摘要:
The negative electrode of the present invention is characterized by its composite particles constructed in such a manner that at least part of the surrounding surface of nuclear particles containing at least one of tin, silicon and zinc as a constituent element, is coated with a solid solution or an inter-metallic compound , which is composed of, the element included in the nuclear particles, and at least one other element except the elements included in the nuclear particles selected from a group comprising group 2 elements, transition elements, group 12 elements, group 13 elements and group 14 elements except carbon of the Periodic Table. The present invention is characterized that the lithium content of the nuclear particles of the composite particles is 40-95 atomic percent of the theoretical limit of lithium content of each constituent element of the nuclear particles. Further, the batteries are first charged at a constant current and upon reaching the predetermined voltage, are charged at a constant voltage. The current density during charging are set at not more than 5mA/cm 2 as a in the area where the positive and negative electrodes face each other. With the foregoing construction, high energy-density non-aqueous electrolyte secondary batteries with superior cycle life properties and a charging method for the same can be obtained.
摘要翻译:本发明的负极的特征在于,其复合颗粒的构成是将含有锡,硅和锌中的至少一种作为构成元素的至少一部分核粒子的周围表面涂布固溶体 或由包含在核粒子中的元素构成的金属间化合物,以及除了选自包含第2族元素,过渡元素,第12族元素的核粒子中的元素以外的至少一种其它元素, 第13族元素和第14族元素,除了元素周期的碳。 本发明的特征在于,复合粒子的核粒子的锂含量为核粒子的各构成元素的锂含量的理论极限的40〜95原子%。 此外,电池首先以恒定电流充电并且在达到预定电压时以恒定电压被充电。 在正极和负极彼此面对的区域中,充电期间的电流密度设定为5mA / cm 2以下。 通过上述结构,可以获得具有优异循环寿命特性的高能量密度非水电解质二次电池及其充电方法。
摘要:
A nonaqueous electrolyte secondary battery with excellent charging/discharging cycle characteristics is provided, more specifically a nonaqueous electrolyte secondary battery in which deterioration of the conductivity of a negative electrode due to charging/discharging cycle is suppressed and a method for manufacturing the same are provided. The nonaqueous electrolyte secondary battery includes: a positive electrode and a negative electrode that are capable of reversibly absorbing and desorbing Li ions; and a nonaqueous electrolyte having lithium ion conductivity. The negative electrode includes a collector and active material particles that are disposed on a surface of the collector. The active material particles include Si and at least one element R selected from the group consisting of Sn, In, Ga, Pb and Bi. Metallic bond including the element R is formed between the active material particles.
摘要:
In cycles of charging and discharging, an excellent capacity maintenance rate is obtained. The charging and discharging cycle characteristic of battery is enhanced. Further, an excellent initial discharging capacity is obtained. A negative electrode, a positive electrode, and a non-aqueous electrolyte are contained. The negative electrode includes an alloy of Si, a first element and a second element. The first element includes at least one element selected from the group consisting of the second group element except Mg in the periodic table, transition elements, twelfth group element, thirteenth group element except B, and fourteenth group element except Si. The second element includes at least one element of B and Mg.
摘要:
The present invention relates to non-aqueous electrolyte secondary batteries comprising an positive electrode and a negative electrode capable of intercalating and de-intercalating lithium, a non-aqueous electrolyte and separators or solid electrolytes. The negative electrode contains, as a main component , composite particles constructed in such a manner that at least part of the surface of nuclear particles comprising at least one of tin, silicon and zinc as a constituent element, is coated with a solid solution or an inter-metallic compound composed of the element included in the nuclear particles and another predetermined element which is not an element included in the nuclear particles. To improve the ability of the battery, the composite particles mentioned above can include at least one trace element selected from iron, lead and bismuth. The porosity of a mixture layer at the negative electrode is 10% or more and 50% or less. The amount of the non-aqueous electrolyte, the thickness of the separators or the like is restricted in a specific value. The foregoing construction suppresses occurrence of an internal short circuit between the positive electrode and the negative electrode caused by expansion of the negative electrode materials , thereby achieving a high capacity battery with a superior charge/discharge cycle properties, which is suitable for a high-speed charging.
摘要:
The present invention relates to non-aqueous electrolyte secondary batteries. The negative electrode contains, as main a component, composite particles constructed in such a manner that at least part of the surface of nuclear particles comprising at least one of tin, silicon and zinc as a constituent element, is coated with a solid solution or an inter-metallic compound composed of elements included in the nuclear particle and at least one element , exclusive of the element included in said nuclear particle, selected from a group of elements in a Periodic Table, comprising group 2 elements, transition elements, group 12 elements, group 13 elements and group 14 elements exclusive of carbon. The batteries of the present invention include non-aqueous electrolytic solution and solid electrolytes comprising polymer gel electrolytes. The construction of the present invention provides a non-aqueous electrolytic secondary battery with which a possibility of the generation of gas is extremely low when stored at high temperatures. It also provides a battery having higher capacity, and superior cycle properties, high-rate charge/discharge properties.
摘要:
A negative electrode material for a nonaqueous electrolyte secondary battery having a high discharge capacity and a good cycle life is made from alloy particles having an average particle diameter of 0.1 - 50 µm and including Si phase grains 40 and a phase of a solid solution or an intermetallic compound of Si and other element selected from Group 2A elements, transition elements, Group 3B elements, and Group 4B elements from the long form periodic table (for example, an NiSi 2 phase 42 and an [NiSi 2 + NiSi] phase 41) at least partially enveloping the Si phase grains. 5-99 wt% of this material is Si phase grains. The alloy particles can be manufactured by rapid solidification (such as atomization or roller quenching) of a melt including Si and the other element or by adhering the other element to Si powder by electroless plating or mechanical alloying and then performing heat treatment. Even if rapid solidification is carried out, a negative electrode material having a good discharge capacity and cycle life is obtained without heat treatment.
摘要:
The present invention relates to a negative electrode material for non-aqueous electrolyte secondary batteries, characterized in that the negative electrode material comprises a composite particle including solid phases A and B, the solid phase A being dispersed in the solid phase B, and the ratio (I A /I B ) of the maximum diffracted X-ray intensity (I A ) attributed to the solid phase A to the maximum diffracted X-ray intensity (I B ) attributed to the solid phase B satisfies 0.001 ≦ I A /I B ≦ 0.1, in terms of a diffraction line obtained by a wide-angle X-ray diffraction measurement of the composite particle. This negative electrode material is capable of suppressing of pulverization thereof due to repeated cycles. Further, the use of this negative electrode material allows production of a non-aqueous electrolyte secondary battery having a high capacity and an excellent cycle life characteristic.
摘要翻译:非水电解质二次电池用负极材料技术领域本发明涉及一种非水电解质二次电池用负极材料,其特征在于,所述负极材料包括固相A和B的复合粒子,固相A分散在固相B中, 归因于固相A的归属于固相B的最大衍射X射线强度(IB)的最大衍射X射线强度(IA)的IA(IB / IB)满足0.001 IA = 0.1,通过复合粒子的广角X射线衍射测定得到的衍射线。 该负极材料由于重复循环而能够抑制其粉碎。 此外,通过使用该负极材料,可以制造具有高容量,优异的循环寿命特性的非水电解质二次电池。
摘要:
A non-aqueous electrolyte secondary battery using composite particles for its negative electrode. In the composite particles , nucleus particles including at least one element selected from tin, silicon, and zinc as their constituent element are entirely or partly covered with a solid solution or inter-metallic compound of said constituent element and at least one element selected from groups consisting of Group 2 elements, transition elements, and Group 12, Group 13, and Group 14 elements in the Periodic Table except for the constituent element of the nucleus particles and carbon. Further, the present invention is characterized in that the NMR signals of the lithium intercalated in the composite particles appear within the range of -10 to 40 ppm with respect to lithium chloride and at least one signal appears within the range of -10 to 4 ppm .
摘要:
A non-aqueous electrolyte secondary cell is characterized in that the negative plate is made chiefly of composite particles of which at least part of the core particles containing at least one kind among tin, silicon, and zinc as a constituent element are coated with a solid solution or an intermetallic compound consisting of the constituent element constituting the core particles and at least one element selected from the group consisting of Group 2 elements of the periodic table except the constituent element, transition elements, Group 12 elements, Group 13 elements, and Group 14 elements except carbon and in that the content of lithium in the core particles of the composite particles lies in the range from 50 element% to 90 element% of the theoretical limit of the lithium content. The secondary cell is further characterized in that it is charged with, first, a constant current and then with a low voltage after the voltage reaches a preset voltage, and the current density in charging is controlled. Therefore, the non-aqueous electrolyte secondary cell has a high energy density, and excellent cycle life characteristics.
摘要:
An oxygen permeable film including an aggregate of water-repellent particles and having an average particle size of the particles of 0.01 to 50 µm has a contact angle with water of not less than 120° and super water repellency, and therefore has an excellent water vapor permeation inhibiting capability. As the particles, fluorocarbon resins such as polytetrafluoroethylene, polyvinyl fluoride and polyvinylidene fluoride are suitable. The specific surface area of the oxygen permeable film is preferably not less than 0.1 m 2 /g and not more than 500 m 2 /g.