Tosoh Corporation

Hidehiko Misaki

Kiyoshi Kasai

Kohei Iwanaga

Mutsumi Asano

Toru Tsuyoshi

Masanori Kohgo

Masanori Abe

Shuji Takato

Taichi Arakawa

Provided are: an anode active material for a lithium ion secondary battery with which high initial efficiency and battery capacity can be maintained and excellent cycling characteristics are achieved; and a method for producing such an active material. The anode active material for a lithium ion secondary battery, the active material comprising a Si compound and a carbonaceous material or a carbonaceous material and graphite, is obtained by a method comprising the steps of:

Composite active material for lithium ion secondary batteries and method for producing same

A magneto-optical recording medium and process for production of the same are disclosed, the magneto-recording medium comprising a substrate having thereon a magneto-optical recording film and at least one coating film provided on a light incident side and/or an opposite side thereto, of said magneto-optical recording film for protection of said magneto-optical recording film and/or Kerr effect enhancement, wherein said coating film contains silicon, nitrogen, and hydrogen as constituent elements. The magneto-optical recording medium has excellent reliability, excellent read-out performance properties as well as excellent recording sensitivity while exhibiting high magneto-optical effects and freedom from corrosion.

Magneto-optical recording medium and process for production of the same

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Ayase, Japan

Hidehiko Misaki