Honda Motor Co., Ltd.

Sumitomo Electric Industries, Limited

Shintaro Aoyagi

Yuji Isogai

Kiyoshi Tanaami

Takashi Mukai

Naoto Yamashita

Taichi Sakamoto

Makiko Takahashi

Kaoru Omichi

Tomohiro Kinoshita

Akihiro Yoshizawa

Toshimitsu Tanaka

Akihisa Hosoe

Kazuki Okuno

Akihisa Tanaka

Kikuo Senoo

Hiroshi Takebayashi

To provide a nonaqueous electrolyte secondary battery which enables to suppress durability deterioration, improve energy density, and further suppress a decrease in the function of the nonaqueous electrolyte secondary battery cell. A nonaqueous electrolyte secondary battery, comprising: a positive electrode; and a negative electrode, wherein the negative electrode has: a current collector comprising a porous metal body; and a negative electrode material disposed in pores of the porous metal body, the negative electrode material comprises a negative electrode active material comprising a silicon-based material, a skeleton-forming agent comprising a silicate having a siloxane bond, a conductive auxiliary, and a binder, and a content of the skeleton-forming agent in an outside in a surface direction of the negative electrode is higher than a content of the skeleton-forming agent in an inside in the surface direction of the negative electrode.

Nonaqueous electrolyte secondary battery

In a lithium ion secondary battery (), a positive electrode () and a negative electrode () are alternately adjacent to each other via separators () and (). The positive electrode () includes a positive electrode current collector composed of a metal porous body, a first positive electrode active material () held on one side of the positive electrode current collector, and a second positive electrode active material () held on the other side. The negative electrode () includes a negative electrode current collector composed of a metal porous body, a first negative electrode active material () held on one side of the negative electrode current collector, and a second negative electrode active material () held on the other side. The first positive electrode active material () faces the first negative electrode active material (), and the positive electrode active material () faces the second negative electrode active material ().

Lithium ion secondary battery

Provided are a negative electrode that is for use in a non-aqueous electrolyte secondary battery, includes a porous metal body as a current collector, contains a skeleton-forming agent highly infiltrated in the current collector so that it is less likely to suffer from structural degradation and provides improved cycle durability; and a non-aqueous electrolyte secondary battery including such a negative electrode. The negative electrode for use in a non-aqueous electrolyte secondary battery includes a current collector including a porous metal body; a first negative electrode material disposed in pores of the porous metal body and including a conductive aid, a binder, and a negative electrode active material including a silicon-based material; and a second negative electrode material disposed in pores of the porous metal body and including a skeleton-forming agent including a silicate having a siloxane bond.

Negative electrode for use in non-aqueous electrolyte secondary battery and non-aqueous electrolyte secondary battery including same

An object is to provide a non-aqueous electrolyte secondary battery negative electrode that can suppress a deterioration in durability and improve energy density, and a non-aqueous electrolyte secondary battery including the same. A non-aqueous electrolyte secondary battery negative electrode, comprising: a collector formed of a porous metal body, and a negative electrode material disposed in pores of the porous metal body, wherein the negative electrode material comprises a negative electrode active material formed of a silicon-based material, a skeleton-forming agent comprising a silicate having a siloxane bond, a conductivity aid, and a binder.

Non-aqueous electrolyte secondary battery negative electrode and non-aqueous electrolyte secondary battery including same

A cathode active material is provided which has a charge and discharge capacity larger than that of FeFwhen used in a non-aqueous electrolyte secondary battery. The cathode active material for use in secondary batteries with a non-aqueous electrolyte includes an amorphous metal fluoride represented by a general formula FeNaMF, wherein M is a metal element selected from a group consisting of Co, Ni, Cu, Mg, Al, Zn, and Sn, n represents an oxidation number of the metal element M, 0&#x3c;x&#x2266;0.4, and 0&#x2266;y&#x2266;0.1.

Cathode active material

Provided is a positive electrode material for a non-aqueous electrolyte secondary battery, having an energy density and a power density higher than those of a positive electrode material for a non-aqueous electrolyte secondary battery employing only iron fluoride as the positive electrode active material. The positive electrode material for a non-aqueous electrolyte secondary battery is characteristic in including a first positive electrode active material represented by a general formula: FeNaCoF(0&#x3c;x&#x2266;0.4, 0&#x3c;y&#x2266;0.1) and a second positive electrode active material composed of LiFePOhaving a surface coated with carbon.

Positive electrode material for non-aqueous electrolyte secondary battery

Provided is a positive electrode active material capable of obtaining high capacity density and also capable of obtaining sufficient charge-discharge characteristics in a region which involves high current density, when the positive electrode active material is used in a non-aqueous electrolyte secondary battery. The positive electrode active material for the non-aqueous electrolyte secondary battery includes FeF3 in which at least a part of a surface thereof is coated with an electroconductive metal oxide.

Positive electrode active material for non-aqueous electrolyte secondary battery

Provided is a cathode material capable of obtaining high energy density and superior instantaneous output characteristics in a lithium ion secondary battery. The cathode material is used in a lithium ion secondary battery (), and includes FeFand LiVOas a cathode active material. A mass ratio of FeFto LiVOof the cathode material is in a range of 86:14 to 43:57. The cathode material further comprises a conductive auxiliary.

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Saitama, Japan

Shintaro Aoyagi