Mitsubishi Chemical Corporation

Sanyo Electric Co., Ltd.

Mu Ionic Solutions Corporation

Youichi Ohashi

Takashi Fujii

Shinichi Kinoshita

Minoru Kotato

Noriko Shima

Masamichi Onuki

Hiroyuki Tokuda

Masahiro Takehara

Maruo Kamino

Taizou Sunano

Kunihisa Shima

Kouhei Tuduki

Kazuki Watanabe

Martin Winter

Shuhei Sawa

Ryoichi Kato

Tooru Fuse

Hidekazu Yamamoto

Michael Sternad

Koji Fukamizu

Akemi Hosokawa

Takashi Fuji

A non-aqueous liquid electrolyte secondary battery using negative-electrode active material having Si, Sn and/or Pb, with high charge-capacity, superior characteristics including discharge-capacity retention rate over long is provided. Its non-aqueous liquid electrolyte contains carbonate having unsaturated bond and/or halogen and compounds like LiPFand/or LiBF(first lithium salt) and lithium salt different from said first one, represented by formula below (second lithium salt).Li(αX)

Non-aqueous liquid electrolyte and non-aqueous liquid electrolyte secondary battery

A non-aqueous liquid electrolyte secondary battery using negative-electrode active material having Si, Sn and/or Pb, with high charge-capacity, superior characteristics including discharge-capacity retention rate over long is provided. Its non-aqueous liquid electrolyte contains carbonate having unsaturated bond and/or halogen and compounds like LiPFand/or LiBF(first lithium salt) and lithium salt different from said first one, represented by formula below (second lithium salt).Li(&#x3b1;X)(In the formula, l, m and n represent integers of 1 to 10, 1 to 100 and 1 to 200, respectively. &#x3b1; represents boron, carbon, nitrogen, oxygen or phosphorus. Xrepresents functional group having atom selected from 14th to 17th groups of periodic table at its binding-position to &#x3b1;. Two or more of Xmay be connected to each other to form a ring structure. However, such a case where a is boron and Xis compound represented by(CHO)(CHO)is omitted (i and j represent integers of 2 or larger.).

Provided is a non-aqueous electrolyte solution that enables the fabrication of a non-aqueous secondary battery with which gas generation during battery use in high-temperature environments or with continuous charging is suppressed. Also provided is a non-aqueous electrolyte secondary battery that uses this non-aqueous electrolyte solution. The non-aqueous electrolyte solution is used in a non-aqueous electrolyte secondary battery that has a positive electrode having a positive electrode active material capable of absorbing and releasing a metal ion, and a negative electrode having a negative electrode active material capable of absorbing and releasing a metal ion, the non-aqueous electrolyte solution containing a compound represented by formula (1) and a nitrile compound in prescribed contents. 

Non-aqueous electrolyte solution and non-aqueous electrolyte secondary battery using same

A non-aqueous liquid electrolyte secondary battery using negative-electrode active material having Si, Sn and/or Pb, with high charge-capacity, superior characteristics including discharge-capacity retention rate over long is provided. The non-aqueous liquid electrolyte of the battery contains carbonate having unsaturated bond and/or halogen and and an anhydride compound.

A nonaqueous electrolytic solution that can provide a high energy density nonaqueous electrolyte secondary battery having a high capacity, excellent storage characteristics, and excellent cycle characteristics and suppressing the decomposition of an electrolytic solution and the deterioration thereof when used in a high-temperature environment includes an electrolyte, a nonaqueous solvent, and a compound represented by general formula (1): wherein R, R, and Reach independently represent a hydrogen atom, a cyano group, or an optionally halogen atom-substituted hydrogen group having 1 to 10 carbon atoms, with the proviso that Rand Rdo not simultaneously represent hydrogen atoms.

Nonaqueous electrolytic solution and nonaqueous electrolyte secondary battery

A non-aqueous liquid electrolyte secondary battery using negative-electrode active material having Si, Sn and/or Pb, with high charge-capacity, superior characteristics including discharge-capacity retention rate over long is provided. The non-aqueous liquid electrolyte of the battery contains carbonate having unsaturated bond and/or halogen and compounds such as LiPFand/or LiBF(first lithium salt) and lithium salt different from the first lithium salt.

An object is to provide a nonaqueous electrolyte and a nonaqueous-electrolyte secondary battery which have excellent discharge load characteristics and are excellent in high-temperature storability, cycle characteristics, high capacity, continuous-charge characteristics, storability, gas evolution inhibition during continuous charge, high-current-density charge/discharge characteristics, discharge load characteristics, etc. The object has been accomplished with a nonaqueous electrolyte which comprises: a monofluorophosphate and/or a difluorophosphate; and further a compound having a specific chemical structure or specific properties.

Nonaqueous electrolyte for secondary battery and nonaqueous-electrolyte secondary battery employing the same

Provided are a nonaqueous electrolyte solution having improved durability properties in terms of cycling, storage and the like and improved discharge characteristic at a high current density, and a nonaqueous electrolyte battery that uses that nonaqueous electrolyte solution. The nonaqueous electrolyte solution containing a lithium salt and a nonaqueous solvent that dissolves the lithium salt, wherein the nonaqueous electrolyte solution contains a compound represented by formula (1) and at least one compound selected from the group consisting of a compound having a cyano group, a cyclic ester compound having a sulfur atom and a compound having an isocyanate group. 

The present invention relates to a nonaqueous electrolyte solution comprising a lithium salt and a nonaqueous organic solvent, wherein the nonaqueous electrolyte solution comprises a specific sulfonic acid ester.

Nonaqueous electrolyte solution and nonaqueous electrolyte battery using same

A non-aqueous liquid electrolyte suitable for use in a non-aqueous liquid electrolyte secondary battery comprising a negative electrode and a positive electrode, capable of intercalating and deintercalating lithium ions, and the non-aqueous liquid electrolyte, the negative electrode containing a negative-electrode active material having at least one kind of atom selected from the group consisting of Si atom, Sn atom and Pb atom, wherein the non-aqueous liquid electrolyte comprises a carbonate having at least either an unsaturated bond or a halogen atom.

A nonaqueous electrolyte containing a monofluorophosphate and/or a difluorophosphate and a compound having a specific chemical structure or specific properties. The nonaqueous electrolyte can contain at least one of a saturated chain hydrocarbon, a saturated cyclic hydrocarbon, an aromatic compound having a halogen atom and an ether having a fluorine atom.

Nonaqueous electrolytes and nonaqueous-electrolyte secondary batteries employing the same

Provided is a nonaqueous electrolyte secondary battery which, even in the case of using a low-viscosity solvent having a narrow potential window, can increase the electrochemical stability of the nonaqueous electrolyte solution and suppress side reactions of the nonaqueous electrolyte solution during charge and discharge to reduce the degradation of the battery characteristics and has an excellent storage characteristic in high-temperature environments and a nonaqueous electrolyte solution for the nonaqueous electrolyte secondary battery. The nonaqueous electrolyte secondary battery includes: a positive electrode containing a positive-electrode active material; a negative electrode containing a negative-electrode active material; and a nonaqueous electrolyte solution containing a solute dissolved in a nonaqueous solvent, wherein the nonaqueous electrolyte solution further contains benzotrifluoride and a diisocyanate compound and the content of benzotrifluoride is 5% by volume or more in the nonaqueous electrolyte solution except the solute.

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Ibaraki, Japan

Youichi Ohashi