JPWO2014142066A1 - 電池用電極材料およびそれを用いた電池用基板、蓄電池、色素増感太陽電池、キャパシタ、Liイオン二次電池 - Google Patents
電池用電極材料およびそれを用いた電池用基板、蓄電池、色素増感太陽電池、キャパシタ、Liイオン二次電池 Download PDFInfo
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- JPWO2014142066A1 JPWO2014142066A1 JP2015505461A JP2015505461A JPWO2014142066A1 JP WO2014142066 A1 JPWO2014142066 A1 JP WO2014142066A1 JP 2015505461 A JP2015505461 A JP 2015505461A JP 2015505461 A JP2015505461 A JP 2015505461A JP WO2014142066 A1 JPWO2014142066 A1 JP WO2014142066A1
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- Prior art keywords
- battery
- electrode material
- tungsten oxide
- powder
- electrode layer
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Links
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- 238000003860 storage Methods 0.000 title claims description 48
- 239000003990 capacitor Substances 0.000 title claims description 29
- 229910001416 lithium ion Inorganic materials 0.000 title claims description 29
- 239000000758 substrate Substances 0.000 title claims description 29
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- 239000013078 crystal Substances 0.000 claims abstract description 70
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910001930 tungsten oxide Inorganic materials 0.000 claims abstract description 42
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- AMWRITDGCCNYAT-UHFFFAOYSA-L hydroxy(oxo)manganese;manganese Chemical compound [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
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Images
Classifications
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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
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/20—Light-sensitive devices
- H01G9/2027—Light-sensitive devices comprising an oxide semiconductor electrode
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G41/00—Compounds of tungsten
- C01G41/02—Oxides; Hydroxides
-
- 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
- H01G11/26—Electrodes characterised by their structure, e.g. multi-layered, porosity or surface features
-
- 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
- H01G11/46—Metal oxides
-
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
- 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
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Abstract
Description
(実施例1〜5)
液相反応を利用して六方晶結晶構造を有する酸化タングステン粉末を用意した。出発原料をパラタングステン酸アンモニウム((NH4)10・(H2W12O42)・4H2O)とし、塩酸の1規定溶液(1N)を加えてpHを6〜8の範囲に調製したものを100時間、常温で反応させてWO3化合物の合成を行った。反応により析出した生成物を洗浄、ろ過後に100℃で乾燥し水和物、アンモニウム化合物などを含有するWO3の前駆体粉末を得た。更に得られたWO3の前駆体粉末を300℃〜460℃×1時間加熱して水和物、アンモニア化合物を除去し、WO3粉末を作製した。なお、熱処理温度が370℃のものを実施例1、400℃のものを実施例2、430℃のものを実施例3、460℃のものを実施例4、300℃のものを実施例5に係るWO3粉末とした。
実施例1とほぼ同様な方法でWO3の前駆体粉末を得た。但し、熱処理を施さずに100℃の乾燥状態で得たWO3粉末を比較例1、および熱処理条件を500℃×1時間に設定したものを比較例2に係るWO3粉末とした。
タングステン酸ナトリウム粉末を純水中に溶解させ、タングステン酸ナトリウムの水溶液を調製した。上記水溶液と1規定(1N)濃度の塩酸溶液とを混合した。混合した溶液を48時間、5℃で反応させゲル状の化合物を得た。この化合物を遠心分離後に上澄み液を除去し、更に純水を加える操作を3回繰り返しNaなどの不純物元素を取り除いた。次に、洗浄後の化合物を純水中に再度溶解させ、オートクレーブ中で120℃、10気圧、20時間反応させた。反応後の溶液を遠心分離後、ろ過、100℃で乾燥しWO3の前駆体化合物を作製した。更に得られたWO3の前駆体粉末を200℃〜400℃×1時間加熱して水和物を除去し、WO3粉末を作製した。なお、熱処理温度が370℃のものを実施例6、400℃のものを実施例7、460℃のものを実施例8に係るWO3粉末とした。
実施例4とほぼ同様な方法でWO3の前駆体粉末を得た。但し、熱処理を施さずに100℃での乾燥状態で得たWO3粉末を比較例3とし、また熱処理条件を500℃×1時間により得られたWO3粉末を比較例4とした。
比較例5としてプラズマ炎(500℃以上の高温)を用いて調製したWO3粉末を比較例5として用意した。
次に酸素中熱処理を行った実施例について説明する。
次に窒素中熱処理を行った実施例について説明する。実施例1、実施例2、実施例6、実施例7に係るWO3粉末を用意した。次に表3に示した熱処理を施した。これらに対して、実施例9〜12と同様の方法により酸素欠陥量を調べた。その結果を表3に示した。
次に実施例1〜8および比較例5のWO3粉末を用いて図1に示した蓄電池を作製した。
次に、図2に示したキャパシタを作製した。実施例1〜16および比較例1〜5にかかるWO3粉末に導電助剤としてアセチレンブラック、結着材としてPolyVinylidene DiFluoride(ポリフッ化ビニリデン)を混合しペーストを作製した。このペーストを厚さ15μmのアルミ箔(負極側電極層23)上に印刷し、乾燥し、負極電極シート(負極層26)とした。
Claims (14)
- 酸化タングステン粉末から成る電池用電極材料において、酸化タングステン粉末は六方晶結晶構造を少なくとも一部または全部に有することを特徴とする電池用電極材料。
- 酸化タングステン粉末は体積率で50%以上が六方晶結晶構造を有することを特徴とする請求項1記載の電池用電極材料。
- BET比表面積が1m2/g以上であることを特徴とする請求項1ないし請求項2のいずれか1項に記載の電池用電極材料。
- 酸化タングステン粉末の表面に金属酸化物を設けたことを特徴とする請求項1ないし請求項3のいずれか1項に記載の電池用電極材料。
- 酸化タングステン粉末がLixWO3である組成を有し、0<xを満たすことを特徴とする請求項1ないし請求項4のいずれか1項に記載の電池用電極材料。
- 酸化タングステン粉末に対してラマン分光分析を行ったとき、690±10cm−1または/および780±10cm−1の範囲にピークが検出されることを特徴とする請求項1ないし請求項5のいずれか1項に記載の電池用電極材料。
- 酸化タングステン粉末の組成をWO3−δとしたとき、δ≦0.01であることを特徴とする請求項1ないし請求項6のいずれか1項に記載の電池用電極材料。
- 酸化タングステン粉末の組成をWO3−δとしたとき、0.02≦δ≦0.40であることを特徴とする請求項1ないし請求項6のいずれか1項に記載の電池用電極材料。
- 請求項1ないし請求項8のいずれか1項に記載の電池用電極材料から成る多孔質電極層を具備したことを特徴とする電池用基板。
- 前記多孔質電極層は厚さが1μm以上であり、空隙率が20〜80体積%であることを特徴とする請求項9記載の電池用基板。
- 請求項9ないし請求項10のいずれか1項に記載の電池用基板を用いたことを特徴とする蓄電池。
- 請求項9ないし請求項10のいずれか1項に記載の電池用基板を用いたことを特徴とする色素増感太陽電池。
- 請求項9ないし請求項10のいずれか1項に記載の電池用基板を用いたことを特徴とするキャパシタ。
- 請求項1ないし請求項8のいずれか1項に記載の電池用電極材料を用いたことを特徴とするリチウムイオン二次電池。
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