Nissan Motor Company Limited

Kazuya Minami

Yusuke Nakashima

Hideaki Horie

Yuki Kusachi

Yasuhiko Ohsawa

Hiroshi Akama

Hajime Satou

Atsushi Ito

Hiroyuki Tanaka

Takeshi Nakano

Gentaro Kano

Wataru Ogihara

Naofumi Shoji

Kaho Suzuki

Provided is a technique capable of further improving the cycle characteristics in a negative electrode for a non-aqueous electrolyte secondary battery in which a silicon-based negative electrode active material and a carbon-based negative electrode active material are used in combination as a negative electrode active material, and constituent components of the electrode are not bound to each other via a binder. The negative electrode for a non-aqueous electrolyte secondary battery according to the present invention has a configuration in which a negative electrode active material layer containing a negative electrode active material is formed on a surface of a current collector. The negative electrode active material contains composite secondary particles in which silicon-based negative electrode active material particles and carbon-based negative electrode active material particles are bound to each other via a binder. Here, the content of the binder in the composite secondary particles is 1% by mass or more with respect to the total mass of the silicon-based negative electrode active material particles and the carbon-based negative electrode active material particles. Further, in the negative electrode active material layer, the composite secondary particles are characterized to exist in a state of being not bound to each other via a binder.

Negative electrode for non-aqueous electrolyte secondary battery and non-aqueous electrolyte secondary battery using the same

A negative electrode for non-aqueous electrolyte secondary battery provides a means for improving output characteristics at a high rate. The negative electrode has a negative electrode active material layer having a thickness of 150 to 1500 &#x3bc;m formed on a surface of a current collector. In addition, the negative electrode active material layer includes coated negative electrode active material particles in which at least a part of a surface of a negative electrode active material is coated with a coating agent containing a coating resin and a conductive aid. Furthermore, a porosity of the negative electrode active material layer is 39.0% to 60.0% and a density of the negative electrode active material layer is 0.60 to 1.20 g/cm.

Negative electrode for non-aqueous electrolyte secondary battery

To provide a positive electrode for a lithium ion battery having high energy density and being capable of rapid discharging. A positive electrode for a lithium ion battery, the positive electrode including a positive electrode current collector, a positive electrode active material layer formed on the surface of the positive electrode current collector, and a non-aqueous liquid electrolyte including an electrolyte containing lithium ions and a non-aqueous solvent, in which the positive electrode active material layer includes a positive electrode active material and voids, the voids are filled with the non-aqueous liquid electrolyte, and a proportion of the battery capacity based on a total amount of lithium ions in the non-aqueous liquid electrolyte existing in the positive electrode active material layer with respect to the battery capacity based on a total amount of the positive electrode active material is 3.5 to 15%.

Positive electrode for lithium ion battery and lithium ion battery

To provide a negative electrode for a lithium ion battery having high energy density and excellent rapid charging characteristics. A negative electrode for a lithium ion battery, the negative electrode including a negative electrode current collector, a negative electrode active material layer formed on the surface of the negative electrode current collector, and a non-aqueous liquid electrolyte including an electrolyte containing lithium ions and a non-aqueous solvent, in which the negative electrode active material layer includes a negative electrode active material and voids, the voids are filled with the non-aqueous liquid electrolyte, and a proportion of the battery capacity based on a total amount of lithium ions in the non-aqueous liquid electrolyte existing in the negative electrode active material layer with respect to the battery capacity based on a total amount of the negative electrode active material is 3% to 17%.

Negative electrode for lithium ion battery and lithium ion battery

Growing community of inventors

Kanagawa, Japan

Kazuya Minami