Mitsubishi Chemical Corporation

Other

Tooru Fuse

Nobuyuki Ishiwatari

Hideaki Tanaka

Minoru Kotato

Daigo Nagayama

Koichi Nishio

Masakazu Yokomizo

Akio Ueda

Shunsuke Yamada

Takashi Kameda

Shingo Morokuma

Hiromitsu Ikeda

Shinji Kasamatsu

Yoshiaki Nitta

Hiroyuki Tokuda

Youichi Ohashi

Shuhei Sawa

Iwao Soga

Satoshi Akasaka

Masao Miyake

Keita Yamaguchi

Yosuke Saito

Hiroyuki Uono

Tomiyuki Kamada

Youji Arita

Yukihiro Miyamoto

Hisako Kondo

Tomohiro Satou

Etsuko Miyake, Legal Representative

Akihiro Katou

Keiko Nishioka

Hideharu Satou

Masashi Fujiwara

Akihiro Kato

A carbon material may include granulated particles satisfying (1L) and (2L):

Carbon material, method for producing carbon material, and non-aqueous secondary battery using carbon material

A carbon material for a non-aqueous secondary battery containing a graphite capable of occluding and releasing lithium ions, and having a cumulative pore volume at pore diameters in a range of 0.01 μm to 1 μm of 0.08 mL/g or more, a roundness, as determined by flow-type particle image analysis, of 0.88 or greater, and a pore diameter to particle diameter ratio (PD/d50 (%)) of 1.8 or less, the ratio being given by equation (1A): PD/d50 (%)=mode pore diameter (PD) in a pore diameter range of 0.01 μm to 1 μm in a pore distribution determined by mercury intrusion/volume-based average particle diameter (d50)×100 is provided.

An object of the present invention is to provide a carbon material for negative electrodes of non-aqueous secondary batteries having a high capacity, a high output, excellent cycle characteristics and a low irreversible capacity. The present invention relates to a carbon material for negative electrodes of non-aqueous secondary batteries, the carbon material comprising: (1) a composite carbon particles (A) containing elemental silicon, and (2) amorphous composite graphite particles (B) in which graphite particles (C) and amorphous carbon are composited.

Carbon material for negative electrode of non-aqueous secondary battery, negative electrode for non-aqueous secondary battery, and non-aqueous secondary battery

An objet of the invention is to provide a non-aqueous electrolyte secondary battery superior in input-output characteristics even at a low temperature. To achieve the object, hybrid particles (carbon material) satisfying certain conditions, and composed of graphite particles and carbon particles with a primary particle size from 3 nm to 500 nm, preferably as well as amorphous carbon, are used as a negative electrode active material for a non-aqueous electrolyte secondary battery, so that the input-output characteristics of a non-aqueous electrolyte secondary battery at a low temperature can be improved remarkably.

Carbon material for non-aqueous electrolyte secondary battery, negative electrode for non-aqueous electrolyte secondary battery, non-aqueous electrolyte secondary battery, and manufacturing method for carbon material for non-aqueous electrolyte secondary battery

The present invention resolves the problem by using a multilayer-structured carbon material, as a nonaqueous electrolytic solution secondary battery negative electrode, which satisfies the following (a) and (b):

Multilayer-structured carbon material for nonaqueous electrolytic solution secondary battery negative electrode, negative electrode for nonaqueous secondary battery, lithium ion secondary battery, and process for producing multilayer-structured carbon material for nonaqueous electrolytic solution secondary battery negative electrode

This invention aims to provide a carbon material for a nonaqueous secondary battery having a high capacity and excellent charging/discharging load characteristics, which is used as a negative electrode material for a nonaqueous secondary battery. This invention relates to a carbon material for a nonaqueous secondary battery, which has a specific (1) Raman R value, (2) N atom concentration/C atom concentration ratio, and (3) S atom concentration/C atom concentration ratio.

Carbon material for nonaqueous secondary battery, negative electrode using carbon material and nonaqueous secondary battery

A negative-electrode material is provided that can be produced at a low cost and yields a lithium secondary battery with an excellent balance of various battery characteristics even when used in high electrode densities. It has a graphite powder with a tap density of 0.80 g/cmor higher and 1.35 g/cmor lower, an amount of surface functional groups, O/C value, of 0 or larger and 0.01 or smaller, a BET specific surface area of 2.5 m/g or larger and 70 m/g or smaller, a Raman R value of 0.02 or larger and 0.05 or smaller.

Negative electrode material for lithium secondary battery, method for producing same, negative electrode for lithium secondary battery using same and lithium secondary battery

A negative electrode material for a nonaqueous electrolyte rechargeable battery that can stably and efficiently realize a high-performance nonaqueous electrolyte rechargeable battery in which a high discharge capacity, high charge/discharge efficiency at an initial stage and during charge/discharge cycles, and excellent charge/discharge cycle properties are provided as well as electrode expansion in volume after charge/discharge cycles is suppressed. The negative electrode material for a nonaqueous electrolyte rechargeable battery in the form of particles having, at least on the surface thereof, a compound of the phase in which an element Z is present in Si in a non-equilibrium state. The compound is expressed by the general formula SiZM, where Z represents C and/or N, M represents an element other than C and N, and when the concentration of the element Z in a compound SiZ, where each of a and p is an integer, having a composition closest to that of Si and present in an equilibrium state is presumed to be 100 atomic percent, the concentration of the element Z in the compound SiZMis in the range of 10 to 95 atomic percent, and y is in the range of 0 to 0.5.

Nonaqueous electrolyte rechargeable battery, and negative electrode and material thereof

The present invention relates to a negative electrode material for a non-aqueous lithium secondary battery comprising a metal material M consisting of solid phases A and B, a graphite material, and a carbonaceous material having a crystallinity lower than that of said graphite material, wherein said metal material M has a structure in which a part or all of the surface of a core particle consisting of said solid phase A is covered with said solid phase B; said solid phase A contains at least silicon as a constitutive element; and said solid phase B is a solid solution or an intermetallic compound of silicon and a specific element.

Negative electrode material for non-aqueous lithium secondary battery, method for manufacturing the same, and non-aqueous lithium secondary battery using the same

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Ibaraki, Japan

Tooru Fuse