Hitachi Maxell, Limited

Hitachi Maxwell, Ltd.

Santoku Metal Industry Co., Ltd.

Akira Asada

Takatomo Nishino

Shinji Yamasaki

Tadashi Sakata

Megumu Takai

Keiji Nakamura

Yoshifumi Sakamoto

Masanori Sugano

Nonaqueous secondary battery with lithium titanium cathode

A non-aqueous liquid electrolyte cell comprising a positive electrode which has a metal oxide as an active material, a negative electrode, and a non-aqueous liquid electrolyte, in which the metal oxide has an average particle size of 40 to 150 &mgr;m, and the volume of the liquid electrolyte is 0.9 to 1.25 times as large as the volume of the metal oxide, which has good characteristics even at low temperature.

Non-aqueous liquid electrolyte cell

A method for recovering reusable rare earth compounds such as rare earth oxides, rare earth fluorides, or rare earth metals from rare earth alloy scrap in an effective and safe manner. The method includes the steps of: (a) pulverizing rare earth alloy scrap at least by hydrogenating the alloy scrap to obtain pulverized alloy scrap, (b) heating the pulverized alloy scrap to obtain an oxide, (c) contacting the oxide with an acid solution to leach rare earth element into the acid solution in the form of ions, and filtering a resulting solution containing rare earth ions to obtain a filtrate, and (d) forming a precipitate containing rare earth element from the filtrate.

Method for recovering reusable rare earth compounds

Growing community of inventors

Hyogo-ken, Japan

Akira Asada