Kabushiki Kaisha Toshiba

Tetsuya Tachibe

Mitsuhiro Oki

Masaru Hayashi

Miyuki Takenaka

Fuminobu Tezuka

Yuki Tomioka

Kunihiko Sasaki

This invention relates to a method of quantitative analysis of hexavalent chromium in a chromate coating on a substrate. In this method a substrate on which the chromate coating is formed is immersed into an aqueous solution containing lithium hydroxide to extract hexavalent chromium within an extraction solution. Quantitative analysis of extracted hexavalent chromium in the extraction solution is then performed.

Method of quantitative analysis of hexavalent chromium in chromate coating and method for controlling hazardous element in encapsulating resin of resin encapsulation semiconductor device

Disclosed is a method of reclaiming a cathodic active material of lithium ion secondary batteries. The lithium ion secondary battery is broken and the casing and the content are separated to remove the casing from the content. The content is dissolved into a mineral acid to separate remaining non-dissolved content from the mineral acid to obtain a liquid containing the cathodic active material represented by the formula: LiMO,, where M is a transition metal element: cobalt, nickel and manganese. A lithium salt is added to the liquid, and the cathodic active material is recovered from the liquid in the form of a mixture of lithium compound and the transition metal compound, which is calcined and reclaimed into the cathodic active material.

Method of reclaiming cathodic active material of lithium ion secondary battery

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Yokohama, Japan

Tetsuya Tachibe