Kanto Denka Kogyo Co., Ltd.

Kyushu University

Kumiko Sueto

Osamu Omae

Shigeto Okada

Jun-ichi Yamaki

Yuan Gao

Tomoko Iwanaga

Tomoyuki Shiratsuchi

Shinji Iizuka

Takeshi Shimada

Kazuki Muraishi

Miyuki Kasahara

Tomoyuki c/o Kyushu University Shiratsuchi

An ionic liquid which contains an organic matter represented by the following general formula (1) as a cation component. The ionic liquid is stably in a liquid state over a wide temperature range and is excellent in electrochemical stability. The ionic liquid is advantageously used for applications such as electric power storage devices, lithium secondary batteries, electrical double layer capacitors, dye-sensitized solar cells, fuel cells, and reaction solvents. 

Ionic liquid containing phosphonium cation having P&#x2014;N bond and method for producing same

The present invention provides a positive electrode active material that has rate characteristics suitable for nonaqueous electrolyte batteries and particularly nonaqueous electrolyte secondary batteries, a method by which this positive electrode active material can be easily mass produced, and a high-performance nonaqueous electrolyte battery that has a positive electrode active material obtained by this method. The present invention relates to a method of producing a positive electrode active material, the method comprising a step of mixing a carbon source with lithium manganese phosphate LiMnPOor a compound LiMnMPO(where, 0&#x2266;x&#x3c;1 and M is at least one metal element selected from the group consisting of Co, Ni, Fe, Zn, Cu, Ti, Sn, Zr, V, and Al) containing lithium manganese phosphate LiMnPOas a solid solution composition, and heat treating the obtained mixture under an inert gas atmosphere.

Method of producing positive electrode active material and nonaqueous electrolyte battery using the same

The present invention provides an olivine-type positive electrode active material that is an inexpensive and very safe positive electrode active material that also exhibits excellent battery properties even at high energy densities. The present invention also provides a method of producing this olivine-type positive electrode active material and a nonaqueous electrolyte battery that has a positive electrode that contains this olivine-type positive electrode active material. The present invention relates to a positive electrode active material that comprises an olivine-type lithium manganese phosphate compound represented by the following general formula (1)LiMnMPO&#x2003;&#x2003;(1)(in the formula, 0&#x3c;x&#x3c;2, 0&#x3c;y&#x3c;1, 0&#x3c;a&#x3c;1, and M is at least one metal element selected from the group consisting of Co, Ni, Fe, Zn, Cu, Ti, Sn, Zr, V, and Al) and that has a particle diameter of 10 to 500 nm.

Positive electrode active material and method of producing the same and nonaqueous electrolyte battery having positive electrode containing positive electrode active material

Ionic liquids exhibit a stable liquid state even at low temperatures and have a good conductivity. The ionic liquids each contain an organic compound represented by the following formula (1) as a cation. In the formula, Rto Rmay be the same as or different from each other and each represents an H, a halogen, or a Cto Calkyl group, cycloalkyl group, heterocyclic group, aryl group or alkoxyalkyl group; X and Y may be the same as or different from each other and each represents an N or a P; Z represents an S or an O.

Ionic liquids and process for manufacturing the same

Growing community of inventors

Shibukawa, Japan

Kumiko Sueto