JP6176899B2 - 蓄電装置の作製方法及び負極の作製方法 - Google Patents
蓄電装置の作製方法及び負極の作製方法 Download PDFInfo
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- JP6176899B2 JP6176899B2 JP2012182131A JP2012182131A JP6176899B2 JP 6176899 B2 JP6176899 B2 JP 6176899B2 JP 2012182131 A JP2012182131 A JP 2012182131A JP 2012182131 A JP2012182131 A JP 2012182131A JP 6176899 B2 JP6176899 B2 JP 6176899B2
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- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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- H01G11/04—Hybrid capacitors
- H01G11/06—Hybrid capacitors with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/50—Electrodes characterised by their material specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
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- H01M2220/00—Batteries for particular applications
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- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Description
本実施の形態では、本発明の一態様である蓄電装置の電極及びその作製方法について説明する。
本実施の形態では、本発明の一態様に係る蓄電装置について説明する。
本発明の一態様に係る蓄電装置は、電力により駆動する様々な電気機器の電源として用いることができる。
本実施例では、本発明の一態様である株及びウィスカーを有する活物質層の作製例を示す。
図5(A)及び(B)に、上記成膜条件によって活物質層を形成したときに生じた株の断面を観察した透過型電子顕微鏡(TEM(Transmission Electron Microscope))写真を示す。このときの成膜時間は10分である。図5(A)は一つの株から発生したウィスカーの集合全体を観察した電子顕微鏡写真であり、図5(B)はその株の部分について拡大観察した写真である。なお、図5(A)及び(B)に示す電子顕微鏡写真は、観察のため観察試料の加工時に白金、カーボン及びタングステンのコートを行っている。
次に、図7(A)〜(C)を用いて、活物質層の成膜時間経過ごとのウィスカーの成長の様子を示す。活物質層の成膜条件は、成膜時間を除いては上記した電子顕微鏡観察した試料と同一である。いずれも活物質層が形成された試料表面を水平面に対して30°傾けて観察した、同倍率による走査型電子顕微鏡(SEM(Scanning Electron Microscope))写真である。
次に、図8を用いて、ウィスカー同士が結合し架橋構造を形成することを示す。図8(A)〜(C)は、上記と同一の成膜条件、すなわちシランの流量を300sccm、窒素の流量を300sccmとし、反応室内の圧力を150Paとし、反応室内の温度を550℃としたLPCVD法により成膜したシリコン活物質層のSEM写真である。成膜時間は60分とした。
101 活物質層
102 薄膜部
103a 株
103b ウィスカー
104a 株
104b ウィスカー
105 結合部
106 結合部
107a 芯
107b 外殻
300 蓄電装置
302 外装部材
304 蓄電セル
306 端子部
308 端子部
310 負極
312 正極
315 負極集電体
314 セパレータ
316 電解液
317 負極活物質層
318 正極集電体
320 正極活物質層
500 チタンシート
501 薄膜部
502 株
503 ウィスカー
600 断面
701a ウィスカー
702a 株
701b ウィスカー
702b 株
703b 株
701c ウィスカー
801 ウィスカー
802 点線枠部
803 ウィスカー
804 ウィスカー
Claims (6)
- 集電体と、
前記集電体上の活物質層としての機能を有するシリコン層と、を有し、
前記シリコン層は、
前記集電体と接する薄膜状の部分と、
複数の株と、
前記複数の株のそれぞれから伸長した複数のウィスカー状の突起と、を有する蓄電装置の作製方法であって、
前記集電体上に、触媒は形成されず、
前記シリコン層は、CVD法により前記集電体上に形成され、
前記複数の株の一から伸長した突起と、前記複数の株の他の一から伸長した突起とが、部分的に結合し、
前記薄膜状の部分は、非晶質シリコンであることを特徴とする蓄電装置の作製方法。 - 請求項1において、
前記突起は、芯が結晶質シリコンでなり、前記芯の周囲を非晶質シリコンが覆っていることを特徴とする蓄電装置の作製方法。 - 請求項1又は2において、
前記ウィスカー状の突起は、円柱状若しくは角柱状の柱状、又は円錐状若しくは角錐状の針状であることを特徴とする蓄電装置の作製方法。 - 集電体と、
前記集電体上の活物質層としての機能を有するシリコン層と、を有し、
前記シリコン層は、
前記集電体と接する薄膜状の部分と、
複数の株と、
前記複数の株のそれぞれから伸長した複数のウィスカー状の突起と、を有する負極の作製方法であって、
前記集電体上に、触媒は形成されず、
前記シリコン層は、CVD法により前記集電体上に形成され、
前記複数の株の一から伸長した突起と、前記複数の株の他の一から伸長した突起とが、部分的に結合し、
前記薄膜状の部分は、非晶質シリコンであることを特徴とする負極の作製方法。 - 請求項4において、
前記突起は、芯が結晶質シリコンでなり、前記芯の周囲を非晶質シリコンが覆っていることを特徴とする負極の作製方法。 - 請求項4又は5において、
前記ウィスカー状の突起は、円柱状若しくは角柱状の柱状、又は円錐状若しくは角錐状の針状であることを特徴とする負極の作製方法。
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