Sekisui Chemical Co., Ltd.

Shotaro Kobaru

Akira Nakasuga

Tsutomu Nakamura

Akihiro Ogawa

Shoji Nozato

Akihiko Fujiwara

Nobuhiko Inui

Ryosuke Takahashi

Hiroshi Yoshitani

Ryoma Ishii

Takahiko Sawada

Kazuhiko Imamura

Takamasa Kouno

Yuki Sakurai

Tatsunori Takamatsu

Yasushi Uematsu

Masatoshi Minami

Mitsuo Sasakura

Hiroshi Tada

Kazuo Yamagata

Provided is a micro-fluid chip that enables reducing contamination between branch channels, has a relatively simple channel structure and facilitates miniaturization. A micro-fluid chip () having a channel structure () through which a fluid is delivered, wherein the channel structure () includes: a main channel () having an inflow port () and an outflow port (); a plurality of branch channels () to () connected to the main channel (), each branch channel having an inflow end on a side connected to the main channel () and an outflow end that is an end portion on an opposite side to the inflow end; and a sub-branch channel () connected to the main channel () between at least one pair of adjacent branch channels () and () among the plurality of branch channels () to (), the sub-branch channel () having an inflow end on a side connected to the main channel ().

Micro-fluid chip

The present invention provides a propylene-based resin microporous film which has excellent electrolyte solution retention property, and can provide a lithium ion battery in which a decrease in discharge capacity is highly reduced even after repeated charge and discharge. The propylene-based resin microporous film is a propylene-based resin microporous film having micropores, wherein a propylene-based resin having a weight average molecular weight of 250,000 to 500,000, a melting point of 160 to 170&#xb0; C., and a pentad fraction of 96% or more is contained, the surface aperture ratio is 27 to 42%, the ratio of a surface aperture ratio to a porosity is 0.6 or less, and the degree of gas permeability is 50 to 400 s/100 mL.

Propylene-based resin microporous film, separator for battery, battery, and method for producing propylene-based resin microporous film

There is provided a method for producing a negative electrode material for lithium ion secondary batteries that is easily produced and is less likely to cause deterioration in charge and discharge cycle characteristics. A method for producing a negative electrode material for lithium ion secondary batteries, comprises steps of heating a raw material composition comprising resin-retained partially exfoliated graphite having a structure in which graphene is partially exfoliated and Si particles to dope the partially exfoliated graphite with the Si particles, the partially exfoliated graphite being obtained by pyrolyzing a resin in a composition in which the resin is fixed to graphite or primary exfoliated graphite, thereby exfoliating the graphite or primary exfoliated graphite while allowing part of the above resin to remain; providing a composition comprising the above partially exfoliated graphite doped with the Si particles, a binder resin, and a solvent; and shaping the above composition.

Fine particle-exfoliated graphite composite, negative electrode material for lithium ion secondary battery, and methods for producing the same, and lithium ion secondary battery

Provided is a method for producing a propylene-based resin microporous film capable of forming a high-performance lithium ion battery. The method for producing a propylene-based resin microporous film includes an extrusion step of melt-kneading a propylene-based resin in an extruder, and extruding the resin to obtain a propylene-based resin film; a first stretching step of uniaxially stretching the propylene-based resin film at a surface temperature of &#x2212;20 to 100&#xb0; C.; second stretching step of repeating, a plurality of times, a stretching basic step in which the propylene-based resin film after the first stretching step is uniaxially stretched at a surface temperature that is equal to or lower than a temperature lower than the melting point of the propylene-based resin by 10 to 100&#xb0; C., wherein between successive stretching basic steps, the stretching ratio in the forward-side stretching basic step is adjusted so as to be lower than that of the backward-side stretching basic step; and an annealing step of annealing the propylene-based resin film after the second stretching step.

Method for producing propylene-based resin microporous film and propylene-based resin microporous film

Growing community of inventors

Osaka, Japan

Shotaro Kobaru