JP2004134384A - 金属酸化物のコーティングが施された酸化バナジウム銀 - Google Patents
金属酸化物のコーティングが施された酸化バナジウム銀 Download PDFInfo
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Abstract
【課題】非水性電解液リチウム電気化学電池に使用できる、改良されたカソード物質を提供する。
【解決手段】好ましい活物質は、第一カソード活物質からなるコアに第二カソード活物質によりコーティングが施された複合活物質である。好ましくはγ-相SVO(Ag1.2V3O1.8)の保護層でコーティングされたε-相酸化バナジウム銀(Ag2V4O11)である。SVOコアは高い容量と出力率を供給し、保護コーティングは活性粒子の電解液との反応性を減じてカソードの長期安定性を改良することが出来る。
【選択図】なし
Description
γ-相SVOカソード物質は従来技術に従って、16.58gのV2O5試料と10.05gのAg2CO3試料を混合することによって調製した。この混合物を約16時間、空気雰囲気中で約450℃に加熱した。試料をその後冷やし、混合し、約16時間空気雰囲気中で再加熱した。試料を再度冷やして混合し、その後空気雰囲気中で約21時間約520℃で再加熱した。この時点で、生成物を冷やし、X線粉末回折及びBET表面積測定によって分析した。X線粉末回折データによりγ-相SVOの構造が確認された。カソード物質のBET表面積は約0.42m2/gであった。
γ-相SVOでコーティングされたε-相SVOコアを含む新しい複合物質(実施例3)と比較するために、従来技術によって、ε-相SVOを調製した。具体的には、15.00gのV2O5試料と11.38gのAg2CO3試料を混合し、約16時間、空気雰囲気中で約450℃に加熱した。試料をその後冷やし、混合し、約16時間空気雰囲気中で約500℃、約22時間再加熱した。この時点で、生成物を冷やし、X線粉末回折及びBET表面積測定によって分析した。X線粉末回折データによりε-相SVOの構造が確認された。この物質のBET表面積は0.65m2/gであった。
Claims (25)
- a)アルカリ金属からなるアノードと、
b)第二カソード活物質によるコーティングが施された第一カソード活物質からなるコア、を含む複合カソード活物質(第一カソード活物質は第二カソード活物質ではない)からなるカソードと、
c)前記アノードと前記カソードを活性化する電解液、とを含む電気化学電池。 - 前記第一カソード活物質が、ε-相SVO、β-相SVO、γ-相SVO、CSVO、V2O5、MnO2、LiCoO2、LiNiO2、LiMnO2、LiMn2O4、CuO2、TiS2、Cu2S、FeS、FeS2、Ag2O、Ag2O2、CuF、Ag2CrO4、酸化バナジウム銅、およびそれらの混合物からなる群から選ばれる、請求項1記載の電気化学電池。
- 前記コーティングが、ε-相SVO、β-相SVO、γ-相SVO、CSVO、V2O5、MnO2、LiCoO2、LiNiO2、LiMnO2、LiMn2O4、CuO2、TiS2、Cu2S、FeS、FeS2、Ag2O、Ag2O2、CuF、Ag2CrO4、酸化バナジウム銅、およびそれらの混合物からなる群から選ばれる、請求項1記載の電気化学電池。
- 前記アノードがリチウムであり、前記複合カソード活物質が、その個々の粒子にγ-相SVOコーティングが施されたε-相SVOである、請求項1記載の電気化学電池。
- 前記複合カソード活物質が、ステンレススチール、チタン、タンタル、白金、アルミニウム、金、ニッケル、およびそれらの合金からなる群から選ばれるカソード集電体に接触している、請求項1記載の電気化学電池。
- 前記第一カソード活物質からなるコアが、約30μm〜約300μmの大きさの粒子である、請求項1記載の電気化学電池。
- 前記第二カソード活物質のコーティングの厚みが、約1μm〜約10μmである、請求項1記載の電気化学電池。
- ケース−負設計、ケース−陽設計、及びケース−ニュートラル設計のいずれかで構築された、請求項1記載の電気化学電池。
- 前記電解液が、テトラヒドロフラン、メチルアセテート、ジグリム、トリグリム、テトラグリム、ジメチルカーボネート、1,2−ジメトキシエタン、1,2−ジエトキシエタン、1−エトキシ,2−メトキシエタン、エチルメチルカーボネート、メチルプロピルカーボネート、エチルプロピルカーボネート、ジエチルカーボネート、ジプロピルカーボネート、及びそれらの混合物からなる群から選ばれる第一溶媒と、プロピレンカーボネート、エチレンカーボネート、ブチレンカーボネート、アセトニトリル、ジメチルスルホキシド、ジメチル、ホルムアミド、ジメチルアセトアミド、γ−バレロラクトン、γ−ブチロラクトン、N−メチル−2−ピロリドン、及びそれらの混合物からなる群から選ばれる第二溶媒とを有する、請求項1記載の電気化学電池。
- 前記電解液が、LiPF6、LiBF4、LiAsF6、LiSbF6、LiClO4、LiO2、LiAlCl4、LiGaCl4、LiC(SO2CF3)3、LiN(SO2CF3)2、LiSCN、LiO3SCF3、LiC6F5SO3、LiO2CCF3、LiSO6F、LiB(C6H5)4、LiCF3SO3、およびそれらの混合物からなる群から選ばれるリチウム塩を含む、請求項1記載の電気化学電池。
- a)装置ハウジングと、
b)前記装置ハウジングの内側に収納された制御回路と、
c)前記制御回路に電力を供給するために、前記装置ハウジングの内側に格納された電気化学電池であって、
i) リチウムを含むアノードと、
ii)第二カソード活物質のコーティングが施された第一カソード活物質のコアを有する複合カソード活物質(第一カソード活物質は第二カソード活物質ではない)からなるカソード、
とを含む電池と、
d)前記アノードと前記カソードを活性化する非水性電解液と、
e)前記装置が体部分の生理機能を監視するためのモニタリングモード中であるときにも、体部分に治療を行うためのアクティブモード中であるときにも、前記電気化学電池が前記制御回路に電力を供給する医療装置
によるアシストが予定される体部分に、前記装置ハウジングを接続するリード、
とを有する体内埋め込み可能な医療装置。 - 前記第一カソード活物質が、ε-相SVO、β-相SVO、γ-相SVO、CSVO、V2O5、MnO2、LiCoO2、LiNiO2、LiMnO2、LiMn2O4、CuO2、TiS2、Cu2S、FeS、FeS2、Ag2O、Ag2O2、CuF、Ag2CrO4、酸化バナジウム銅、およびそれらの混合物からなる群から選ばれる、請求項11記載の体内埋め込み可能な医療装置。
- 前記コーティングが、ε-相SVO、β-相SVO、γ-相SVO、CSVO、V2O5、MnO2、LiCoO2、LiNiO2、LiMnO2、LiMn2O4、CuO2、TiS2、Cu2S、FeS、FeS2、Ag2O、Ag2O2、CuF、Ag2CrO4、酸化バナジウム銅、およびそれらの混合物からなる群から選ばれる、請求項11記載の体内埋め込み可能な医療装置。
- 前記アノードがリチウムであり、前記複合カソード活物質が、その個々の粒子にγ-相SVOコーティングが施されたε-相SVOである、請求項11記載の体内埋め込み可能な医療装置。
- 前記カソード活物質が、ステンレススチール、チタン、タンタル、白金、アルミニウム、金、ニッケル、及びそれらの合金からなる群から選ばれるカソード集電体に接触している、請求項11記載の体内埋め込み可能な医療装置。
- 前記第一カソード活物質のコアが、約30μm〜約300μmの大きさの粒子であり、前記第二カソード活物質のコーティングの厚みが、約1μm〜約10μmである、請求項11記載の体内埋め込み可能な医療装置。
- a)ε-相SVO、β-相SVO、γ-相SVO、CSVO、V2O5、MnO2、LiCoO2、LiNiO2、LiMnO2、LiMn2O4、CuO2、TiS2、Cu2S、FeS、FeS2、Ag2O、Ag2O2、CuF、Ag2CrO4、酸化バナジウム銅、およびそれらの混合物からなる群から選ばれるコアカソード活物質を、粒状の形状で準備する工程と、
b)ε-相SVO、β-相SVO、γ-相SVO、CSVO、V2O5、MnO2、LiCoO2、LiNiO2、LiMnO2、LiMn2O4、CuO2、TiS2、Cu2S、FeS、FeS2、Ag2O、Ag2O2、CuF、Ag2CrO4、酸化バナジウム銅、およびそれらの混合物から選ばれるコーティング金属(前記コアカソード活物質とコーティングカソード活物質は異なる)を中に含む有機溶媒の溶液を準備する工程と、
c)前記第一コアカソード活物質を、前記第二コーティングカソード活物質を含有するゾル・ゲル溶液の中に混合することによって、前記コアカソード活物質をコーティングする第二カソード活物質のゲルを形成する工程と、
d)その結果生じたコーティングされたカソード活物質を乾燥し、溶媒材を実質的に取り除く工程と、
e)乾燥した、コーティングされたコアカソード活物質を加熱して、複合カソード活物質を準備する工程、
とを有する、複合カソード活物質を準備する方法。 - 前記第一カソード活物質を、ε-相SVO、β-相SVO、γ-相SVO、CSVO、V2O5、MnO2、LiCoO2、LiNiO2、LiMnO2、LiMn2O4、CuO2、TiS2、Cu2S、FeS、FeS2、Ag2O、Ag2O2、CuF、Ag2CrO4、酸化バナジウム銅、およびそれらの混合物からなる群から選ぶことを含む、請求項17記載の方法。
- 前記コーティングを、ε-相SVO、β-相SVO、γ-相SVO、CSVO、V2O5、MnO2、LiCoO2、LiNiO2、LiMnO2、LiMn2O4、CuO2、TiS2、Cu2S、FeS、FeS2、Ag2O、Ag2O2、CuF、Ag2CrO4、酸化バナジウム銅、およびそれらの混合物からなる群から選ぶことを含む、請求項17記載の方法。
- リチウムのアノードと、その個々の粒子にγ-相SVOコーティングが施されたε-相SVOの複合カソード活物質、とを準備することを含む、請求項17記載の方法。
- 前記ゾル・ゲル溶液を、水性あるいは非水性溶液のいずれかとして準備することを含む、請求項17記載の方法。
- 前記コーティング金属と前記活物質を、その重量比が約1:3から約1:20の範囲となるように混合することを含む、請求項17記載の方法。
- コーティングされた前記カソード活物質を、約20インチHgから約50インチHg範囲の減圧下で乾燥することを含む、請求項17記載の方法。
- コーティングされた前記カソード活物質を、約200℃から約500℃の範囲の温度で乾燥することを含む、請求項17記載の方法。
- コーティングされた前記カソード活物質を、約10分から約6時間乾燥することを含む、請求項17記載の方法。
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Also Published As
Publication number | Publication date |
---|---|
US20040029005A1 (en) | 2004-02-12 |
EP1388905A3 (en) | 2005-05-11 |
US7211349B2 (en) | 2007-05-01 |
EP1388905A2 (en) | 2004-02-11 |
CA2436380A1 (en) | 2004-02-06 |
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