JP2010231969A5

JP2010231969A5 -

Info

Publication number: JP2010231969A5
Application number: JP2009077112A
Authority: JP
Filing date: 2009-03-26
Publication date: 2012-04-12
Anticipated expiration: 2029-03-26

Description

上記の課題を解決するため、本発明は、第１の正極側導電層、第１の負極側導電層、前記第１の正極側導電層と前記第１の負極側導電層との間に配置された第１の固体電解質層と、を含む第１の単位電池層と、第２の正極側導電層、第２の負極側導電層、前記第２の正極側導電層と前記第２の負極側導電層との間に配置された第２の固体電解質層と、を含む第２の単位電池層と、前記第１の正極側導電層と前記第２の正極側導電層とを接続する第１の接続部と、前記第１の負極側導電層と前記第２の負極側導電層とを接続する第２の接続部と、前記第１の正極側導電層と前記第２の正極側導電層との間、及び前記第１の負極側導電層と前記第２の負極側導電層との間の少なくとも一方に配置される接着剤と、を含み、前記第１の正極側導電層の領域と前記第２の正極側導電層の領域、及び／または前記第１の負極側導電層の領域と前記第２の負極側導電層の領域は、前記第１の固体電解質層の領域及び前記第２の固体電解質層の領域より大きいことを特徴とする固体二次電池である。
前記接着剤は、前記第１の固体電解質層と前記第２の固体電解質層との間に配置されてもよい。
前記第１の接続部は、前記第１の正極側導電層及び前記第２の正極側導電層を貫通するように配置される第１の導電部材を含み、前記第２の接続部は、前記第１の負極側導電層及び前記第２の負極側導電層を貫通するように配置される第２の導電部材を含んでもよい。
前記第１の単位電池層及び前記第２の単位電池層は基体の上に配置されてもよい。
前記基体はプラスチックフィルムからなり、前記基体と前記第１の単位電池層及び前記第２の単位電池層とは接着剤を介して接着されてもよい。
本発明は、上述した固体二次電池の製造方法であって、第１基板上に第１分離層を形成する第１工程と、前記第１分離層上に前記第１の固体電解質層を含む前記第１の単位電池層を形成する第２工程と、第２基板上に前記第２の固体電解質層を含む前記第２の単位電池層を形成する第３工程と、前記第１の単位電池層の上面と前記第２の単位電池層の上面とを接着剤で接着する第４工程と、前記第１分離層に光を照射し、前記第１分離層の層内又は前記第１分離層と接する他の層との境界面で剥離を生じさせ、前記第１基板と前記第１の単位電池層とを分離する第５工程と、前記第１の単位電池層と前記第２の単位電池層の正極側の導電層同士を第１導電部材で接続し、前記第１単位電池層と前記第２単位電池層の負極側の導電層同士を第２導電部材で接続する第６工程と、を含むことを特徴とする固体二次電池の製造方法である。
前記第２基板は第２分離層を有し、前記第３工程において前記第２の単位電池層は前記第２分離層上に形成され、前記第５工程と前記第６工程との間に、前記第２基板、前記第２の単位電池層及び前記第１の単位電池層が接着された状態でこれらを２分割する第７工程と、前記２分割された各々の前記第１の単位電池層の上面同士を接着する第８工程と、前記第２基板のどちらか一方の前記第２分離層に光を照射し、前記第２分離層の層内又は前記第２分離層と接する他の層との境界面で剥離を生じさせ、前記どちらか一方の前記第２基板を分離する第９工程と、を有してもよい。
本発明の固体二次電池は、一対の導電層の間に固体電解質層を挟持してなる単位電池層を接着剤を介して基板上に複数積層し、複数の前記単位電池層の正極側の導電層同士を第１導電部材で接続し、負極側の導電層同士を第２導電部材で接続してなることを特徴とする。 In order to solve the above-described problems, the present invention provides a first positive electrode side conductive layer, a first negative electrode side conductive layer, and the first positive electrode side conductive layer and the first negative electrode side conductive layer. A first unit battery layer including a first solid electrolyte layer, a second positive electrode side conductive layer, a second negative electrode side conductive layer, the second positive electrode side conductive layer, and the second negative electrode A second unit cell layer including a second solid electrolyte layer disposed between the first conductive layer and the second positive electrode side conductive layer. 1 connecting portion, a second connecting portion connecting the first negative electrode side conductive layer and the second negative electrode side conductive layer, the first positive electrode side conductive layer and the second positive electrode side conductive layer. An adhesive disposed between the first negative electrode side conductive layer and at least one of the first negative electrode side conductive layer and the second negative electrode side conductive layer, and the first positive electrode side conductive layer The region and the region of the second positive electrode side conductive layer and / or the region of the first negative electrode side conductive layer and the region of the second negative electrode side conductive layer are the region of the first solid electrolyte layer and the region of the first negative electrode side conductive layer. The solid secondary battery is larger than the region of the second solid electrolyte layer.
The adhesive may be disposed between the first solid electrolyte layer and the second solid electrolyte layer.
The first connection portion includes a first conductive member disposed so as to penetrate the first positive electrode side conductive layer and the second positive electrode side conductive layer, and the second connection portion includes: You may include the 2nd conductive member arrange | positioned so that the 1st negative electrode side conductive layer and the said 2nd negative electrode side conductive layer may be penetrated.
The first unit cell layer and the second unit cell layer may be disposed on a substrate.
The base may be made of a plastic film, and the base may be bonded to the first unit battery layer and the second unit battery layer via an adhesive.
The present invention is a method for manufacturing the above-described solid secondary battery, which includes a first step of forming a first separation layer on a first substrate, and the first solid electrolyte layer on the first separation layer. A second step of forming the first unit cell layer; a third step of forming the second unit cell layer including the second solid electrolyte layer on a second substrate; and the first unit cell. A fourth step of bonding the upper surface of the layer and the upper surface of the second unit battery layer with an adhesive; and irradiating the first separation layer with light to within the layer of the first separation layer or the first separation layer A fifth step of separating the first substrate and the first unit cell layer by causing separation at a boundary surface with another layer in contact with the first unit cell, and the second unit cell. The conductive layers on the positive electrode side of the layers are connected by the first conductive member, and the conductive layers on the negative electrode side of the first unit cell layer and the second unit cell layer are connected to the second layer. It is a manufacturing method of a solid-state secondary battery which comprises a sixth step of connecting with conductive member.
The second substrate has a second separation layer, and in the third step, the second unit cell layer is formed on the second separation layer, and between the fifth step and the sixth step, A seventh step of dividing the second substrate, the second unit cell layer, and the first unit cell layer into two in a state where the second unit cell layer and the first unit cell layer are bonded; and each of the first unit cell layers divided into two An eighth step of bonding the upper surfaces of the second substrate, and irradiating light to the second separation layer of either one of the second substrates, and the other layer in the layer of the second separation layer or in contact with the second separation layer And a ninth step of separating one of the second substrates.
In the solid secondary battery of the present invention, a plurality of unit battery layers each having a solid electrolyte layer sandwiched between a pair of conductive layers are laminated on a substrate via an adhesive, and a plurality of unit battery layers on the positive electrode side are stacked. Conductive layers are connected by a first conductive member, and conductive layers on the negative electrode side are connected by a second conductive member.

Claims

  A first positive electrode side conductive layer, a first negative electrode side conductive layer, and a first solid electrolyte layer disposed between the first positive electrode side conductive layer and the first negative electrode side conductive layer. A first unit cell layer;
  A second positive electrode side conductive layer, a second negative electrode side conductive layer, and a second solid electrolyte layer disposed between the second positive electrode side conductive layer and the second negative electrode side conductive layer. A second unit cell layer;
  A first connection portion connecting the first positive electrode side conductive layer and the second positive electrode side conductive layer;
  A second connecting portion connecting the first negative electrode side conductive layer and the second negative electrode side conductive layer;
  Adhesive disposed between the first positive electrode side conductive layer and the second positive electrode side conductive layer and between at least one of the first negative electrode side conductive layer and the second negative electrode side conductive layer. Agent,
Including
  The region of the first positive electrode side conductive layer and the region of the second positive electrode side conductive layer and / or the region of the first negative electrode side conductive layer and the region of the second negative electrode side conductive layer are A solid secondary battery characterized in that it is larger than the area of one solid electrolyte layer and the area of the second solid electrolyte layer.

The solid secondary battery according to claim 1, wherein the adhesive is disposed between the first solid electrolyte layer and the second solid electrolyte layer.

The first connection portion includes a first conductive member disposed so as to penetrate the first positive electrode side conductive layer and the second positive electrode side conductive layer,
3. The second connection portion includes a second conductive member disposed so as to penetrate the first negative electrode side conductive layer and the second negative electrode side conductive layer. The solid secondary battery described in 1.

4. The solid secondary battery according to claim 1, wherein the first unit battery layer and the second unit battery layer are disposed on a substrate. 5.

The solid substrate according to claim 4, wherein the substrate is made of a plastic film, and the substrate, the first unit cell layer, and the second unit cell layer are bonded via an adhesive. Next battery.

  A method for producing a solid secondary battery according to any one of claims 1 to 5,
  A first step of forming a first separation layer on the first substrate;
  A second step of forming the first unit cell layer including the first solid electrolyte layer on the first separation layer;
  Forming a second unit cell layer including the second solid electrolyte layer on a second substrate;
  A fourth step of bonding the upper surface of the first unit cell layer and the upper surface of the second unit cell layer with an adhesive;
  The first separation layer is irradiated with light to cause peeling at a boundary surface between the first separation layer or another layer in contact with the first separation layer, and the first substrate and the first unit. A fifth step of separating the battery layer;
  Conductive layers on the positive side of the first unit battery layer and the second unit battery layer are connected by a first conductive member, and a conductive layer on the negative side of the first unit battery layer and the second unit battery layer. A sixth step of connecting each other with a second conductive member;
The manufacturing method of the solid secondary battery characterized by including.

  The second substrate has a second separation layer;
  In the third step, the second unit cell layer is formed on the second separation layer,
  Between the fifth step and the sixth step,
  A seventh step of dividing the second substrate, the second unit cell layer and the first unit cell layer into two in a state where the second unit cell layer and the first unit cell layer are bonded;
  An eighth step of bonding the upper surfaces of the first unit cell layers divided into the two parts;
  Irradiating light to the second separation layer of either one of the second substrates, causing peeling at a boundary surface with the second separation layer or another layer in contact with the second separation layer, And a ninth step of separating one of the second substrates. The method of manufacturing a solid secondary battery according to claim 6.