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:
Provided are a negative electrode for a secondary battery realizing satisfactory cycle characteristics and a method for manufacturing the same, and a nonaqueous electrolyte secondary battery having satisfactory cycle characteristics. A negative electrode for a secondary battery formed by bonding a negative electrode active material to a negative electrode collector with a negative electrode binder, in which the negative electrode binder is a polyimide or a polyamide-imide, and the negative electrode collector is a Cu alloy containing at least one metal (a) selected from the group consisting of Sn, In, Mg and Ag and has a conductivity of 50 IACS % or more. The negative electrode for a secondary battery can be manufactured by a method including forming a negative electrode layer containing the negative electrode active material and the precursor of the negative electrode binder on the negative electrode collector; and bonding the negative electrode active material to the negative electrode collector with the negative electrode binder by curing the precursor of the negative electrode binder at 250 to 350° C.
摘要:
In a lithium ion secondary battery including a positive electrode, a separator, a negative electrode, and a package body, the negative electrode includes simple substance silicon as a negative electrode active material, and a negative electrode binder, and is doped with lithium, and the following formulas (1) and (2) are satisfied: 1.2≦Ma/Mc≦1.9 (1) 1.0
摘要翻译:在包含正极,隔膜,负极和封装体的锂离子二次电池中,负极包括作为负极活性物质的单质硅和负极粘合剂,并掺杂有锂,并且 满足以下公式(1)和(2):1.2 @ Ma / Mc @ 1.9(1)1.0
摘要:
There is provided a polymer secondary battery using silicon and silicon oxide as a negative electrode active material that shows a high capacity retention rate also when a charge and discharge cycle is repeated. A polymer secondary battery including a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a polymer-containing gel electrolyte, wherein the negative electrode includes silicon and silicon oxide as a negative electrode active material, and the polymer-containing gel electrolyte is present in voids formed by fine division of particles of the negative electrode active material.
摘要:
An exemplary embodiment provides a lithium ion secondary battery using a high energy type anode, which enables long-life operation thereof. A secondary battery according to an exemplary embodiment comprises an electrode element in which a cathode and an anode are oppositely disposed, an electrolytic solution, and an outer packaging body which encloses the electrode element and the electrolytic solution inside; wherein the anode is formed by binding an anode active material, which comprises carbon material (a) that can absorb and desorb a lithium ion, metal (b) that can be alloyed with lithium, and metal oxide (c) that can absorb and desorb a lithium ion, to an anode collector with an anode binder; and wherein the electrolytic solution comprises a liquid medium which is hard to generate carbon dioxide at a concentration of 10 to 80 vol %.
摘要:
An object of the present invention is to provide a negative electrode for a secondary battery which has large capacity and restrains a rise in resistance inside the battery and reduction in capacity even after cycles and the secondary battery using the same. A first active material layer 2a comprising members occluding and releasing Li onto a collector 1a is formed and a second active material layer 3a as an alloy layer containing metal forming alloy with lithium or lithium and metal not-forming alloy with lithium is formed thereon. The secondary battery is constituted using the negative electrode.
摘要:
This invention relates to an anode for a secondary battery capable of occluding and releasing lithium ions, the anode having a multi-layer structure comprising: a first layer containing carbon as a main component; and a second layer as a main component containing a lithium-occluding material film, the film capable of occluding lithium more than a theoretical lithium-occlusion capacity for carbon, as well as a secondary battery using the anode. This invention can provide a secondary battery with a substantially improved battery capacity in a range where the battery is actually used, while having a higher charge-discharge efficiency and good cycle properties.
摘要:
A lithium ion secondary battery provided with both high weight energy density and good cycle characteristics (capacity retaining ratio during an extended use). A secondary battery comprising a negative electrode having, as a negative electrode active material, carbon and a lithium absorbing material that forms an alloy with lithium, the above active material having a layer structure, a positive electrode capable of absorbing and desorbing lithium ions, and an electrolyte disposed between the positive and negative electrodes, wherein the Li content in the lithium absorbing material layer in the negative electrode is between 31 and 67% at a discharge depth of 100%.
摘要:
A lithium secondary battery in the present invention includes as a negative electrode a lithium alloy, lithium metal formed on a conductive substrate by vacuum film-forming, or the lithium metal having a hydrophobic material layer formed on a surface of an amorphous metallic lithium. Such a lithium secondary battery gives satisfaction with no dendrite formation and long cycle life.
摘要:
A negative electrode for a rechargeable battery including: a current collector, a first layer containing a conductive material to occlude and release lithium ion, the first layer formed on the current collector, a second layer containing a metal selected from lithium and lithium alloy, the second layer formed on the first layer, and a third layer containing a lithium ion conductive material, the third layer formed on the second layer. The third layer prevents the lithium and/or the lithium alloy in the second layer from being in contact with the electrolyte and smoothly feeds the lithium to the second layer to improve the efficiency of the negative electrode. The first layer can occlude and release the part of the lithium to be occluded and released, thereby reducing the volume change of the second layer. Such a structure of the negative electrode enables us to enhance cycling efficiency, and to attain long cycle life and good safety.