Abstract: Disclosed is a composite negative electrode active material including a graphitizable carbon material containing a layered structure formed of stacked carbon layers partially having a three-dimensional regularity, and a low crystalline carbon material. A negative electrode including the composite negative electrode active material is used to produce a non-aqueous electrolyte secondary battery. The non-aqueous electrolyte secondary battery thus produced has a high energy density and demonstrates a high output/input performance for a long period of time in various environments of high to low temperatures.

Abstract: An Object of the invention is to obtain an all solid lithium battery having an excellent output performance. To achieve the object, a sulfide based solid electrolyte is used as an electrolyte; an oxide containing lithium, a metal element that acts as a redox couple, and a metal element that forms an electron-insulating oxide is used as a cathode active material; and the concentration of the metal element that forms the electron-insulating oxide on the surface of the cathode active material (oxide) that is in contact with the sulfide solid electrolyte is made high.

Abstract: A lithium ion secondary battery includes a positive electrode, a negative electrode and a thin film solid electrolyte including lithium ion conductive inorganic substance. The thin film solid electrolyte has thickness of 20 ?m or below and is formed directly on an electrode material or materials for the positive electrode and/or the negative electrode. The thin film solid electrolyte has lithium ion conductivity of 10?5Scm?1 or over and contains lithium ion conductive inorganic substance powder in an amount of 40 weight % or over in a polymer medium. The average particle diameter of the inorganic substance powder is 0.5 ?m or below. According to a method for manufacturing the lithium ion secondary battery, the thin film solid electrolyte is formed by coating the lithium ion conductive inorganic substance directly on the electrode material or materials for the positive electrode and/or the negative electrode.

Abstract: The problem of the present invention is to provide a sulfide solid electrolyte material having excellent ion conductivity. The present invention solves the problem by providing a sulfide solid electrolyte material comprising an M1 element (such as a Li element), an M2 element (such as a Ge element and a P element), and an S element; having a peak in a position of 2?=29.58°±0.50° in an X-ray diffraction measurement using a CuK? line; and having an IB/IA value of less than 0.50 when a diffraction intensity at the peak of 2?=29.58°±0.50° is represented by IA and a diffraction intensity at a peak of 2?=27.33°±0.50° is represented by IB.

Abstract: Disclosed are: an all solid state secondary battery wherein a solid electrolyte layer can be formed thin and the internal resistance is low; a method for manufacturing an all solid state secondary battery, by which an extremely thin solid electrolyte layer can be formed; and a method for manufacturing an all solid state secondary battery, by which application unevenness of a slurry composition for a solid electrolyte layer is reduced and the internal resistance can be lowered. Specifically disclosed is an all solid state secondary battery which comprises a positive electrode that has a positive electrode active material layer, a negative electrode that has a negative electrode active material layer, and a solid electrolyte layer that is arranged between the positive and negative electrode active material layers.

Abstract: A non-aqueous electrolyte secondary battery including: an electrode group in which a positive electrode and a negative electrode are spirally wound with a separator interposed therebetween; and a non-aqueous electrolyte including a non-aqueous solvent and a lithium salt dissolved in the non-aqueous solvent, the positive electrode including a positive electrode material mixture layer containing a nickel-containing lithium composite metal oxide, wherein a product of A and B equals 150 to 350, A equals 15 to 20%, and B equals 10 to 25%, where A (%) represents a porosity of the positive electrode material mixture layer, and B (%) represents a volume percentage of ethylene carbonate in the non-aqueous solvent.

Abstract: An active material, an electrode, and a battery which exhibit high safety in overcharging tests, and methods of manufacturing them are provided. The active material comprises a first metal oxide particle 1 and a second metal oxide particle group 2 attached to a surface of the first metal oxide particle 1. The second metal oxide is at least one selected from the group consisting of zirconia, silica, and tin oxide. The first metal oxide particle 1 contains fluorine atoms from its surface to deepest part.

Abstract: A main object of the present invention is to provide a solid electrolyte material having excellent Li ion conductivity. To attain the object, the present invention provides a solid electrolyte material represented by a general formula: Lix(La1-aM1a)y(Ti1-bM2b)zO?, wherein “x”, “y”, and “z” satisfy relations of x+y+z=1, 0.850?x/(x+y+z)?0.930, and 0.087?y/(y+z)?0.115; “a” is 0?a?1; “b” is 0?b?1; “67 ” is 0.8???1.2; “M1” is at least one selected from the group consisting of Sr, Na, Nd, Pr, Sm, Gd, Dy, Y, Eu, Tb, and Ba; and “M2” is at least one selected from the group consisting of Mg, W, Mn, Al, Ge, Ru, Nb, Ta, Co, Zr, Hf, Fe, Cr, and Ga.

Abstract: Provided is a lithium ion secondary battery including a laminated body formed by laminating a first electrode layer and a second electrode layer on each other via an electrolytic region, wherein the first electrode layer and the second electrode layer include the same active material, and the active material is Li2MnxMe1?xO3 (Me=Ni, Cu, V, Co, Fe, Ti, Al, Si, or P, and or 0.5£×1).

Abstract: Disclosed is a lithium ion secondary battery that has a simple structure, is easily produced, and wherein short circuits do not arise. The lithium ion secondary battery comprises an active material being contained in a matrix comprising a laminated body that includes a positive current collector and a negative current collector which are laminated on each other via a solid electrolyte layer, the solid electrolyte layer includes an active material in a matrix made of solid electrolyte, and a ratio of the volume of the solid electrolyte and the volume of the active material being 90:10-65:35. Also, the active material may also be contained in a matrix of a conductive substance of the positive current collector and/or the negative current collector.

Abstract: A solid electrolyte material for an all solid-state lithium secondary battery represented by Li2S-MIaSb-MIIxOy, wherein MI is selected from P, Si, Ge, B and Al; “a” and “b” respectively represent numbers that give a stoichiometric ratio in accordance with the kind of MI; MII is selected from Fe, Zn and Bi; and “x” and “y” respectively represent numbers that give a stoichiometric ratio in accordance with the kind of MII.

Abstract: A method for making ion conducting films includes the use of primary inorganic chemicals, which are preferably water soluble; formulating the solution with appropriate solvent, preferably deionized water; and spray depositing the solid electrolyte matrix on a heated substrate, preferably at 100 to 400° C. using a spray deposition system. In the case of lithium, the deposition step is then followed by lithiation or addition of lithium, then thermal processing, at temperatures preferably ranging between 100 and 500° C., to obtain a high lithium ion conducting inorganic solid state electrolyte. The method may be used for other ionic conductors to make electrolytes for various applications. The electrolyte may be incorporated into a lithium ion battery.

Abstract: A non-aqueous electrolyte secondary battery including: an electrode group in which a positive electrode and a negative electrode are spirally wound with a separator interposed therebetween; and a non-aqueous electrolyte including a non-aqueous solvent and a lithium salt dissolved in the non-aqueous solvent, the positive electrode including a positive electrode material mixture layer containing a nickel-containing lithium composite metal oxide, wherein a product of A and B equals 150 to 350, A equals 15 to 20%, and B equals 8 to 25%, where A (%) represents a porosity of the positive electrode material mixture layer, and B (%) represents a volume percentage of ethylene carbonate in the non-aqueous solvent.

Abstract: An all-solid-state secondary battery that includes a positive electrode, a negative electrode, and a solid electrolyte, and which has good moldability and favorable battery characteristics. In the all-solid-state secondary battery, a carbon material having carbon particles with a fracture strength of 100 MPa or less is used for an electrode active material.

Abstract: A method for producing a lithium alkali transition metal oxide for use as a positive electrode material for lithium secondary batteries by a precipitation method. The positive electrode material is a lithium alkali transition metal composite oxide and is prepared by mixing a solid state mixed with alkali and transition metal carbonate and a lithium source. The mixture is thermally treated to obtain a small amount of alkali metal residual in the lithium transition metal composite oxide cathode material.

Abstract: An electrochemical cell in accordance with one embodiment of the invention includes a first electrode containing a first phase intermixed with a second phase and a network of interconnected pores. The first phase contains a ceramic material and the second phase contains an electrically conductive material providing an electrically contiguous path through the first electrode. The electrochemical cell further includes a second electrode containing an alkali metal. A substantially non-porous alkali-metal-ion-selective ceramic membrane, such as a dense Nasicon, Lisicon, Li ??-alumina, or Na ??-alumina membrane, is interposed between the first and second electrodes.

Abstract: To provide a lithium ion conductive inorganic substance that makes it possible to further enhance the charge-discharge voltage of batteries and to further improve the charge-discharge properties of batteries. The lithium ion conductive inorganic substance includes a ZrO2 component from 2.6% to 52.0% by mass on an oxide basis. The lithium ion conductive inorganic substance is preferably used for lithium ion secondary batteries that have a positive electrode layer, a negative electrode layer, and a solid electrolyte layer intervening between the positive electrode layer and the negative electrode layer.

Abstract: An electrode active material for an all solid state secondary battery, which is able to have the controlled orientation of a crystal face at the interface between an electrode layer and an electrolyte layer in order to enhance the battery performance, and an all solid state secondary battery including the electrode active material. The electrode active material includes a carbon material having an intensity ratio (P002/P100) of 600 or less between the X-ray diffraction peak intensity P002 in the (002) plane and the X-ray diffraction peak intensity P100 in the (100) plane, which are obtained when a surface of a compact prepared by compression molding of a powder of the carbon material at a pressure of 110 MPa is irradiated with X-ray. The all solid state secondary battery includes a positive electrode, a negative electrode, and a solid electrolyte, and the negative electrode contains the electrode active material.

Abstract: Li/air battery cells are configurable to achieve very high energy density. The cells include a protected a lithium metal or alloy anode and an aqueous catholyte in a cathode compartment. In addition to the aqueous catholyte, components of the cathode compartment include an air cathode (e.g., oxygen electrode) and a variety of other possible elements.

Abstract: An electrochemical cell including a multi-layer solid-state electrolyte, a battery including the cell, and a method of forming the battery and cell are disclosed. The electrolyte includes a first layer that is compatible with the anode of the cell and a second layer that is compatible with the cathode of the cell. The cell exhibits improved performance compared to cells including a single-layer electrolyte.

Abstract: A method of producing a sulfide solid electrolyte material includes: forming an intermediate having crosslinking sulfur but no Li2S, by vitrifying, in a first vitrification process, a starting material composition obtained by mixing Li2S and a sulfide of a group 14 or group 15 element such that a proportion of Li2S with respect to the sum total of the Li2S and the sulfide of a group 14 or group 15 element is smaller than a proportion of Li2S required for the sulfide solid electrolyte material to obtain an ortho composition; and eliminating the crosslinking sulfur by vitrifying, in a second vitrification process, an intermediate-containing composition resulting from mixing a bond cleaving compound, which cleaves a bond of the crosslinking sulfur, with the intermediate.

Abstract: An electrochemical cell includes a cathode capable of reversibly releasing and receiving an alkali metal; an anode capable of reversibly releasing and receiving the alkali metal; and a non-aqueous electrolyte including one or more dissolved lithium salts, one or more nitriles, sulfur dioxide, and one or more other polar aprotic solvents.

Abstract: Disclosed is a method of preparing a negative electrode for a rechargeable lithium battery. The steps include vacuum-drying a negative electrode precursor, the negative electrode precursor comprising a negative active material and an aqueous binder. The steps may further include vacuum-drying a lithium cell battery that includes a vacuum-dried negative electrode.

Abstract: A first fine particle-containing solution is deposited on an appropriate substrate, and dried to form a first fine particle aggregate layer. Polymer particles are deposited on the first fine particle aggregate layer, and are supplied with a second fine particle-containing solution such that the polymer particles are immersed in the second fine particle-containing solution. The second fine particle-containing solution is dried to form a second fine particle aggregate layer containing a large number of the polymer particles embedded. A first structure precursor is completed at this stage. Then, the first structure precursor is separated from the substrate, and thermally treated. Thus, the production of a first solid electrolyte structure, which has a porous solid electrolyte portion and a dense solid electrolyte portion integrated, is completed.

Abstract: A solid electrolyte structure containing a porous solid electrolyte is prepared. At least the porous solid electrolyte of the solid electrolyte structure is immersed in a first sol solution containing at least a precursor of an electrode active material as a solute. Then, the first sol solution, in which the porous solid electrolyte is immersed, is heated. A solvent of the first sol solution is evaporated by the heating, whereby a pore of the porous solid electrolyte is filled with a high concentration (a large amount) of the electrode active material precursor.

Abstract: A negative electrode structure for aqueous electrolyte comprising at least a negative electrode active material layer, wherein the negative electrode active material layer comprises, as the negative electrode active material, at least one selected from the group consisting of the following metals and alloys comprising at least one of the metals: Li, Na, K, Ca, Mg, Zn, Al and Ag, and wherein a solid electrolyte layer comprising a Zr-containing garnet-type solid electrolyte described by the following formula (1), is provided on one side of the negative electrode active material layer: Formula (1): Li5+xLayZrzO12 wherein 0<x?3, 0?y?3 and 0?z?2.

Abstract: It is difficult to display the polarity of terminal electrodes of lithium ion batteries. With conventional lithium ion secondary batteries, since different materials are employed for the active substances that make up a positive electrode and a negative electrode, problems arise if the polarities of the electrodes are mistaken when the battery is installed. A battery has been developed using an active substance material functioning as a secondary battery even when the same material is used for the active substances that make up the positive electrode and the negative electrode, and a non-polar secondary battery has been produced. With no distinction between the terminal electrodes, attention does not need to be paid to the direction of installation, thereby simplifying the installation step. Furthermore, since there is no need to manufacture a positive electrode layer and a negative electrode layer separately, the step for manufacturing the battery is also simplified.

Abstract: The present invention provides an electrochemical cell comprising an anodic current collector in contact with an anode. A cathodic current collector is in contact with a cathode. A solid electrolyte thin-film separates the anode and the cathode.

Abstract: A composite solid electrolyte includes a monolithic solid electrolyte base component that is a continuous matrix of an inorganic active metal ion conductor and a filler component used to eliminate through porosity in the solid electrolyte. In this way a solid electrolyte produced by any process that yields residual through porosity can be modified by the incorporation of a filler to form a substantially impervious composite solid electrolyte and eliminate through porosity in the base component. Such composites may be made by disclosed techniques. The composites are generally useful in electrochemical cell structures such as battery cells and in particular protected active metal anodes, particularly lithium anodes, that are protected with a protective membrane architecture incorporating the composite solid electrolyte.

Abstract: A main object of the present invention is to provide a method for producing a solid electrolyte material-containing sheet excellent in strength. The present invention attains the object by providing a method for producing a solid electrolyte material-containing sheet comprising the steps of: preparing a raw material composition containing a sulfide solid electrolyte material and a binder composition containing a monomer or oligomer having a double bond and a radical polymerization initiator; applying the raw material composition to form a sheet-shaped composition; and polymerizing the sheet-shaped composition by radical polymerization.

Abstract: A variety of compositions that include a metal oxide, films and batteries comprising one or more of the compositions, and methods of making the same.

Abstract: Metal complex salts may be used in lithium ion batteries. Such metal complex salts not only perform as an electrolyte salt in a lithium ion batteries with high solubility and conductivity, but also can act as redox shuttles that provide overcharge protection of individual cells in a battery pack and/or as electrolyte additives to provide other mechanisms to provide overcharge protection to lithium ion batteries. The metal complex salts have at least one aromatic ring. The aromatic moiety may be reversibly oxidized/reduced at a potential slightly higher than the working potential of the positive electrode in the lithium ion battery. The metal complex salts may also be known as overcharge protection salts.

Abstract: An all-solid-state battery includes: a positive electrode having a positive electrode current collector and a positive electrode layer on the positive electrode current collector; a negative electrode having a negative electrode current collector and a negative electrode layer on the negative electrode current collector; and an electrolyte between the positive and negative electrodes. The electrolyte is made of a first solid-state electrolyte having lithium ionic conductivity. The positive electrode layer includes a base portion and an active material portion. The base portion is made of a second solid-state electrolyte having lithium ionic conductivity in a continuous phase. The active material portion is dispersed in the base portion, and includes a positive electrode active material. The first and second solid-state electrolytes are lithium ionic conductive material having a hydride solid-state electrolyte, respectively.

Abstract: A main object of the present invention is to provide a Li-La-Ti-O based solid electrolyte material having high Li ion conductivity in the crystal grain boundary. The present invention attains the object by providing solid electrolyte material represented by a general formula: Li3x(La(2/3?x)?aM1a) (Ti1?bM2b)O3, wherein “x” is 0<x<0.17; “a” is 0?a?0.5; “b” is 0?b?0.5; “M1” is at least one selected from the group consisting of Sr, Na, Nd, Pr, Sm, Gd, Dy, Y, Eu, Tb, and Ba; and “M2” is at least one selected from the group consisting of Mg, W, Mn, Al, Ge, Ru, Nb, Ta, Co, Zr, Hf, Fe, Cr, and Ga, and wherein the solid electrolyte material is a crystalline material, is in thin film form, and has a thickness of 250 nm to 850 nm.

Abstract: In the all-solid secondary battery of the present invention, a positive electrode layer and a negative electrode layer are disposed on both sides of a solid electrolyte layer, a first inorganic solid electrolyte and a second inorganic solid electrolyte are included into at least one of the positive electrode layer, the negative electrode layer, and the solid electrolyte layer, the content of transition metal in the first inorganic solid electrolyte is less than 15% by mass on oxide basis, and the content of transition metal in the second inorganic solid electrolyte is 15% by mass or more on oxide basis.

Abstract: The invention relates to a solid-state lithium-ion thin-film electrolyte that, compared to the current state-of-the-art thin-film electrolyte, Lipon, exhibits an equal or larger electrochemical stability window (0-5.5 V vs. Li+/Li), an equal or smaller electronic conductivity (10?14 S/cm at 25° C.), the same ideal transference number for Li+ ions (t=1.000), and a 10× higher Li+ ion conductivity at ?40° C. Latter provides thin-film batteries (TFBs) with at least a 5× higher power performance at ?40° C. over the current state-of-the-art Lipon TFBs.

Abstract: A solid battery that includes a positive electrode layer, a negative electrode layer, and a solid electrolyte layer. The positive electrode layer and the negative electrode layer include an electrode active material. The solid electrolyte layer includes a solid electrolyte. A LiZr2(PO4)3-containing layer is provided between the solid electrolyte layer and at least one of the positive electrode layer and the negative electrode layer.

Abstract: A solid electrolyte for a rechargeable lithium battery includes a compound represented by Li1+xTi2?xAlxMy(PO4)3-y, and a glass-based oxide selected from LiPO3, Li2O—B2O3, and combinations thereof. A rechargeable lithium battery includes the solid electrolyte.

Abstract: A lithium ion conducting material includes a sulfide-based solid electrolyte material that contains Li, an element that belongs to group 13 to group 15 and S, and that contains an MSx unit, wherein M is an element that belongs to group 13 to group 15, S is a sulfur element, and x is the maximum number of S atoms that can be bonded with M, and an inhibitor that is in contact with the sulfide-based solid electrolyte material and that contains a metal element having an ionization tendency lower than that of hydrogen.

Abstract: The present invention provides a lithium secondary battery which has improved safety, mainly coming from use of an electrolyte solution which is not inflammable at room temperature (20° C.), while not deteriorating output characteristics at low temperatures and room temperature or output maintenance characteristics after storage at high temperature (50° C.). The lithium secondary battery of the present invention, encased in a container, is provided with a cathode and an anode, both capable of storing/releasing lithium ions, a separator which separates these electrodes from each other, and an electrolyte solution containing a cyclic carbonate and a linear carbonate as solvents and a compound such as VC at composition ratios of 18.0 to 30.0%, 74.0 to 81.9% and 0.1 to 1.0%, respectively, based on the whole solvents, all percentages by volume.

Abstract: An object of the present invention is to provide an electrolyte solution for lithium-ion secondary batteries comprising a tetraalkylphosphonium salt which improves the cycle characteristics and safety of lithium-ion batteries, and to provide a lithium-ion secondary battery using the electrolyte solution. Disclosed is an electrolyte comprising a tetraalkylphosphonium salt represented by general formula (1) wherein R1 represents a linear, branched or alicyclic alkyl group having 2 to 6 carbon atoms and R2 represents a linear, branched or alicyclic alkyl group having 1 to 14 carbon atoms, provided that R1 and R2 are different from each other and the total number of carbon atoms in the phosphonium cation is 20 or less; and X represents an anion.

Abstract: A battery capable of improving the storage characteristics and the cycle characteristics is provided. The battery includes a cathode, an anode, and an electrolytic solution. The electrolytic solution is impregnated in a separator provided between the cathode and the anode. A solvent of the electrolytic solution contains a given sulfone compound such as bis(trimethylsilyl)-2,2-difluorosulfoacetate. Compared to a case that a solvent does not contain the foregoing sulfone compound, the chemical stability of the electrolytic solution is improved, and the decomposition reaction of the electrolytic solution is suppressed.

Abstract: Amorphous lithium lanthanum zirconium oxide (LLZO) is formed as an ionically-conductive electrolyte medium. The LLZO comprises by percentage of total number of atoms from about 0.1% to about 50% lithium, from about 0.1% to about 25% lanthanum, from about 0.1% to about 25% zirconium, from about 30% to about 70% oxygen and from 0.0% to about 25% carbon. At least one layer of amorphous LLZO may be formed through a sol-gel process wherein quantities of lanthanum methoxyethoxide, lithium butoxide and zirconium butoxide are dissolved in an alcohol-based solvent to form a mixture which is dispensed into a substantially planar configuration, transitioned through a gel phase, dried and cured to a substantially dry phase.

Abstract: A sulfide solid electrolyte with excellent ion conductivity and a method for producing a crystallized glass contained in the sulfide solid electrolyte. A sulfide solid electrolyte comprising a crystallized glass represented by the following chemical formula yLi2S.(100-x-y)P2S5.xP2O5, wherein 0<x<25 and 67<y<80.

Abstract: An electrochemical method for manufacturing a lithium phosphate (Li3PO4) thin film includes preparing an electroplating solution and forming the lithium phosphate thin film on a conductive substrate under suitable conditions. The electroplating bath includes about 10?2M to about 10?1M lithium ion and about 10?2 M to about 1 M monohydrogen phosphate ion (HPO42?) or dihydrogen phosphate ion (H2PO4?).

Abstract: Provided is a nonaqueous electrolyte battery having a high charge-discharge cycle capability in which the battery capacity is less likely to decrease even after repeated charge and discharge. The nonaqueous electrolyte battery includes a positive-electrode layer 1, a negative-electrode layer 2, a solid electrolyte layer 3 interposed between the positive-electrode layer 1 and the negative-electrode layer 2, and a boundary layer 4 between the negative-electrode layer 2 and the solid electrolyte layer 3, the boundary layer 4 maintaining the bond between the negative-electrode layer 2 and the solid electrolyte layer 3. The negative-electrode layer 2 at least contains Li. The boundary layer 4 at least contains a group 14 element in the periodic table. The boundary layer 4 has a thickness of 50 nm or less.

Abstract: A composition comprised of nanoparticles of lithium ion conducting solid oxide material, wherein the solid oxide material is comprised of lithium ions, and at least one type of metal ion selected from pentavalent metal ions and trivalent lanthanide metal ions. Solution methods useful for synthesizing these solid oxide materials, as well as precursor solutions and components thereof, are also described. The solid oxide materials are incorporated as electrolytes into lithium ion batteries.

Abstract: A first paste for a first electrode layer and a second paste for a second electrode layer are printed on a fired solid electrolyte by screen printing, etc. to form electrode patterns for forming the first electrode layer and the second electrode layer. The first and second pastes can be prepared by dissolving a binder in an organic solvent, adding an appropriate amount of the obtained solution to powders of an electrode active substance material and a solid electrolyte material, and kneading the resultant mixture. The first and second pastes are applied to the fired solid electrolyte to form a cell precursor, the cell precursor is placed in a hot press mold subjected to a thermal treatment while pressing from above by a punch, whereby the first and second electrode layer are formed from the first and second pastes.

Abstract: A primary cell having an anode comprising lithium and a cathode comprising iron disulfide (FeS2) and carbon particles. The cell can be in the configuration of a coin cell or the anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added. The electrolyte comprises a lithium salt dissolved in a nonaqueous solvent mixture which may include an organic cyclic carbonate such as ethylene carbonate and propylene carbon. The cell after assembly is subjected to a two step preconditioning (prediscahrge) protocol involving at least two distinct discharge steps having at lease one cycle of pulsed current drain in each step and at least one rest period (step rest) between said two steps, wherein said step rest period is carried out for a period of time at above ambient temperature. The preconditioning improves cell performance.

Abstract: A battery capable of improving cycle characteristics and a manufacturing yield is provided. An anode includes: an anode current collector; and an anode active material layer arranged on the anode current collector, in which the anode active material layer includes an anode active material including a plurality of pores, and the rate of change in the amount of mercury intruded into the plurality of pores is distributed so as to have a peak in a diameter range from 80 nm to 1200 nm both inclusive, the amount of mercury intruded being measured by mercury porosimetry.