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15066results about "Electrode carriers/collectors" patented technology

Conductive lithium storage electrode

A compound comprising a composition Ax(M′1-aM″a)y(XD4)z, Ax(M′1-aM″a)y(DXD4)z, or Ax(M′1-aM″a)y(X2D7)z, and have values such that x, plus y(1-a) times a formal valence or valences of M′, plus ya times a formal valence or valence of M″, is equal to z times a formal valence of the XD4, X2D7, or DXD4 group; or a compound comprising a composition (A1-aM″a)xM′y(XD4)z, (A1-aM″a)xM′y(DXD4)z(A1-aM″a)xM′y(X2D7)z and have values such that (1-a)x plus the quantity ax times the formal valence or valences of M″ plus y times the formal valence or valences of M′ is equal to z times the formal valence of the XD4, X2D7 or DXD4 group. In the compound, A is at least one of an alkali metal and hydrogen, M′ is a first-row transition metal, X is at least one of phosphorus, sulfur, arsenic, molybdenum, and tungsten, M″ any of a Group IIA, IIIA, IVA, VA, VIA, VIIA, VIIIA, IB, IIB, IIIB, IVB, VB, and VIB metal, D is at least one of oxygen, nitrogen, carbon, or a halogen, 0.0001<a≦0.1, and x, y, and z are greater than zero. The compound can have a conductivity at 27° C. of at least about 10−8 S/cm. The compound can be a doped lithium phosphate that can intercalate lithium or hydrogen. The compound can be used in an electrochemical device including electrodes and storage batteries and can have a gravimetric capacity of at least about 80 mAh/g while being charged/discharged at greater than about C rate of the compound.
Owner:MASSACHUSETTS INST OF TECH

Method for production of stacked battery

A method for production of a stacked battery having a plurality of positive electrode current collection tabs and a plurality of negative electrode current collection tabs drawn out from a stacked member formed by laying positive electrodes and negative electrodes alternately one on the other with separators interposed between them and bonded respectively to a positive lead terminal and a negative lead terminal comprises a step of determining in advance a simultaneously bondable number, or the number of positive electrode current collection tabs and the number of negative electrode current collection tabs that can be laid one on the other and collectively bonded, and bonding conditions for bonding them and a step of forming groups of current collection tabs, each group being formed by laying a number of current collection tabs not exceeding the simultaneously bondable number one on the other, displacing the bonding positions of the groups of positive electrode current collection tabs or those of negative electrode current collection tabs relative to each other in the direction of drawing out the positive electrode current collection tabs or the negative electrode current collection tabs, whichever appropriate, or in a direction perpendicular to the direction on the surface of the positive lead terminal or the negative lead terminal, whichever appropriate, and collectively bonding the positive electrode current collection tabs or the negative electrode current collection tabs of each group under the bonding conditions.
Owner:ENVISION AESC ENERGY DEVICES LTD

Electrode structure for lithium secondary battery and secondary battery having such electrode structure

In an electrode structure for a lithium secondary battery including: a main active material layer formed from a metal powder selected from silicon, tin and an alloy thereof that can store and discharge and capable of lithium by electrochemical reaction, and a binder of an organic polymer; and a current collector, wherein the main active material layer is formed at least by a powder of a support material for supporting the electron conduction of the main active material layer in addition to the metal powder and the powder of the support material are particles having a spherical, pseudo-spherical or pillar shape with an average particle size of 0.3 to 1.35 times the thickness of the main active material layer. The support material is one or more materials selected from a group consisting of graphite, oxides of transition metals and metals that do not electrochemically form alloy with lithium. Organic polymer compounded with a conductive polymer is used for the binder. There are provided an electrode structure for a lithium secondary battery having a high capacity and a long lifetime, and a lithium secondary battery using the electrode structure and having a high capacity, a high energy density and a long lifetime.
Owner:CANON KK
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