摘要:
Provided is a negative electrode active material for a lithium secondary cell, the material having the function of a binder for the active material, and being capable of stable reversible reactions with lithium. Also, provided are an extended-life lithium secondary cell having improved energy density and stable charge/discharge, and a method for producing the same. The negative electrode active material for a lithium secondary cell is polyimide represented by formula (1) (wherein R1 and R2 independently denote an alkyl, alkoxy, acyl, phenyl, or phenoxy group).
摘要:
Provided is a lithium secondary cell in which elution of manganese from a manganese olivine compound into an electrolyte is suppressed, a high level of safety is obtained, the charge/discharge cycle efficiency and suppression of leakage of manganese during storage can be maintained over a long period, a long lifespan is obtained, a rapid decrease in cell voltage near the end of discharge is suppressed, and output characteristics are enhanced, when a manganese olivine compound having excellent stability during charge/discharge is used as the principal component in the positive electrode active material. The positive electrode contains a positive electrode active material containing an olivine compound represented by LiMm1-aXaPO4 (where X represents Mg and/or Fe, and a represents a value that satisfies 0≦a≦0.3) and a lithium nickel oxide represented by LiNi1-bZbO2 (where Z represents one or more selected from Co, Mn, Al, Mg, and V; and b represents a value that satisfies 0≦b≦0.4), the content of the olivine compound being from 50 to 95 mass %.
摘要翻译:本发明提供一种能够抑制锰从锰橄榄石化合物溶解成电解质的锂二次电池,能够获得高水平的安全性,能够在长时间内保持充放电循环效率和锰的泄漏抑制 时间长,寿命长,抑制放电结束附近的电池电压的急剧下降,并且当充放电时的稳定性优异的锰橄榄石化合物作为正极中的主要成分时,能够提高输出特性 活性物质 正极含有含有由LiMm1-aXaPO4(其中X表示Mg和/或Fe,a表示满足0≤a≤0.3的值)的LiMm1-aXaPO4表示的橄榄石化合物的正极活性物质和由LiNi1-aXaPO4表示的锂镍氧化物, bZbO2(其中Z表示选自Co,Mn,Al,Mg和V中的一种或多种; b表示满足0 @ b @ 0.4的值),橄榄石化合物的含量为50〜95质量%。
摘要:
Provided is a negative electrode active material for a lithium secondary cell, the material having the function of a binder for the active material, and being capable of stable reversible reactions with lithium. Also, provided are an extended-life lithium secondary cell having improved energy density and stable charge/discharge, and a method for producing the same. The negative electrode active material for a lithium secondary cell is polyimide represented by formula (1) (wherein R1 and R2 independently denote an alkyl, alkoxy, acyl, phenyl, or phenoxy group).
摘要:
A secondary battery according to the present exemplary embodiment is a secondary battery including a laminated electrode body provided with at least one pair of positive and negative electrodes and an outer enclosure that accommodates the laminated electrode body, wherein the outer enclosure includes one or more concave portions, inside a border corresponding to an outer edge of an electrode surface of an outermost layer of the laminated electrode body, on a surface facing the electrode surface, and wherein, when a band-shaped outer circumferential region having an area that is a half of an area inside the border is set inside the border, at least one of the concave portions is located inside the outer circumferential region.
摘要:
The present invention relates to a compound represented by the general formula (1) or its salt, a process for producing the same, and an antifungal agent comprising the same as an effective component: ##STR1## wherein R.sup.1 represents a substituted or unsubstituted aryl group or a substituted or unsubstituted heterocyclic group bonded through a carbon atom in the ring to the main chain; R.sup.2 presents a hydrogen atom, a fluorine atom or a substituted or unsubstituted alkyl group; and R.sup.3 represents a cyano group, a thioamido group or a group represented by the formula ##STR2## in which R.sup.4 is a hydroxyl group or a group of the formula ##STR3## (R.sup.7 and R.sup.8, which may be the same or different, are hydrogen atoms or substituted or unsubstituted alkyl, alkenyl, alkynyl, cycloalkyl, aryl, amino, alkoxy, hydroxyl or heterocyclic groups, and may form a substituted or unsubstituted heterocyclic group together with the nitrogen atom to which R.sup.7 and R.sup.8 attach), R.sup.5 is a substituted or unsubstituted alkoxy group or a group of the formula ##STR4## (R.sup.7 and R.sup.8 are as defined above), and R.sup.6 is a hydrogen atom or a substituted or unsubstituted alkyl group.
摘要:
The disclosed device easily and precisely satisfies a requested output range, and is provided with: a ΔΣ-modulator (12) which converts a digital input signal to a pulse signal; an input comparison device (11) which compares an input value that corresponds to the digital input signal, and a pre-set threshold value; and a thinned output control unit (14) which, when the result of the comparison by the input comparison device (11) shows that the input value is less than the threshold value, reduces the output value corresponding to the input value in accordance with the size of the difference between the input value and the threshold value, and sets the output value to 0 when the input value is 0.
摘要:
In a nonaqueous electrolyte secondary battery using silicon and silicon oxide as a negative electrode active material, the charge and discharge cycle characteristics are improved. A nonaqueous electrolyte secondary battery in the exemplary embodiment comprises a sheet-shaped negative electrode comprising a negative electrode active material layer comprising a composite of silicon and silicon oxide formed on a negative electrode current collector, and a sheet-shaped positive electrode comprising a positive electrode active material layer formed on a positive electrode current collector, wherein the negative electrode is disposed opposed to the positive electrode via a separator, a peripheral edge portion of the negative electrode active material layer is disposed within a peripheral edge portion of the positive electrode active material layer, and a relationship of 1.00
摘要翻译:在使用硅和氧化硅作为负极活性物质的非水电解质二次电池中,充放电循环特性得到改善。 本实施方式的非水电解质二次电池包括由在负极集电体上形成的由硅和氧化硅构成的复合体的负极活性物质层和包含正极集电体的片状正极的片状负极, 形成在正极集电体上的活性物质层,其中,所述负极经由隔膜与所述正极配置成相对,所述负极活性物质层的周缘部配置在所述正极活性物质的周缘部 当正极的充电容量为a,负极的充电容量为b,b / a = c时,满足1.00
摘要:
The object of an exemplary embodiment of the invention is to provide a negative electrode having excellent cycle property. An exemplary embodiment of the invention a method for doping and dedoping lithium for the first time after a negative electrode for a lithium secondary battery comprising silicon oxide as an active material is produced, comprising doping the lithium within the following current value range (A) and within the following doped amount range (B); current value range (A): a range of a current value in which a doped amount in which only one peak appears at 1 V or less on the V-dQ/dV curve becomes maximum, wherein the V-dQ/dV curve represents a relationship between voltage V of the negative electrode with respect to a lithium reference electrode and dQ/dV that is a ratio of variation dQ of lithium dedoped amount Q in the negative electrode to variation dV of the voltage V, and doped amount range (B): a range of a doped amount in which only one peak appears at 1 V or less on the V-dQ/dV curve.
摘要:
There is provided a control system for a lithium secondary battery that can quantitatively sense a deterioration state inherent in a lithium secondary battery using silicon oxide as a negative electrode active material, that is, the nonuniform reaction state of a negative electrode. A control system for a lithium secondary battery including a positive electrode, a negative electrode using silicon oxide as a negative electrode active material, and a lithium reference electrode having a reference potential with respect to the negative electrode includes measurement means for measuring a voltage V of the negative electrode with respect to the lithium reference electrode and a discharge capacity Q of the lithium secondary battery during discharge of the lithium secondary battery; generation means for generating a V-dQ/dV curve representing a relationship between dQ/dV, which is a proportion of an amount of change dQ in the discharge capacity Q to an amount of change dV in the voltage V, and the voltage V; calculation means for calculating an intensity ratio of two peaks appearing on the V-dQ/dV curve for two voltage values in the voltage V; and sensing means for sensing a state of the negative electrode utilizing the intensity ratio.
摘要:
A secondary battery according to the present exemplary embodiment is a secondary battery including a laminated electrode body provided with at least one pair of positive and negative electrodes and an outer enclosure that accommodates the laminated electrode body, wherein the outer enclosure includes one or more concave portions, inside a border corresponding to an outer edge of an electrode surface of an outermost layer of the laminated electrode body, on a surface facing the electrode surface, and wherein, when a band-shaped outer circumferential region having an area that is a half of an area inside the border is set inside the border, at least one of the concave portions is located inside the outer circumferential region.