JP6158869B2 - 蓄電装置 - Google Patents
蓄電装置 Download PDFInfo
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- JP6158869B2 JP6158869B2 JP2015154096A JP2015154096A JP6158869B2 JP 6158869 B2 JP6158869 B2 JP 6158869B2 JP 2015154096 A JP2015154096 A JP 2015154096A JP 2015154096 A JP2015154096 A JP 2015154096A JP 6158869 B2 JP6158869 B2 JP 6158869B2
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- Prior art keywords
- layer
- negative electrode
- positive electrode
- storage device
- solid electrolyte
- Prior art date
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- 239000000758 substrate Substances 0.000 claims description 40
- 239000007784 solid electrolyte Substances 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 17
- 239000007774 positive electrode material Substances 0.000 claims description 16
- 239000007773 negative electrode material Substances 0.000 claims description 14
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 5
- 239000010936 titanium Substances 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 4
- 239000010931 gold Substances 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims 1
- 230000005611 electricity Effects 0.000 description 13
- 229910001416 lithium ion Inorganic materials 0.000 description 12
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 11
- 150000002500 ions Chemical class 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 8
- 229910052744 lithium Inorganic materials 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000000969 carrier Substances 0.000 description 5
- 238000004544 sputter deposition Methods 0.000 description 5
- 229910001413 alkali metal ion Inorganic materials 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 229910001386 lithium phosphate Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- TWQULNDIKKJZPH-UHFFFAOYSA-K trilithium;phosphate Chemical compound [Li+].[Li+].[Li+].[O-]P([O-])([O-])=O TWQULNDIKKJZPH-UHFFFAOYSA-K 0.000 description 3
- 239000011149 active material Substances 0.000 description 2
- 229910001420 alkaline earth metal ion Inorganic materials 0.000 description 2
- 229910021417 amorphous silicon Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000002736 metal compounds Chemical class 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910018119 Li 3 PO 4 Inorganic materials 0.000 description 1
- 229910013063 LiBF 4 Inorganic materials 0.000 description 1
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 1
- 229910013290 LiNiO 2 Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229920002396 Polyurea Polymers 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011245 gel electrolyte Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011244 liquid electrolyte Substances 0.000 description 1
- -1 lithium hexafluorophosphate Chemical compound 0.000 description 1
- 229910021450 lithium metal oxide Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
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- H01G11/22—Electrodes
- H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
- H01G11/28—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives
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- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
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- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
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- C23C14/58—After-treatment
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Description
オンが正極と負極の間を移動することによって充放電を行う方式の蓄電デバイスである、
リチウムイオン二次電池、及び、電気化学キャパシタ等の蓄電デバイスの開発が盛んに進
められている(特許文献1、特許文献2、特許文献3参照)。
いる、全固体リチウムイオン二次電池の開発も進められている(特許文献4、特許文献5
、特許文献6、非特許文献1参照)。
作製しなければならない。そのような基板は、基板自体の厚みがあるため、基板上に作製
した蓄電デバイスの厚さも厚くなってしまう。そのため、開示される発明の一様態では、
蓄電デバイスの薄型化を課題の1つとする。
薄型化、軽量化することを課題の1つとする。
ら蓄電デバイスを分離し、分離した蓄電デバイスをフレキシブル基板に貼り合わせること
により、厚さの薄い蓄電デバイスを作製する。
層を有する正極、並びに、負極集電層、及び、前記負極集電層上に形成された負極活物質
層を有する負極とを有する蓄電デバイスにおいて、前記基板、正極活物質層、負極活物質
層上に、固体電解質層と、前記正極活物質層、負極活物質層、固体電解質層を覆って、封
止層とを有することを特徴とする。
に第1の絶縁層を形成し、前記第1の絶縁層上に、正極集電層及び負極集電層を形成し、
前記正極集電層上に正極活物質層、前記負極集電層上に負極活物質層を形成し、前記正極
集電層及び前記正極活物質層を正極とし、前記負極集電層及び前記負極活物質層を負極と
する。前記第1の絶縁層、前記正極、前記負極上に、固体電解質層を形成し、前記固体電
解質層を覆って、封止層を形成し、前記封止層上に、平坦化膜及び支持体を形成し、前記
第1の層と第2の層を分離することにより、前記第1の基板から、前記第2の層、前記正
極、前記負極、前記固体電解質層、前記封止層、前記平坦化膜、前記支持体を分離する。
前記分離された第2の層、正極、負極、固体電解質層、封止層、平坦化膜、支持体を、第
2のフレキシブル基板に貼り合わせ、前記支持体を前記平坦化膜上から除去することを特
徴とする蓄電デバイスの作製方法に関する。
また、このような厚さの薄い蓄電デバイスを組み込んだ電気装置を小型化することが可能
である。
し、本明細書に開示された発明は多くの異なる態様で実施することが可能であり、本明細
書に開示された発明の趣旨及びその範囲から逸脱することなくその形態及び詳細を様々に
変更し得ることは当業者であれば容易に理解される。従って、本実施の形態の記載内容に
限定して解釈されるものではない。なお、以下に示す図面において、同一部分又は同様な
機能を有する部分には同一の符号を付し、その繰り返しの説明は省略する。
本実施の形態を、図1(A)〜図1(E)、図2(A)〜図2(C)、図3を用いて説
明する。
る(図1(A)参照)。
ることができる。その他、金属等の導電性基板や、シリコン等の半導体性基板上に絶縁膜
を形成した基板を用いることもできる。
板101及び第1の層102、並びに、第2の層103より上に設けられている積層構造
を分離させることができる。
ン酸化膜などが挙げられる。具体的には、第1の層102としてタングステン膜を形成し
、第1の層102上に、スパッタリング法により酸化珪素膜等の第2の層103を形成す
ればよい。
ても、成膜後に処理を加えることにより密着性が低下する膜の組み合わせを用いてもよい
。例えば、第1の層102として非晶質珪素膜、及び、第2の層103として酸化珪素膜
を積層し、成膜後に加熱または基板101の裏面からレーザビームを照射すると、非晶質
珪素膜が結晶化され、第1の層102と第2の層103との密着性が低下する。
及び負極集電層106を形成する(図1(B)参照)。
Pt)、チタン(Ti)、アルミニウム(Al)、銅(Cu)、金(Au)などの金属膜
を、スパッタ法により形成する。
を形成する(図1(C)参照)。正極集電層104及び正極活物質層105を正極121
、負極集電層106及び負極活物質層107を負極122と呼ぶこととする。本実施の形
態では、正極活物質層105及び負極活物質層107として、それぞれ、炭素(C)をス
パッタ法により形成する。このような炭素(C)として、例えば黒鉛が挙げられる。
yO2(ただし、MはCo、Ni、Mn、V、Fe、またはTiを示し、xは0.2以上
2.5以下、yは0.8以上1.25以下の範囲である)で示されるリチウム含有複合酸
化物を用いてもよい。ただし、リチウムイオン二次電池の場合、正極活物質層105とし
て上記の化学式LixMyO2で示されるリチウム含有複合酸化物を用いる場合、Mは1
つの元素でなく、2つ以上の元素を含んでいていても良い。すなわち、リチウムイオン二
次電池の場合、正極活物質層105として、多元系のリチウム含有複合酸化物を用いても
よい。
物)を用いることが可能である。
いは、層状構造をとる金属化合物を用いる場合は、本実施の形態の蓄電装置は、二次電池
として機能する。
した炭素を、水蒸気賦活、または、アルカリ賦活し、炭素を活性炭にする。
膜115を形成し、リチウム膜115のリチウムイオンを負極活物質層107中にドープ
する。リチウムイオンを負極活物質層107中にドープすることにより、あらかじめキャ
リアとなるイオンとなるリチウムイオンを導入しておくことができ、より多くのキャリア
となるイオンを利用することができる。
属イオン、あるいはアルカリ土類金属イオンを用いることが可能である。前記他のアルカ
リ金属イオンは、ナトリウム(Na)イオンを用いることができ、前記アルカリ金属イオ
ンは、マグネシウム(Mg)イオン、または、カルシウム(Ca)イオンを用いることが
できる。
土類金属イオンを、負極活物質層107中に導入するには、リチウムイオンと同様に、そ
れぞれのキャリアとなるイオンに対応する膜を負極活物質層107上に形成し、形成した
膜中のイオンを負極活物質層107中にドープすればよい。
参照)。
素雰囲気中でスパッタリングすることで、厚さ1.0μm程度のリン酸リチウムオキシナ
イトライド(LiPON)を形成する。また、リン酸リチウム以外にも六フッ化リン酸リ
チウム(LiPF6)、ホウフッ化リチウム(LiBF4)などを用いてもよい。
マによって損傷されないようにする必要がある。
として、ポリマー電解質やゲル電解質を用いてもよい。
1(E)参照)。封止層109は、酸素を含まない材料で形成することが好ましい。また
封止層109は、内部に水分や酸素が混入することを防ぐ必要がある。封止層109とし
て、例えばポリ尿素樹脂膜を用いればよい。
(図2(A)参照)。本実施の形態では、平坦化膜111として、エポキシ樹脂等の有機
樹脂、あるいは、繊維体に有機樹脂を含浸させた構造体(「プリプレグ」ともいう)を用
いる。
とができる。また、この支持体112自体も柔軟性のあるフレキシブルな基板であったほ
うが、基板から蓄電デバイス等を分離するときに蓄電デバイス等を傷つけることがない。
1、支持体112を、基板101から分離させる(図2(A)参照)。なおこの分離工程
は、互いに密着性の弱い第1の層102と第2の層103の界面を分離することにより行
われる。
1、支持体112を、フレキシブル基板113に貼り合わせる。次いで、支持体112を
平坦化膜111から除去する(図2(C)参照)。以上の作製工程により、フレキシブル
基板113上に蓄電デバイスを作製する。
及び負極集電層106は、封止層109の外に延在している。正極集電層104及び負極
集電層106の延在した領域をそれぞれ、外部の端子と電気的に接続すればよい。なお図
3において、A−A’の断面図が図2(C)である。
を作製した後、該基板から蓄電デバイスを分離する。分離した蓄電デバイスを厚さの薄い
基板に貼り合わせることにより、厚さの薄い蓄電デバイスを作製することができる。
102 層
103 層
104 正極集電層
105 正極活物質層
106 負極集電層
107 負極活物質層
108 固体電解質層
109 封止層
111 平坦化膜
112 支持体
113 フレキシブル基板
114 絶縁層
115 リチウム膜
121 正極
122 負極
Claims (4)
- フレキシブル基板と、
前記フレキシブル基板上の酸化珪素を含む層と、
前記酸化珪素を含む層上の絶縁層と、
前記絶縁層上面に接して設けられた正極と、
前記絶縁層上面に接して設けられた負極と、
前記絶縁層上、前記正極上、及び前記負極上の固体電解質層と、
前記固体電解質層上の封止層と、
前記封止層上の平坦化膜と、を有し、
前記正極は、正極集電層と、正極活物質層と、を有し、
前記負極は、負極集電層と、負極活物質層と、を有し、
前記固体電解質層は、前記正極の上面及び側面に接する第1の領域と、前記負極の上面及び側面に接する第2の領域と、前記正極と前記負極との間において前記絶縁層の上面に接する第3の領域と、を有し、
前記封止層は、前記正極、前記負極、及び前記固体電解質層を取り囲むように設けられ、且つ前記固体電解質層の上面及び側面に接する第4の領域と、前記絶縁層の上面に接する第5の領域と、を有し、
前記平坦化膜は、前記第4の領域及び前記第5の領域にわたって設けられていることを特徴とする蓄電装置。 - 請求項1において、
前記正極集電層は、白金、チタン、アルミニウム、銅、又は金を有することを特徴とする蓄電装置。 - 請求項1又は2において、
前記負極集電層は、白金、チタン、アルミニウム、銅、又は金を有することを特徴とする蓄電装置。 - 請求項1乃至3のいずれか一において、
前記平坦化膜は、繊維体に有機樹脂を含浸させた構造を有することを特徴とする蓄電装置。
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US20100239907A1 (en) | 2010-09-23 |
JP2016035921A (ja) | 2016-03-17 |
JP2010245031A (ja) | 2010-10-28 |
US9401525B2 (en) | 2016-07-26 |
US20160329604A1 (en) | 2016-11-10 |
JP2014131058A (ja) | 2014-07-10 |
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