JP2022532429A - 全固体電池用の電解質膜及びそれを含む全固体電池 - Google Patents
全固体電池用の電解質膜及びそれを含む全固体電池 Download PDFInfo
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- 229910000664 lithium aluminum titanium phosphates (LATP) Inorganic materials 0.000 description 1
- 229910000625 lithium cobalt oxide Inorganic materials 0.000 description 1
- 229910002102 lithium manganese oxide Inorganic materials 0.000 description 1
- QEXMICRJPVUPSN-UHFFFAOYSA-N lithium manganese(2+) oxygen(2-) Chemical class [O-2].[Mn+2].[Li+] QEXMICRJPVUPSN-UHFFFAOYSA-N 0.000 description 1
- BFZPBUKRYWOWDV-UHFFFAOYSA-N lithium;oxido(oxo)cobalt Chemical compound [Li+].[O-][Co]=O BFZPBUKRYWOWDV-UHFFFAOYSA-N 0.000 description 1
- VROAXDSNYPAOBJ-UHFFFAOYSA-N lithium;oxido(oxo)nickel Chemical compound [Li+].[O-][Ni]=O VROAXDSNYPAOBJ-UHFFFAOYSA-N 0.000 description 1
- URIIGZKXFBNRAU-UHFFFAOYSA-N lithium;oxonickel Chemical compound [Li].[Ni]=O URIIGZKXFBNRAU-UHFFFAOYSA-N 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- BCVXHSPFUWZLGQ-UHFFFAOYSA-N mecn acetonitrile Chemical compound CC#N.CC#N BCVXHSPFUWZLGQ-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910021382 natural graphite Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical class [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229920001197 polyacetylene Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000131 polyvinylidene Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920005608 sulfonated EPDM Polymers 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 239000006234 thermal black Substances 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- 229920001959 vinylidene polymer Polymers 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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Abstract
Description
[化学式1]
-[PA]n-[PB]m- 。
-[PA]n-[PB]m-
1.固体電解質膜の製造
実施例1
溶媒であるテトラヒドロフラン(THF)に、ポリスチレン-ポリエチレンオキシドブロック共重合体(Polystyrene-co-Polyethylene oxide、PS-b-PEO、イオン伝導度:8×10-8S/cm 常温条件))と、ポリエチレンオキシド(Polyethyleneoxide(PEO)、分子量(Mn):600kg/mol)と、を重量比で2:8の割合で投入して5wt%の高分子溶液を準備した。前記PS-b-PEOは、ポリスチレン(PS)ブロックとポリエチレンオキシド(PEO)ブロックの末端同士が結合した共重合体であり、共重合体内でPSブロックの分子量(Mn)は60kg/molであり、PEOブロックの分子量(Mn)は18kg/molであった。この際、リチウム塩として、LiTFSIを[EO]/[Li+]=18/1(モル比)となるように共に入れた。前記高分子溶液で前記投入されたPS-b-PEOとPEOとリチウム塩とが充分に溶けるように60℃で一晩中撹拌した。前記高分子溶液をスピンコーティングによって1000rpmで1分間コーティングした後、常温の真空条件で一晩中乾燥した。このような方式で固体電解質膜を得た。得られた固体電解質膜の厚さは、約30μmであった。
PS-b-PEOとPEOの含量を4:6の重量比にし、厚さを30μmにしたことを除いては、実施例1と同様の方法で固体電解質膜を得た。
PS-b-PEOとPEOの含量を5:5の重量比にし、この際、PS-b-PEOは、PSブロックとPEOブロックとの末端同士が結合したブロック共重合体であり、前記共重合体内でPSブロックの分子量(Mn)は26kg/molであり、イオン伝導度は5×10-7S/cm(常温条件)、PEOブロックの分子量(Mn)は32kg/mol、厚さは30μmにしたことを除いては、実施例1と同様の方法で固体電解質膜を得た。
溶媒であるアセトニトリル(Acetonitrile,AN)にポリエチレンオキシド(Polyethyleneoxide;PEO、Mw=4,000,000g/mol)を溶かして4wt%の高分子溶液を準備した。この際、リチウム塩としてLiTFSIを[EO]/[Li+]=18/1(モル比)になるように共に投入した。前記高分子溶液でPEOとリチウム塩が充分溶けるように70℃で一晩中撹拌した。次に、開始剤及び硬化剤を含む添加剤溶液を準備した。硬化剤としてはポリエチレングリコールジアクリレート(Polyethylene glycol diacrylate;PEGDA、Mw=575)、開始剤としては過酸化ベンゾイル(Benzoyl peroxide,BPO)を用い、PEGDAは、PEOに対して20wt%、BPOは、PEGDAに対して1%の量になるようにし、溶媒としてはアセトニトリルを用いた。前記添加剤溶液は、投入された成分がよく混合されるように約1時間撹拌した。その後、前記添加剤溶液を前記高分子溶液に添加し、二つの溶液を充分混合した。混合した溶液を離型フィルムにドクターブレードを用いて塗布及びコーティングした。コーティングギャップ(gap)は800μm、コーティング速度は20mm/分にした。前記溶液がコーティングされた離型フィルムをガラス板に移動させて水平を維持し、常温条件で一晩中乾燥して、さらに100℃で12時間真空乾燥した。このような方式で固体電解質膜を得た。得られた固体電解質膜の厚さは、約50μmであった。
実施例1-1~1-3
実施例1によって三枚の固体電解質膜サンプルを準備した。これらを各々常温条件、100℃で6時間露出及び100℃で12時間露出の条件で維持して回収してイオン伝導度を測定した。下記の表1は、前記イオン伝導度の測定結果を示したものである。
実施例2及び実施例3によって、各々二つの固体電解質膜サンプルを準備した。これを各々常温条件及び100℃で12時間の露出条件で維持して回収し、イオン伝導度を測定した。下記の表2は、前記イオン伝導度の測定結果を示す。
比較例1によって二つの固体電解質膜サンプルを準備した。これを各々常温条件及び100℃で12時間の露出条件で維持して回収し、イオン伝導度を測定した。下記の表3は、前記イオン伝導度の測定結果を示す。
スラリーを製造するために、電極活物質としてNCM811(LiNi0.8Co0.1Mn0.1O2)と、導電材として気相成長炭素繊維(vapor-grown carbon fiber、VGCF)と、高分子系固体電解質(PEOとLiTFSIの混合物、[EO]:[Li+]=18:1モル比)とを80:3:17の重量比で混合し、アセトニトリルに添加して撹拌して電極スラリーを製造した。これを20μm厚さのアルミニウム集電体にドクターブレードを用いて塗布し、その結果物を120℃で4時間真空乾燥した。その後、前記真空乾燥の結果物をロールプレスを用いて圧延工程を行い、2mAh/cm2の電極ローディング、48μm厚さの電極層、22%気孔度の電極を得た。
放電時:CCモードで3Vまで0.05Cで放電
Claims (12)
- 全固体電池用の固体電解質膜であって、
前記固体電解質膜は、20~30℃の範囲で1×10-7S/cm以上のイオン伝導度を有し、高分子材料(A)と固体電解質材料(B)との混合物を含み、
前記高分子材料(A)が、ブロック共重合体を含み、20~30℃で5×10-7S/cm以下のイオン伝導度を有する、固体電解質膜。 - 前記高分子材料(A)が、オレフィン系重合単位、スチレン系重合単位、アクリル系重合単位、カーバイド系重合単位、エステル系重合単位、またはこれらより選択された二つ以上の重合単位を含む、請求項1に記載の固体電解質膜。
- 前記高分子材料(A)が、エチレンオキシド、ポリエーテル系高分子の重合単位、ポリカーボネート系高分子の重合単位、ポリアクリレート系高分子の重合単位、ポリシロキサン系高分子の重合単位、ホスファゼン系高分子の重合単位、ポリプロピレンオキシド系高分子の重合単位、ポリリン酸エステル系高分子の重合単位、ポリビニルアルコールの重合単位、ポリフッ化ビニリデン系高分子の重合単位または重合単位を含む、請求項1または2に記載の固体電解質膜。
- 前記高分子材料(A)は、下記の化学式1で表される化合物のうち一つ以上を含むものであって、下記の化学式1において、m及びnは各々独立的に1以上の整数であり、下記のPBは、エチレンオキシド、ポリエーテル系高分子の重合単位、ポリカーボネート系高分子の重合単位、ポリアクリレート系高分子の重合単位、ポリシロキサン系高分子の重合単位、ホスファゼン系高分子の重合単位、ポリプロピレンオキシド系高分子の重合単位、ポリリン酸エステル系高分子の重合単位、ポリビニルアルコールの重合単位、ポリフッ化ビニリデン系高分子の重合単位またはこれらより選択された二つ以上を含み、下記のPAは、オレフィン系重合単位、スチレン系重合単位、アクリル系重合単位、カーバイド系重合単位、エステル系重合単位、またはこれらより選択された二つ以上を含む、請求項1から3のいずれか一項に記載の固体電解質膜:
[化学式1]
-[PA]n-[PB]m- 。 - 前記固体電解質材料(B)が、高分子系固体電解質材料、酸化物系固体電解質材料、硫化物系固体電解質材料、またはこれらのうち二つ以上を含む、請求項1から4のいずれか一項に記載の固体電解質膜。
- 前記高分子系固体電解質材料は、リチウム塩(C1)と高分子樹脂(C2)とが混合された高分子電解質(C)であり、前記高分子電解質は、20~30℃で1×10-7S/cm以上のイオン伝導度を有する、請求項5に記載の固体電解質膜。
- 前記高分子樹脂(C2)は、ポリエーテル系高分子、ポリカーボネート系高分子、アクリレート系高分子、ポリシロキサン系高分子、ホスファゼン系高分子、ポリエチレン誘導体、ポリプロピレンオキシド及び/またはポリエチレンオキシドを含むアルキレンオキシド誘導体、ポリビニルアセテート系高分子、リン酸エステル系高分子、ポリアクリロニトリル系高分子、ポリアジテーションリシン、ポリエステルスルフィド、ポリビニルアルコール、ポリフッ化ビニリデン系高分子、またはこれらのうち二つ以上の混合物を含む、請求項6に記載の固体電解質膜。
- 前記固体電解質材料(B)が、固体電解質膜合計100wt%に対して20~80wt%以上である、請求項1から7のいずれか一項に記載の固体電解質膜。
- 前記PBが、前記高分子材料(A)100wt%に対して10~90wt%の範囲で含まれる、請求項4に記載の固体電解質膜。
- 前記高分子樹脂(C2)は、分子量(Mn)が1~10,000kg/molである、請求項6に記載の固体電解質膜。
- 前記高分子材料(A)は、分子量(Mn)が1~10,000kg/molである、請求項1から10のいずれか一項に記載の固体電解質膜。
- 前記固体電解質材料(B)は、固体電解質材料(B)100wt%に対して高分子系固体電解質材料を80wt%以上含む、請求項5に記載の固体電解質膜。
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CN113748552A (zh) | 2021-12-03 |
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WO2021049919A1 (ko) | 2021-03-18 |
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