Bayerische Motoren Werke Aktiengesellschaft

Sung-Jin Kim

Thomas Woehrle

Yang-Kook Sun

Sebastian Scharner

Matthias Wagner

Hideki Ogihara

Thomas Hoefler

Peter Lamp

Nikolaos Tsiouvaras

Ann-Christin Gentschev

Madhavi Srinivasan

Tobias Zeilinger

Jens Vetter

Kamelia Detig-Karlou

Jan-Oliver Roth

Wensheng Yang

Peng Wu

Miriam Karin Keppeler

Georg Steinhoff

Matthias Tschech

Claudia Lintz

Ning Zhang

Fang Lian

A method for producing a composite electrode for a lithium or lithium-ion battery comprises: providing a current collector having a main surface; forming a first electrode layer on the main surface of the current collector, wherein a first adhesion is formed between the current collector and the first electrode layer along the main surface; forming a second electrode layer on the first electrode layer, wherein the first and second electrode layer contact each other along a contact surface opposite the main surface of the current collector, the second electrode layer is adhesively connected to the first electrode layer along the contact surface; and compressing the first and second electrode layer by means of a compression device, wherein, during the compressing, a pressure element of the compression device exerts a pressure on at least one part of the surface of the second electrode layer opposite the contact surface, and a second adhesion can form between the pressure element and the part of the second electrode layer on which the pressure is exerted, wherein the ratio between the first adhesion and the second adhesion resulting from the compression is greater than one.

Composite electrode for a lithium or lithium-ion battery and production method therefor

Electrode material, for a lithium-ion-based electrochemical cell, containing primary particles of a Mn-containing spinel-type metal oxide selected from the group consisting of spinel-type lithium-nickel-manganese-oxide, spinel-type lithium-manganese-oxide, and mixtures thereof. Mn of the Mn-containing spinel-type metal oxide is partially substituted with a substitution-element selected from the group consisting of Si, Hf, Zr, Fe, Al, V and mixtures thereof and the primary particles are aggregated in order to form secondary particles, with the secondary particles having the shape of a microsphere.

Electrode material, use of an electrode material for a lithium-ion-based electrochemical cell, lithium-ion-based electrochemical cell

A high energy density lithium-ion rechargeable battery cell is provided which includes an anode material containing a carbon-nanotube (CNT)-Si composite and a cathode material containing a core-shell gradient and/or concentration gradient nickel-based lithium metal oxide.

High energy lithium ion secondary battery with improved lifetime and energy density

A composite electrode is provided having a collector, the collector is coated with an electrode composition containing an active electrode material, a binding agent, and a conductivity additive such as conductive carbon black. The electrode composition has a concentration gradient along the direction of the electrode thickness in respect of the active electrode material and the conductivity additive, with the concentration gradient of the active electrode material increasing toward the collector, and the concentration gradient of the conductivity additive and the binder decreasing toward the collector. Two different methods of producing the composite electrode are also provided. A lithium-ion battery is further provided which includes a composite electrode having a collector, the collector is coated with an electrode composition containing an active electrode material, a binding agent, and a conductivity additive.

Composite electrode and lithium-ion battery comprising same and method for producing the composite electrode

Growing community of inventors

Munich, Germany

Sung-Jin Kim