Nec Corporation

Samsung Sdi Co., Inc.

Nec Energy Devices, Ltd.

Koji Utsugi

Mitsuhiro Mori

Mariko Miyachi

Hitoshi Ishikawa

Akira Hirano

Shigeyuki Iwasa

Naoyasu Ikeda

Kaichiro Nakano

Hironori Yamamoto

Daisuke Kawasaki

Kentaro Nakahara

Tamaki Miura

Jiro Iriyama

Yuki Kusachi

Ikiko Yamazaki

Yutaka Bannai

Takeshi Saitoh

Shinako Kaneko

Hiroyuki Endoh

Eiichi Kitazume

Tatsuji Numata

Kazuaki Matsumoto

Hiroshi Tada

Tsuyoshi Katou

Masashi Tamegai

Masato Shirakata

Junko Nishiyama

Yasutaka Kono

Akinobu Nakamura

Hidemasa Kawai

Yoko Hashizume

Eriko Tsuruoka

Masayasu Ishiko

Hiroshi Kobayashi

The present invention relates to a non-aqueous electrolyte comprising a non-aqueous electrolyte solvent, a supporting salt, and a sulfonate represented by a predetermined formula, the non-aqueous electrolyte having a sulfonate concentration of 0.001 wt % or more and less than 0.2 wt % based on the total mass of the non-aqueous electrolyte.

Non-aqueous electrolyte secondary battery

There is provided a lithium secondary battery which has excellent characteristics such as energy density and electromotive force and is excellent in cycle life and storage stability. An electrolyte solution for secondary battery comprising at least an aprotic solvent having an electrolyte dissolved therein and a compound represented by the general formula (1).

Electrolyte solution for a secondary battery

A non-aqueous electrolyte can suppress decomposition of a solvent, improve the cycle life of a secondary battery, suppress the rise of resistance of a secondary battery and improve the capacity maintenance ratio of a secondary battery. A non-aqueous electrolyte secondary battery formed by using such a non-aqueous electrolyte includes a non-aqueous electrolyte containing an aprotic solvent and a disulfonic acid ester as expressed by chemical formula 1 shown below, a positive electrode and a negative electrode: 

Non-aqueous electrolyte and non-aqueous electrolyte secondary battery using the same

Additive for an electrolyte solution for an electrochemical device

Secondary battery using an electrolyte solution

A lithium secondary battery which has excellent characteristics such as energy density and electromotive force and is excellent in cycle life and storage stability is provided. The secondary battery comprises a positive electrode, a negative electrode, and an electrolyte solution comprising an aprotic solvent having at least an electrolyte dissolved therein, wherein the positive electrode comprises a lithium-manganese composite oxide having a spinel structure as a positive electrode active material, and the electrolyte solution comprises a compound represented by the general formula (1).

Secondary battery

The present invention provides a non-aqueous electrolyte secondary battery having excellent properties such as energy density and electromotive force and being excellent in cycle life, storage property and safety. In the present invention, the non-aqueous electrolyte secondary battery comprises a substance having a peak from 162.9 to 164.0 eV by XPS analysis on the anode surface.

This invention provides a lithium ion secondary battery comprising a cathode, an anode and an nonaqueous electrolytic solution in which an electrolyte is dissolved in a nonaqueous solvent, wherein the anode comprises a non-graphitizable carbon as an anode activator; and the nonaqueous electrolytic solution comprises at least one anode protecting component selected from the group consisting of sultones having a 5- to 7-membered cyclic sulfonate structure and their substituted derivatives as well as vinylene carbonates and their substituted derivatives.

Lithium ion secondary battery

A vacuum deposition apparatus is used for deposit evaporated substance from evaporation sources (and) on the desired position of a flexible substrate (). While the flexible substrate () is carried using rollers in a vacuum, shutters (and) are opened and closed to control the movement of the evaporated substance via openings. A film having a desired shape of pattern is formed on the flexible substrate () with higher controllability.

Device and method for vacuum film formation

An electrolyte for a secondary battery containing an aprotic solvent which contains at least imide anion, transition metal ion and a compound containing a sulfonyl group in an aprotic solvent. The electrolyte has the performance such as the excellent energy density and electromotive force, and the secondary battery using the electrolyte is excellent in the cycle life and the safety.

Electrolyte for secondary battery and secondary battery using same

An object of the present invention is to provide a negative electrode for a secondary battery which has large capacity and restrains a rise in resistance inside the battery and reduction in capacity even after cycles and the secondary battery using the same. A first active material layercomprising members occluding and releasing Li onto a collectoris formed and a second active material layeras an alloy layer containing metal forming alloy with lithium or lithium and metal not-forming alloy with lithium is formed thereon. The secondary battery is constituted using the negative electrode.

Secondary battery-use negative electrode and secondary battery using it

An anode for a secondary battery capable of inserting and extracting a lithium ion having a multi-layered structure including a first anode layer containing carbon as a main component; a second anode layer made of a film-like material through which a lithium component passes; and a third anode layer containing lithium and/or a lithium-containing compound as a main component. The battery capacity of the lithium ion battery is substantially increased while the higher charge-discharge efficiency and the stable cycle performance are maintained.

Anode for secondary battery, secondary battery using same and method for fabricating anode

The present invention provides a technology of inhibiting the decomposition of the solvent of the electrolyte solution for the secondary battery. Further, the present invention provides a technology of prohibiting the resistance increase of the secondary battery and improving the storage properties such as improving the capacity retention ratio. The electrolyte solutioncomprising non-proton solvent and cyclic sulfonic ester including at least two sulfonyl groups may be used.

Electrolyte solution for secondary battery and secondary battery using the same

An anode with a multi-layer structure including a first layer () having carbon as a main component, and a second layer () having lithium-ion conductivity and including a material as a main component thereof which can insert and extract lithium ions, or a multi-layer structure including a third layer () containing lithium in addition to the first layer and the second layer, and a lithium secondary battery including the same. The lithium secondary battery can be provided in which the battery capacity is substantially enhanced in the voltage range where the battery is actually used while maintaining the higher charge-discharge efficiency and the excellent cycle performance.

Nonaqueous electrolyte cell

A lithium secondary cell has, on a conductive substrate (collector) a lithium layer containing metallic lithium or an alloy thereof, and further has a metal fluoride substance film containing at least one type metal fluoride substance.

Growing community of inventors

Tokyo, Japan

Koji Utsugi