摘要:
An improved non-aqueous electrolyte cell is disclosed in which specific carbonaceous material is used as an anode. The carbonaceous material has interlayer spacing d.sub.002 of not less than 3.70 A, true density not larger than 1.70 g/cm.sup.3 and no exothermic peak not less than 700.degree. C. upon differential thermal analysis under air stream. The combination with cathode active material containing Li in an amount not less than 250 mAH/g in term of charging/discharging capacity, provides superior cyclic life characterisitcs and large capacity.
摘要翻译:公开了一种改进的非水电解质电池,其中使用特定的碳质材料作为阳极。 碳质材料具有不小于3.70A的层间距d002,真空密度不大于1.70g / cm 3,在空气流下进行差热分析时,不具有不低于700℃的放热峰。 与充电/放电容量不小于250mAH / g的含有Li的阴极活性物质的组合提供优异的循环寿命特性和大容量。
摘要:
Disclosed is a highly safe battery separator, in particular a separator for a lithium ion secondary battery, which reduces internal resistance, achieves good ionic conductivity, prevents passing of electrode active materials, and also prevents electrical short circuit by controlling deposition of lithium metal (dendrite). Also disclosed is a means for stably producing the battery separator with high productivity. Specifically disclosed are: a battery separator which is composed of a porous polyolefin sheet that is formed from a group of polyolefin nanofilaments that have an average filament diameter of less than 1 μm and a filament size distribution of 0.2 or less; and a means for producing the battery separator.
摘要:
A secondary battery which exhibits less deterioration of capacity, can maintain high energy densities in high temperature atmospheres, and has high practicality, and an electrolyte used therefor, are provided. The electrolyte contains an anion expressed by (PFaQbRc)−, so degradation of the electrolyte can be prevented. In the formula, Q expresses at least one of CF3, C2F5, and C3F7, and R expresses SO2CF3 and/or SO2C2F5. a, b and c satisfy 1≦a≦5, 0≦b≦5, and, 0≦c≦5, respectively. Furthermore, an anion expressed by N(CnF2n+1SO2)2− is contained, which can further prevent the degradation of the electrolyte. In the formula, n satisfies 1≦n≦2. Therefore, the capacity recovery rate after storage and heavy load discharge maintenance rate are high even in high temperature atmospheres, and high reliability can be obtained.
摘要翻译:表现出较少的容量劣化的二次电池可以在高温环境中保持高能量密度,并且具有很高的实用性,并且提供了用于其的电解质。 电解质含有由(PF), - - - - (C)表示的阴离子,因此电解质的降解 可以防止。 在该式中,Q表示CF 3 3,C 2 F 5,和C 3 F 5中的至少一个 R 3表示SO 2 CO 3和/或SO 2 CO 2,或/ SO 2 > F <5> SUB>。 a,b和c分别满足1 <= a <= 5,0 <= b <= 5,和0 <= c <= 5。 此外,由N(C n N n N 2n + 1 SO 2)2 - 表示的阴离子 - SUP>,其可以进一步防止电解质的劣化。 在公式中,n满足1 <= n <= 2。 因此,即使在高温环境下,储存后的容量恢复率和重负荷放电维持率也高,可以获得高可靠性。
摘要:
A negative electrode of a nonaqueous secondary battery is formed of a carbonaceous material. The ratio RG=Gs/Gb of the degree of graphitization Gs of the carbonaceous material, determined by a surface-enhanced Raman spectrum, to the degree of graphitization Gb, determined by a Raman spectrum measured using argon laser light, is at least 4.5. Alternatively, the carbonaceous material has a peak in a wavelength range above 1,360 cm−1 in a surface-enhanced Raman spectrum which is measured by-the same surface-enhanced Raman spectrum. The deterioration of the nonaqueous secondary battery is suppressed during use in high-temperature environments and high capacity is maintained for long periods.
摘要:
A non-aqueous electrolyte battery includes a cathode, an anode and a non-aqueous electrolyte. The anode uses as an anode active material graphite whose Gs value obtained by a formula (1) from a surface-enhanced Raman spectrum measured by using an argon laser beam is 20 or smaller. Gs=Hsg/Hsd (1) (Here, Hsg represents the height of a signal having a peak within a range of 1580 cm−1 to 1620 cm−1 and Hsd represents the height of a signal having a peak within a range of 1350 cm−1 to 1400 cm−1.) Thus, the high capacity, the high filling characteristics and the low temperature load characteristics of an anode material are improved.
摘要:
A carbonaceous material and a non-aqueous electrolyte cell using the carbonaceous material as an anode are disclosed. The carbonaceous material has an interlayer spacing, d.sub.002, of not less than 3.70 angstroms and a true density of less than 1.70 g/cm.sup.3, and contains from 0.2 to 5.0 weight % of phosphorus. The carbonaceous material has a large doping capacity for Li, and the non-aqueous electrolyte cell using the material has a large capacity and improved charge-discharge cycle characteristics.
摘要:
Disclosed is a highly safe battery separator, in particular a separator for a lithium ion secondary battery, which reduces internal resistance, achieves good ionic conductivity, prevents passing of electrode active materials, and also prevents electrical short circuit by controlling deposition of lithium metal (dendrite). Also disclosed is a means for stably producing the battery separator with high productivity. Specifically disclosed are: a battery separator which is composed of a porous polyolefin sheet that is formed from a group of polyolefin nanofilaments that have an average filament diameter of less than 1 μm and a filament size distribution of 0.2 or less; and a means for producing the battery separator.
摘要:
A powdered graphite and a nonaqueous electrolyte secondary battery are provided. A nonaqueous electrolyte secondary battery is provided which has a highly efficient charge and discharge performance and superior cycle properties. Spheroidizing treatment is appropriately performed for natural graphite having a high capacity by grinding and/or applying impact to form a negative electrode active material, and a negative electrode active layer formed therefrom is provided on a metal electrode foil. Subsequently, the metal electrode foil is applied with a magnetic field so that the spheroidized natural graphite is oriented, followed by drying and compression molding, thereby forming a negative electrode. By the use of this negative electrode, a nonaqueous electrolyte secondary battery can be formed having superior battery properties such as the cycle properties and peeling strength.
摘要:
A rechargeable battery includes an electrode assembly that includes a positive electrode, a negative electrode, a first bipolar electrode between the negative electrode and the positive electrode, and a second bipolar electrode between an outer surface of the electrode assembly and the positive electrode or between a center of the electrode assembly and the negative electrode, wherein the positive electrode, the negative electrode, and the first and second bipolar electrodes are stacked and wound together, and a lead electrically coupled with the electrode assembly. The electrode assembly may include separators between the positive electrode, the negative electrode, and the first and second bipolar electrodes.
摘要:
A method for making a negative electrode component used in a nonaqueous secondary battery that includes the steps of polishing the surface of the negative electrode component by irradiating the surface with light to produce a negative electrode that includes a carbonaceous material in which the ratio RG=Gs/Gb is at least 4.5, where Gs is the degree of graphitization the carbonaceous material as determined by a surface-enhanced Raman spectrum and Gb is degree of graphitization of the carbonaceous material as determined by a Raman spectrum measured using argon laser light and both Gs and Gb are measured under set parameters.