JP2008529231A - 亜鉛陽極を備えたアルカリ電池におけるガスの接触再結合用装置 - Google Patents
亜鉛陽極を備えたアルカリ電池におけるガスの接触再結合用装置 Download PDFInfo
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- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 26
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- 238000006243 chemical reaction Methods 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 9
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- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 9
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Abstract
【選択図】図1
Description
・過充電を制限することによる方法、ただし、電池の不十分な充電を覚悟の上で、
・大過剰の電解質を用いて水の追加頻度を制限することによる方法、ただし、その状況は、電解質に起因して生じる過剰の負荷および体積の故に、固定された電池一式にのみ適用可能、
と種々の方法がある。
陽電極側: 2OH・ → H2O + 1/2 O2 + 2e・ [1]
負電極側: M + 1/2 O2 → MO [2]
MO + 2e・ + H2O → M + 2OH・ [3]
Zn + 1/2 O2 → ZnO
ZnO + 2e− + H2O → Zn + 2OH−
・過剰かつ非制御の充電は過剰の酸素の生成に繋がり、反応[1]の反応速度が反応[2]および[3]の速度より優勢である、
・上述の現象の結果として、負電極に向かう酸素のより緩慢な拡散が更に悪化し、負電極が完全に充電された後、水素の放出が発生する、
H2O + e− → OH− + 1/2 H2
・金属亜鉛は熱力学的に不安定であり、水素の生成と共に浸食され易くなる。
Zn + 2H2O → Zn(OH)2 + H2 ↑
・例えば、陽電極に組み込まれ、下記の反応式に従う充電中に水素の酸化が可能な銀をベースとする触媒の使用、
H2 + 2OH− → 2H2O + 2e−
・陽電極に接続し、水素の酸化を確実に行う第三の電極の使用、
・水素と酸素の再結合の確保を担う金属コレクタまたはカーボン組織上に堆積されたカーボンおよび白金からなる触媒構造体の使用。
白金が堆積されたカーボンブラックを10重量%の割合で沸点200℃の鉱油と混合する。次いで、PTFEの60%水性懸濁液を固形分として40重量%の割合で添加する。触媒発泡体を構成するペーストが得られるまで全体を混合する。
10重量%の割合で白金が堆積されたカーボンブラックの水懸濁液を調製する。強力に撹拌された水−カーボンブラック混合物に、PTFEの水性懸濁液を30重量%の割合で添加する。
実施例2に記載の触媒構造体を調製し、ケースのナイロン・カバー内に予め丸形または波形に圧着した金属鋼板に、発泡体の触媒が存在しない端部をスポット溶接する。
実施例1に記載の操作法を適用して本発明の触媒構造体を調製する。ここで、45PPIグレードのニッケル発泡体を密度35mg/cm2の同じグレードの銅発泡体に置き換えるが、その上に電気分解により20mg/cm2のニッケル保護膜が沈積されている。
Claims (13)
- 亜鉛陽極を備えたアルカリ電池の充電中に生成するガスの接触再結合用装置であって、触媒の担持および熱放散構造体としての機能を果たす細胞状の架橋金属発泡体に接触して配置された触媒物質からなり、前記触媒物質は白金族金属と疎水性結合剤を含むカーボンブラックの混合物で構成され、その全体が熱処理に付されて、上記触媒物質の疎水性結合剤が焼成されていることを特徴とする上記接触再結合用装置。
- 前記金属発泡体が、ニッケルまたはニッケルをベースとする合金から構成され、十分なまたは完全な開放気孔率を示すことを特徴とする請求項1記載の接触再結合用装置。
- 前記金属発泡体が、銅または銅をベースとする合金から構成され、十分なまたは完全な開放気孔率を示すことを特徴とする請求項1記載の接触再結合用装置。
- 前記金属発泡体がその使用状態において確実に化学的に不活性であることを目的として、金属発泡体の格子が保護被膜で被覆されていることを特徴とする請求項1記載の接触再結合用装置。
- 前記触媒物質が、圧延または圧縮により発泡体に導入されていることを特徴とする請求項1記載の接触再結合用装置。
- 前記触媒物質が、噴霧により発泡体に導入されていることを特徴とする請求項1記載の接触再結合用装置。
- 前記触媒物質は、白金が堆積されたカーボンブラックの混合物で構成されることを特徴とする請求項1記載の接触再結合用装置。
- 用いられる前記金属発泡体は、細孔の平均直径が約0.2〜0.8mmを示すことを特徴とする請求項1記載の接触再結合用装置。
- 用いられる前記金属発泡体は、見掛け表面の密度が200〜1500mg/cm3を示すことを特徴とする請求項1記載の接触再結合用装置。
- 前記ガスの発熱再結合反応により生じる熱量の熱放散を促進するために、前記装置が電池の端子の1つに接続していることを特徴とする請求項1記載の接触再結合用装置。
- 前記ガスの発熱再結合反応により生じる熱量の熱放散を促進するために、前記装置が電池ケースのカバー部分を形成する金属カバーまたは金属部品に接続していることを特徴とする請求項1記載の接触再結合用装置。
- システムの充電中に生成するガスの接触再結合用装置をケース内に収容し、触媒の担体および熱放散構造体としての機能を果たす細胞状の架橋金属発泡体に接触して配置された触媒物質からなることを特徴とする亜鉛陽極を備えたアルカリ電池。
- 前記ガスの接触再結合用装置が、端子の1つまたは電池カバーの金属部品に接続していることを特徴とする請求項12記載の亜鉛陽極を備えたアルカリ電池。
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PCT/IB2005/000285 WO2006082463A1 (fr) | 2005-02-02 | 2005-02-02 | Dispositif de recombinaison catalytique des gaz pour accumulateurs alcalins à anode de zinc abrege |
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EP (1) | EP1846980B1 (ja) |
JP (1) | JP5202962B2 (ja) |
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HK (1) | HK1114467A1 (ja) |
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US20120141344A1 (en) * | 2010-12-07 | 2012-06-07 | Impulse Devices Inc. | Flow-Through Structure with Active Ingredients |
RU2468866C1 (ru) * | 2011-09-15 | 2012-12-10 | Владимир Андреевич Шепелин | Способ изготовления катализатора и импрегнированный пористый носитель катализатора для рекомбинации водорода и кислорода |
US11043338B2 (en) * | 2017-11-09 | 2021-06-22 | Korea Research Institute Of Chemical Technology | Manufacturing method of porous composite electrode and organic removal method of porous composite electrode |
US11611115B2 (en) | 2017-12-29 | 2023-03-21 | Form Energy, Inc. | Long life sealed alkaline secondary batteries |
CN112805851A (zh) | 2018-07-27 | 2021-05-14 | 福恩能源公司 | 用于电化学电池的负电极 |
EP4199910A1 (en) * | 2020-08-20 | 2023-06-28 | F. Hoffmann-La Roche AG | Lyophilisate retainer, method of manufacturing thereof and procedure of drying a substrate |
US11652251B2 (en) * | 2020-11-02 | 2023-05-16 | ZAF Energy Systems, Incorporated | Battery state indicator based on recombination device feedback |
US11228065B1 (en) | 2021-07-02 | 2022-01-18 | ZAF Energy Systems, Incorporated | Recombination systems for aqueous batteries |
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2005
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WO1998026112A1 (en) * | 1996-12-12 | 1998-06-18 | Eltech Systems Corporation | Reticulated metal article combining small pores with large apertures |
EP0979673A1 (fr) * | 1998-08-12 | 2000-02-16 | Institut Français du Pétrole | Catalyseurs supportés utilisables dans des réactions de transformation de composés organiques |
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Publication number | Publication date |
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ATE441222T1 (de) | 2009-09-15 |
CA2596681A1 (fr) | 2006-08-10 |
KR20070106509A (ko) | 2007-11-01 |
EP1846980B1 (fr) | 2009-08-26 |
KR101230571B1 (ko) | 2013-02-06 |
EP1846980A1 (fr) | 2007-10-24 |
JP5202962B2 (ja) | 2013-06-05 |
WO2006082463A1 (fr) | 2006-08-10 |
CN100481602C (zh) | 2009-04-22 |
ES2332372T3 (es) | 2010-02-03 |
DE602005016307D1 (de) | 2009-10-08 |
PT1846980E (pt) | 2010-01-04 |
CA2596681C (fr) | 2013-04-30 |
PL1846980T3 (pl) | 2010-02-26 |
US20080003489A1 (en) | 2008-01-03 |
DK1846980T3 (da) | 2009-12-21 |
CN101111966A (zh) | 2008-01-23 |
HK1114467A1 (en) | 2008-10-31 |
US8563150B2 (en) | 2013-10-22 |
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