Ngk Insulators, Inc.

Shohei Yokoyama

Nobuyuki Kobayashi

Sho Yamamoto

Tsutomu Nanataki

Naoko Inukai

Sota Okochi

Naohito Yamada

Yukihisa Takeuchi

Ryuta Sugiura

Megumi Fujisaki

Yukinobu Yura

Kei Sato

Koji Kimura

Iwao Ohwada

Naoto Ohira

Akira Urakawa

Kouichi Kondou

Miho Endo

Provided is a layered double hydroxide (LDH) separator including a porous substrate made of a polymeric material, and LDH with which pores of the porous substrate are plugged. The LDH separator has a plurality of remaining flattened pores, longitudinal directions of the pores being non-parallel to a thickness direction of the LDH separator.

LDH separator and zinc secondary battery

There is provided a functional layer including layered double hydroxide. The functional has an average porosity of 1 to 40% and an average pore diameter of 100 nm or less.

Functional layer including layered double hydroxide, and composite material

Provided is a layered double hydroxide (LDH) separator capable of more effectively restraining short circuiting caused by zinc dendrites. The LDH separator includes a porous substrate made of a polymer material and LDH plugging pores in the porous substrate, and has a linear transmittance of 1% or more at a wavelength of 1000 nm.

LDH separator and secondary zinc battery

Provided is a layered double hydroxide (LDH) separator including a porous substrate made of a polymeric material; and a hydroxide-ion conductive layered compound being a LDH and/or a LDH-like compound with which pores of the porous substrate are plugged. The LDH separator has a mean porosity of 0.03% to less than 1.0%.

Provided is a hydroxide ion-conductive separator including a porous substrate and a layered double hydroxide (LDH)-like compound filling pores of the porous substrate, wherein the LDH-like compound is a hydroxide and/or an oxide with a layered crystal structure, containing: Mg; and one or more elements, which include at least Ti, selected from the group consisting of Ti, Y, and Al.

Hydroxide ion conductive separator and zinc secondary battery

A layered double hydroxide (LDH) separator capable of more effectively restraining short circuiting caused by zinc dendrites. The LDH separator for secondary zinc batteries includes a porous substrate made of a polymer material and a LDH plugging pores in the porous substrate. The LDH separator has a dendrite buffer layer therein, the dendrite buffer layer being at least one selected from the group consisting of: (i) a pore-rich internal porous layer in the porous substrate, the internal porous layer being free from the LDH or deficient in the LDH; (ii) a releasable interfacial layer; which is provided by two adjacent layers constituting part of the LDH separator in releasable contact with each other; and (iii) an internal gap layer free from the LDH and the porous substrate, which is provided by two adjacent layers constituting part of the LDH separator formed apart from each other.

LDH separator and secondary zinc battery with dendrite buffer layer

Provided is an LDH separator including a porous substrate and a layered double hydroxide (LDH) that fills up pores of the porous substrate. The LDH is composed of a plurality of hydroxide base layers containing Mg, Al, Ti, and OH group; and interlayers which are interposed between the plurality of hydroxide base layers and composed of anions and HO.

Provided is a layered double hydroxide (LDH) separator comprising a porous substrate made of a polymeric material; and a LDH with which pores of the porous substrate are plugged. A central region along the thickness of the LDH separator has a lower mean porosity than peripheral regions along the thickness of the LDH separator.

Provided is a layered double hydroxide (LDH) separator including a porous substrate made of a polymeric material; and a LDH with which pores of the porous substrate are plugged. The LDH separator has a mean porosity of 0.03% to less than 1.0%.

LDH separator and zinc secondary cell

There is provided a functional layer including a layered double hydroxide (LDH). The functional layer includes a first layer with a thickness of 0.10 &#x3bc;m or more, the first layer being composed of fine LDH particles having a diameter of less than 0.05 &#x3bc;m, and a second layer composed of large LDH particles having a mean particle diameter of 0.05 &#x3bc;m or more, the second layer being an outermost layer provided on the first layer.

There is provided a functional layer including a layered double hydroxide. The functional layer further contains titania.

A battery including, as a separator, a functional layer including a layered double hydroxide that contains Ni, Al, Ti and Zn, and has an atomic ratio Zn/(Ni+Ti+AI+Zn) of 0.04 or more determined by an energy dispersive X-ray analysis (EDS).

Provided is a battery including a layered double hydroxide. The battery includes a positive electrode, a negative electrode, an electrolytic solution being an aqueous alkali metal hydroxide solution, and a layered double hydroxide having a fundamental composition represented by the formula: MM(OH)A&#xb7;mHO where Mrepresents a divalent cation, Mrepresents a trivalent cation, Arepresents an n-valent anion, n is an integer of 1 or more, x is 0.1 to 0.4, and m is any real number, the layered double hydroxide being in contact with the electrolytic solution, wherein a metal compound containing a metal corresponding to Mand/or Mis dissolved in the electrolytic solution such that erosion of the layered double hydroxide by the electrolytic solution is suppressed. The present invention provides a highly reliable battery such that the degradation of a layered double hydroxide (LDH) contained in the battery can be significantly reduced.

Battery using layered double hydroxide

Provided is a layered double hydroxide membrane containing a layered double hydroxide represented by the formula: MM(OH)A.mHO (where Mrepresents a divalent cation, Mrepresents a trivalent cation, Arepresents an n-valent anion, n is an integer of 1 or more, and x is 0.1 to 0.4), the layered double hydroxide membrane having water impermeability. The layered double hydroxide membrane includes a dense layer having water impermeability, and a non-flat surface structure that is rich in voids and/or protrusions and disposed on at least one side of the dense layer. The present invention provides an LDH membrane suitable for use as a solid electrolyte separator for a battery, the LDH membrane including a dense layer having water impermeability, and a specific structure disposed on at least one side of the dense layer and suitable for reducing the interfacial resistance between the LDH membrane and an electrolytic solution.

Layered double hydroxide film and composite material containing layered double hydroxide

Provided is a layered-double-hydroxide-containing composite material including a porous substrate and a functional layer disposed on and/or in the porous substrate, the functional layer containing a layered double hydroxide represented by the formula MM(OH)A.mHO, where Mrepresents a divalent cation, Mrepresents a trivalent cation, Arepresents an n-valent anion, n is an integer of 1 or more, and x is 0.1 to 0.4, and the functional layer further containing sulfur (S) at the interface between the functional layer and the porous substrate and in the vicinity of the interface. In the LDH-containing composite material of the present invention, the LDH-containing functional layer disposed on and/or in the porous substrate exhibits significantly improved conductivity.

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Nagoya, Japan

Shohei Yokoyama