JPWO2018116983A1 - 全固体電池の製造方法および製造装置 - Google Patents
全固体電池の製造方法および製造装置 Download PDFInfo
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- 229910001416 lithium ion Inorganic materials 0.000 description 10
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- -1 y O 1-z N 2 Chemical class 0.000 description 3
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- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 description 2
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- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 150000003568 thioethers Chemical class 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910018111 Li 2 S-B 2 S 3 Inorganic materials 0.000 description 1
- 229910018127 Li 2 S-GeS 2 Inorganic materials 0.000 description 1
- 229910018130 Li 2 S-P 2 S 5 Inorganic materials 0.000 description 1
- 229910018133 Li 2 S-SiS 2 Inorganic materials 0.000 description 1
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 229910009290 Li2S-GeS2-P2S5 Inorganic materials 0.000 description 1
- 229910009324 Li2S-SiS2-Li3PO4 Inorganic materials 0.000 description 1
- 229910009318 Li2S-SiS2-LiI Inorganic materials 0.000 description 1
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- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
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- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 229910001386 lithium phosphate Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229910052752 metalloid Inorganic materials 0.000 description 1
- 150000002738 metalloids Chemical class 0.000 description 1
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- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- TWQULNDIKKJZPH-UHFFFAOYSA-K trilithium;phosphate Chemical compound [Li+].[Li+].[Li+].[O-]P([O-])([O-])=O TWQULNDIKKJZPH-UHFFFAOYSA-K 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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Abstract
Description
まず、図1により、全固体電池1の構造について説明する。図1に示すように、全固体電池1は、正極層2と負極層3との間に固体電解質層4が配置されているとともに、これらの正極層2と負極層3との外面にそれぞれ集電体(正極集電体5と負極集電体6)が配置されて接続されている構成とされている。なお、正極層2と負極層3と固体電解質層4とは、それぞれ粉体が成膜されて形成されて全固体電池1を構成する層であるため、粉体成膜層とも称し、この実施の形態では、正極層2を第1の粉体成膜層、固体電解質層4を第2の粉体成膜層、負極層3を第3の粉体成膜層とも称す。
正極集電体5や負極集電体6の材質としては、銅(Cu)、マグネシウム(Mg)、ステンレス鋼、チタン(Ti)、鉄(Fe)、コバルト(Co)、ニッケル(Ni)、亜鉛(Zn)、アルミニウム(Al)、ゲルマニウム(Ge)、インジウム(In)、リチウム(Li)、錫(Sn)、またはこれらの合金等から成る板状体や箔状体が用いられる。本実施の形態においては、正極集電体5としてはアルミ箔を採用し、負極集電体6としては銅箔を採用している。
本実施例では、正極集電体5として厚さ20μmのエッチングしたアルミニウムを用いた。正極層2としては、正極活物質としてLiNi0.8Co0.15Al0.05O2を用いるとともに、正極合材混合物としてリチウムイオン電導性固体電解質のLi2S(80mol%)−P2S5(20mol%)を用いて、正極活物質と固体電解質とが重量比で7:3の割合となるように混合した合材を用いた。
Claims (11)
- 正極層と負極層との間に固体電解質層が配置され、これらの正極層と負極層とにそれぞれ集電体が配置される全固体電池の製造方法であって、
正極層、負極層、および固体電解質層のうち少なくとも一層の粉体層を成膜して粉体成膜層を形成する工程と、
前記粉体成膜層の成膜表面に対し、弾性体からなる押圧体により押圧する押圧工程と、
を有することを特徴とする全固体電池の製造方法。 - 正極層、負極層、および固体電解質層がそれぞれ粉体層から成膜された粉体成膜層として形成され、各粉体成膜層の成膜表面に対し、弾性体からなる押圧体によりそれぞれ押圧する押圧工程を有することを特徴とする請求項1に記載の全固体電池の製造方法。
- 弾性体からなる押圧体の粉体成膜層に接触する表面に、弾性体よりも延伸性の低い表面シートが設けられ、前記押圧工程において、前記表面シートが設けられた弾性体からなる押圧体により押圧することを特徴とする請求項1に記載の全固体電池の製造方法。
- 弾性体を外周から囲む外周囲み材が設けられ、前記押圧工程において、前記外周囲み材により囲まれた弾性体からなる押圧体により押圧することを特徴とする請求項1に記載の全固体電池の製造方法。
- 弾性体の弾性係数が100MPa以下であることを特徴とする請求項1に記載の全固体電池の製造方法。
- 前記押圧工程での押圧の圧力が10MPa以下であることを特徴とする請求項1に記載の全固体電池の製造方法。
- 前記表面シートが金属箔であることを特徴とする請求項3に記載の全固体電池の製造方法。
- 前記表面シートの厚さが100μm以下であることを特徴とする請求項3に記載の全固体電池の製造方法。
- 正極層と負極層との間に固体電解質層が配置され、これらの正極層と負極層とにそれぞれ集電体が配置される全固体電池を製造する全固体電池の製造装置であって、
正極層、負極層、および固体電解質層のうち少なくとも一層の粉体成膜層を押圧する押圧体を備え、前記押圧体が弾性体であることを特徴とする全固体電池の製造装置。 - 前記弾性体の押圧する表面に、弾性体よりも延伸性の低い表面シートが設けられていることを特徴とする請求項9に記載の全固体電池の製造装置。
- 前記弾性体を外周から囲む外周囲み材が設けられていることを特徴とする請求項9に記載の全固体電池の製造装置。
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