摘要:
For us in nonaqueous electrolyte secondary cells, the invention provides an electrode which comprises a first carbon material serving as a core material, and a second carbon material coating the first carbon material over the surface thereof and containing boron. When used as an active substance for negative electrode to provide a nonaqueous electrolyte secondary cell, the electrode diminishes the reduction of the cell capacity that would result if the cell is allowed to store, giving improved storage characteristics to the cell.
摘要:
Storage performance in a charged state is improved with a non-aqueous electrolyte secondary battery using gamma-butyrolactone as a solvent. A non-aqueous electrolyte secondary battery includes a positive electrode (2) containing a positive electrode active material including a lithium-containing transition metal oxide; a negative electrode (1) containing a negative electrode active material capable of intercalating and deintercalating lithium; and a non-aqueous electrolyte including a solute and a solvent; wherein the solvent contains 50 volume % or more of gamma-butyrolactone with respect to the total volume of the solvent, and the positive electrode active material contains a phosphate salt M1PO4, where M1 is a metal element capable of having a valency of 3.
摘要翻译:使用γ-丁内酯作为溶剂的非水电解质二次电池改善了带电状态下的储存性能。 非水电解质二次电池包括含有含锂过渡金属氧化物的正极活性物质的正极(2) 含有能够嵌入和脱嵌锂的负极活性物质的负极(1) 和包含溶质和溶剂的非水电解质; 其中所述溶剂相对于所述溶剂的总体积含有50体积%以上的γ-丁内酯,所述正极活性物质含有磷酸盐M 1 PO 4 >,其中M 1是能够具有3价的金属元素。
摘要:
A lithium secondary battery according to the present invention includes a positive electrode in which an aluminum foil containing manganese is used as a current collector, a negative electrode, and a non-aqueous electrolyte solution formed by dissolving lithium salt in a non-aqueous solvent wherein divalent manganese salt is added to said non-aqueous electrolyte solution.
摘要:
Storage performance in a charged state is improved in a non-aqueous electrolyte battery that contains 10 volume % or more of γ-butyrolactone, which is highly safe and reliable, as a solvent. A non-aqueous electrolyte secondary battery has a positive electrode containing a positive electrode active material composed of a lithium-containing transition metal oxide containing lithium and cobalt, a negative electrode, and a non-aqueous electrolyte solution composed of a solute and a solvent. The solvent contains 10 volume % or more of γ-butyrolactone with respect to the total solvent, and the positive electrode active material contains a Group IVA element and a Group IIA element of the periodic table.
摘要:
Storage performance in a charged state is improved with a non-aqueous electrolyte secondary battery using gamma-butyrolactone as a solvent. A non-aqueous electrolyte secondary battery includes a positive electrode (2) containing a positive electrode active material including a lithium-containing transition metal oxide; a negative electrode (1) containing a negative electrode active material capable of intercalating and deintercalating lithium; and a non-aqueous electrolyte including a solute and a solvent; wherein the solvent contains 50 volume % or more of gamma-butyrolactone with respect to the total volume of the solvent, and the positive electrode active material contains a phosphate salt M1PO4, where M1 is a metal element capable of having a valency of 3.
摘要翻译:使用γ-丁内酯作为溶剂的非水电解质二次电池改善了带电状态下的储存性能。 非水电解质二次电池包括含有含锂过渡金属氧化物的正极活性物质的正极(2) 含有能够嵌入和脱嵌锂的负极活性物质的负极(1) 和包含溶质和溶剂的非水电解质; 其中所述溶剂相对于所述溶剂的总体积含有50体积%以上的γ-丁内酯,所述正极活性物质含有磷酸盐M 1 PO 4 >,其中M 1是能够具有3价的金属元素。
摘要:
A lithium secondary battery including a positive electrode, a negative electrode including a carbon material as an active material, and a nonaqueous electrolyte comprising a solute dissolved in a nonaqueous solvent in which γ-butyrolactone is the main solvent, wherein the carbon material has a ratio (ID/IG) of a Raman spectrum intensity (a peak intensity ratio) (R) obtained by Raman spectroscopy of 0.2 or greater, and the nonaqueous electrolyte includes at least 0.1 part by weight of vinylene carbonate and at least 0.1 part by weight of vinyl ethylene carbonate in 100 parts by weight of the nonaqueous electrolyte.
摘要:
A positive electrode active material for a nonaqueous electrolyte secondary battery comprising a lithium-transition metal oxide having a layered structure and containing at least cobalt as a transition metal, wherein at least part of the surface of the lithium-transition metal oxide is coated by a treatment layer comprising low-temperature phase lithium cobalt oxide.
摘要:
The lithium secondary battery of this invention uses a nonaqueous electrolyte including lithium tetrakis(pentafluorophenyl)borate as a part or whole of an electrolytic salt. As a result, the lithium secondary battery exhibits better charge-discharge cycle performance than a lithium secondary battery using a conventional lithium salt as the electrolytic salt.
摘要:
A nonaqueous electrolyte secondary cell having a rolled-up electrode unit housed in a cell can and comprising a positive electrode and a negative electrode each formed by coating a surface of a striplike current collector with an electrode material. According to a first embodiment, the current collector of at least one of the positive electrode and the negative electrode comprises a plurality of current collector pieces 42 arranged along one direction and a PTC element 5 interconnecting each pair of adjacent current collector pieces 42. Alternatively with a second embodiment, at least one of the positive electrode and the negative electrode comprises a PTC element held between opposed faces of an uncoated portion of the current collector thereof and a base end portion of a current collector tab. The PTC element serves to prevent continuous occurrence of a current in excess of a predetermined value and realizes a high energy density.
摘要:
A nonaqueous electrolyte secondary battery 10 according to an embodiment of the present invention includes a positive electrode 11 having a positive electrode active material that can intercalate and deintercalate lithium, a negative electrode 12 having a negative electrode active material that can intercalate and deintercalate lithium, and a nonaqueous electrolyte having lithium ion conductivity. The positive electrode active material is a layered lithium transition metal composite oxide (for example, one represented by Li1+x(NiyCozMn1-y-z)1-xO2 (where 0≦x≦0.15, 0.1≦y≦0.6, and 0≦z≦0.5)) to which an IVa group element (Zr) and a Va group element (Nb) are added. According to these features, it is possible to provide a nonaqueous electrolyte secondary battery with a selected element to be added to the lithium transition metal composite oxide to reduce the I-V resistance (improve the I-V characteristic), and thereby improving the output/input characteristics.
摘要翻译:根据本发明实施方式的非水电解质二次电池10包括具有能够插入和脱嵌锂的正极活性物质的正极11,具有可插入和脱嵌锂的负极活性物质的负极12,以及 具有锂离子传导性的非水电解质。 正极活性物质是层状锂过渡金属复合氧化物(例如,由Li 1+ x Ni(Ni y)y Co z 1≤x≤0.2(其中0≤x≤0.15,0.1≤y≤0.6)和 0 <= z <= 0.5)),添加IVa族元素(Zr)和Va族元素(Nb)。 根据这些特征,可以提供具有添加到锂过渡金属复合氧化物中的选定元素的非水电解质二次电池,以降低I-V电阻(提高I-V特性),从而提高输出/输入特性。