fe, wherein A signifies one or more elements from the group F, C, Cl, S, Zr, Ba, Y, Ca, B, Sn, Sb, Na and Zn, and wherein 0.9&#x3c;(x+y+z+m+n+a)&#x3c;1.1, b&#x3c;0.02, 0.9&#x3c;p&#x3c;1.110, 0.30&#x3c;x&#x3c;0.95, (y+z)&#x2265;0.09, 0&#x2264;m&#x2264;0.05, 0&#x2264;a&#x2264;0.05, and 0&#x2264;n&#x2264;0.15. The negative electrode comprises composite particles, wherein the composite particles comprise silicon-based domains in a matrix material. The individual silicon-based domains are either free silicon-based domains that are not or not completely embedded in the matrix or are fully embedded silicon-based domains that are completely surrounded by the matrix material.

Rechargeable electrochemical cell and battery

An active material powder for use in a negative electrode of a battery, wherein the active material powder comprises active material particles, wherein the active material particles comprise silicon-based particles, wherein when said active material powder is crossed by a plane, then at least 65% of the discrete cross-sections of the silicon-based particles included in that plane, satisfy optimized conditions of shape and size, allowing the battery containing such an active material powder to achieve a superior cycle life and a production method of such an active material powder.

Active material powder for use in a negative electrode of a battery and a battery comprising such an active material powder

Composite powder for use as electrochemically active material in an anode of a lithium ion battery, whereby the particles of the composite powder comprise a carbon-based matrix material and silicon particles embedded in this matrix material, whereby the silicon particles and the matrix material have an interface, characterized in that at this interface there are Si&#x2014;C chemical bonds present.

Composite powder for use in an anode of a lithium ion battery, method for manufacturing a composite powder and lithium ion battery

This invention relates to a negative electrode material for lithium-ion batteries comprising silicon and having a chemically treated or coated surface influencing the zeta potential of the surface. The active material consists of particles or particles and wires comprising a core comprising silicon, wherein the particles have a positive zeta potential in an interval between pH 3.5 and 9.5, and preferably between pH 4 and 9.5. The core is either chemically treated with an amino-functional metal oxide, or the core is at least partly covered with OSiHgroups, with 1&#x3c;x&#x3c;3, 1&#x2264;y&#x2264;3, and x&#x3e;y, or is covered by adsorbed inorganic nanoparticles or cationic multivalent metal ions or oxides.

Positively charged silicon for lithium-ion batteries

Growing community of inventors

Chungnam, South Korea

Jean-Sébastien Bridel