JP4967217B2 - 二次電池用正極活物質、それを用いた二次電池用正極および二次電池 - Google Patents
二次電池用正極活物質、それを用いた二次電池用正極および二次電池 Download PDFInfo
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- JP4967217B2 JP4967217B2 JP2003409554A JP2003409554A JP4967217B2 JP 4967217 B2 JP4967217 B2 JP 4967217B2 JP 2003409554 A JP2003409554 A JP 2003409554A JP 2003409554 A JP2003409554 A JP 2003409554A JP 4967217 B2 JP4967217 B2 JP 4967217B2
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Images
Classifications
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- 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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- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Description
続いて、フィルム状外装体を用いた非水電解質二次電池に関して述べる。
リチウムマンガン複合酸化物を含む基体粒子と、該基体粒子の表面に、焼成により付着したランタノイド元素含有化合物(LiLnO2(式中、Lnはイットリウム、スカンジウム及び3価の希土類金属からなる群より選択される少なくとも1種を示す。)を除く)と、を備え、
前記ランタノイド元素含有化合物は、ランタノイド酸化物と、ランタノイド元素およびMnの複合酸化物からなるランタノイドマンガン複合酸化物とを含み、かつ、
前記ランタノイド元素含有化合物が、前記リチウムマンガン複合酸化物に前記ランタノイド元素が固溶してなる中間層を介して、前記基体粒子の表面に略均一に分布する構造を有する、非水電解質二次電池用正極活物質が提供される。
<二次電池用正極活物質>
以下、本発明により提供される二次電池用正極活物質の実施の形態について説明する。
<二次電池用正極>
以下、本発明により提供される二次電池用正極の実施の形態について説明する。
<二次電池の構造>
以下、本発明により提供される二次電池の実施の形態について説明する。
ここで、この外装体はシール材を介して封止されたフィルム状外装体であってもよい。
<二次電池用正極活物質の製造方法>
以下、本発明により提供される二次電池用正極活物質の製造方法の実施の形態について説明する。
この表面処理スピネルは、以下の特徴を有する。
<二次電池用正極の製造方法>
以下、本発明により提供される二次電池用正極の製造方法の実施の形態について説明する。
<二次電池の製造方法>
以下、本発明により提供される二次電池用の製造方法の実施の形態について説明する。
次に、本実施の形態で用いられる負極について説明する。
<他の実施の形態>
<表面処理スピネルの合成>
続いて、得られたLi1+xMn2-xO4を表面処理スピネルとするための処理を行った。
<評価試験例1>
<評価試験例2>
<保存後の容量回復率と内部直流抵抗>
<評価試験例3>
<評価試験例4>
<評価試験例5>
2 発電要素
3 電極リード
11 熱融着性樹脂膜
12 金属箔
13 耐熱性樹脂膜
31 正極リード
32 負極リード
Claims (9)
- リチウムマンガン複合酸化物を含む基体粒子と、該基体粒子の表面に、焼成により付着したランタノイド元素含有化合物(LiLnO2(式中、Lnはイットリウム、スカンジウム及び3価の希土類金属からなる群より選択される少なくとも1種を示す。)を除く)と、を備え、
前記ランタノイド元素含有化合物は、ランタノイド酸化物と、ランタノイド元素およびMnの複合酸化物からなるランタノイドマンガン複合酸化物とを含み、かつ、
前記ランタノイド元素含有化合物が、前記リチウムマンガン複合酸化物に前記ランタノイド元素が固溶してなる中間層を介して、前記基体粒子の表面に略均一に分布する構造を有する、非水電解質二次電池用正極活物質。 - 請求項1に記載の非水電解質二次電池用正極活物質において、前記ランタノイド元素は、La、NdおよびSmからなる群より選ばれる1種以上の元素であることを特徴とする非水電解質二次電池用正極活物質。
- 請求項1または2に記載の非水電解質二次電池用正極活物質を含むことを特徴とする非水電解質二次電池用正極。
- 請求項3に記載の非水電解質二次電池用正極において、水素イオン捕捉剤をさらに含むことを特徴とする非水電解質二次電池用正極。
- 請求項4に記載の非水電解質二次電池用正極において、前記水素イオン捕捉剤は、リチウムニッケル複合酸化物であることを特徴とする非水電解質二次電池用正極。
- 請求項5に記載の非水電解質二次電池用正極において、前記非水電解質二次電池用正極中における前記リチウムマンガン複合酸化物の含有量を(100−a)質量部とし、前記非水電解質二次電池用正極中における前記リチウムニッケル複合酸化物の含有量をa質量部としたとき、
3<a≦45
を満たすことを特徴とする非水電解質二次電池用正極。 - 発電要素および該発電要素を収納する外装体を備え、該発電要素は、請求項3乃至6いずれか1項に記載の非水電解質二次電池用正極と、電解質と、セパレータと、該電解質および該セパレータを介して該非水電解質二次電池用正極と対向配置された負極とを備える発電要素であることを特徴とする非水電解質二次電池。
- 請求項7に記載の非水電解質二次電池において、前記外装体はシール材を介して封止されたフィルム状外装体であることを特徴とする非水電解質二次電池。
- 請求項7または8に記載の非水電解質二次電池において、前記電解質は、LiPF6またはLiBF4を含む支持塩と、有機溶媒とを含有する非水電解質であることを特徴とする非水電解質二次電池。
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