JP6139780B2 - 負極活物質、非水電解質電池、電池パック及び車 - Google Patents
負極活物質、非水電解質電池、電池パック及び車 Download PDFInfo
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Description
を含む、非水電解質電池が提供される。
第1の実施形態によれば、Li2+aAdTi6−bBbO14−c(AはNa,K,Mg,Ca、Ba及びSrよりなる群から選ばれる少なくとも一種類の元素、BはTi以外の金属元素、a,b,c及びdは、原子比又はモル比を示し、0≦a≦5、0≦b≦6、0≦c≦0.6、0≦d≦3を満たす)で表される粒子と、粒子表面の少なくとも一部を被覆する炭素材料とを含む、負極活物質が提供される。
第2の実施形態に係る非水電解質電池は、正極と、第1の実施形態の負極活物質を含む負極と、非水電解質とを含む。この非水電解質電池は、正極と負極の間に配置されるセパレータと、外装部材とをさらに含むことができる。
正極は、正極活物質を含む。正極活物質の例には、リチウムマンガン複合酸化物、リチウムニッケル複合酸化物、リチウムニッケルコバルト複合酸化物、リチウムコバルトアルミニウム複合酸化物、リチウムニッケルアルミニウム複合酸化物、リチウムニッケルコバルトマンガン複合酸化物、スピネル型リチウムマンガンニッケル複合酸化物、リチウムマンガンコバルト複合酸化物、オリビン型のリチウムリン酸化物、フッ素化硫酸鉄などが挙げられる。これらによると、高い正極電圧を得ることができる。
非水電解質は、リチウムイオン伝導性またはナトリウムイオン伝導性を有する液状、ゲル状、固体の電解質である。液状の非水電解質の例には、有機電解液、イオン液体が含まれる。ゲル状の非水電解質の例には、液状の有機溶媒と高分子材料を複合化したゲル状の有機電解質が挙げられる。固体非水電解質の例には、高分子固体電解質、無機固体電解質が含まれる。
正極と負極の間にはセパレータを配置することができる。セパレータの形態には、不織布、多孔質膜が含まれる。また、セパレータの材料には、セルロース、ポリオレフィンが含まれる。使用する材料の種類は、1種類または2種類以上にすることができる。好ましいセパレータに、厚さ30μm以下で多孔度50%以上の、セルロース又はポリオレフィンを含む不織布又は多孔質膜が含まれる。
外装部材としては、肉厚0.2mm以下のラミネートフィルム製容器や、肉厚0.5mm以下の金属製容器などが挙げられる。容器の形状は非水電解質電池の形態に応じたものにする。非水電解質電池の形態としては、扁平型、角型、円筒型、コイン型、ボタン型、シート型、積層型、電気自動車等に積載される大型電池等が挙げられる。
第3の実施形態によれば、非水電解質電池を単位セルとする組電池と、該組電池を含む電池パックとを提供することができる。非水電解質電池には、第2の実施形態の非水電解質電池を用いることができる。
以下、実施例を図面を参照して詳細に説明するが、本発明は以下に掲載される実施例に限定されるものでない。
正極活物質に、炭素材料粒子(平均粒子径5nm)が表面に付着(付着量1重量%)した一次粒子の平均粒子径50nmのオリビン構造のLiMn0.85Fe0.1Mg0.05PO4を用い、これに、導電剤として正極全体に対して繊維径0.1μmの気相成長の炭素繊維を3重量%、黒鉛粉末を5重量%、結着剤として正極全体に対して5重量%のPVdFをそれぞれ配合してn−メチルピロリドン(NMP)溶媒に分散してスラリーを調製した後、厚さ15μmのアルミニウム合金箔(純度99%)に両面塗布し、乾燥し、プレス工程を経て、片面の正極材料層の厚さは43μm、電極密度2.2g/cm3の正極を作製した。正極材料層の比表面積は、5m2/gであった。
下記表1に示す正極活物質及び負極活物質を用い、前述した実施例1で説明したのと同様にして非水電解質二次電池を作製した。
以下に、本願出願の当初の特許請求の範囲に記載された発明を付記する。
[1] Li 2+a A d Ti 6−b B b O 14−c (AはNa,K,Mg,Ca、Ba及びSrよりなる群から選ばれる少なくとも一種類の元素、BはTi以外の金属元素、a,b,c及びdが0≦a≦5、0≦b≦6、0≦c≦0.6、0≦d≦3を満たす)で表される粒子と、
前記粒子の表面の少なくとも一部を被覆する炭素材料と
を含む、負極活物質。
[2] 前記炭素材料の含有量が0.05重量%以上5重量%以下の範囲である、[1]に記載の負極活物質。
[3] 正極と、
[1]または[2]のいずれかに記載の負極活物質を含む負極と、
非水電解質と
を含む、非水電解質電池。
[4] 前記正極は、Li x Fe 1−w Mn w SO 4 F(0≦x≦1.1,0≦w≦0.2)で表される第1の正極活物質と、Li x Fe 1−y―z Mn y M z PO 4 (MはMg、Al、Ti及びZrよりなる群から選択される少なくとも1種類の元素、0≦x≦1.1,0≦y≦1、0≦z≦0.2)で表される第2の正極活物質とを含む、[3]に記載の非水電解質電池。
[5] [3]または[4]に記載の非水電解質電池が電気的に5直列、6直列、あるいは18直列以上24直列以下の範囲に接続された組電池を含む、電池パック。
Claims (8)
- Li2+aAdTi6−bBbO14−c(AはNa及びKよりなる群から選ばれる少なくとも一種類の元素を含み、BはTa又はNb、a,b,c及びdが0≦a≦5、0<b<6、0≦c≦0.6、0<d≦3を満たす)で表される粒子と、
前記粒子の表面の少なくとも一部を被覆する炭素材料とを含む、負極活物質。 - 前記炭素材料の含有量が0.05重量%以上5重量%以下の範囲である、請求項1に記載の負極活物質。
- 正極と、
請求項1または請求項2のいずれか1項に記載の負極活物質を含む負極と、
非水電解質とを含む、非水電解質電池。 - 前記正極は、LixFe1−wMnwSO4F(0≦x≦1.1,0≦w≦0.2)で表される第1の正極活物質と、LixFe1−y―zMnyMzPO4(MはMg、Al、Ti及びZrよりなる群から選択される少なくとも1種類の元素、0≦x≦1.1,0≦y≦1、0≦z≦0.2)で表される第2の正極活物質とを含む、請求項3に記載の非水電解質電池。
- 請求項3または請求項4に記載の非水電解質電池が電気的に5直列、6直列、あるいは18直列以上24直列以下の範囲に接続された組電池を含む、電池パック。
- 保護回路をさらに含む、請求項5に記載の電池パック。
- 請求項5または6のいずれか1項に記載の電池パックを含む、車。
- 回生機能付きアイドリングストップ車である、請求項7に記載の車。
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2014/081823 WO2016088193A1 (ja) | 2014-12-02 | 2014-12-02 | 負極活物質、非水電解質電池及び電池パック |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2017086487A Division JP6353114B2 (ja) | 2017-04-25 | 2017-04-25 | 負極 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPWO2016088193A1 JPWO2016088193A1 (ja) | 2017-04-27 |
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| EP (1) | EP3229296B1 (ja) |
| JP (1) | JP6139780B2 (ja) |
| KR (1) | KR101950121B1 (ja) |
| CN (1) | CN106575754A (ja) |
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| JP6139780B2 (ja) | 2014-12-02 | 2017-05-31 | 株式会社東芝 | 負極活物質、非水電解質電池、電池パック及び車 |
| EP3364484A1 (en) * | 2015-01-30 | 2018-08-22 | Kabushiki Kaisha Toshiba | Battery module and battery pack |
| US10505186B2 (en) | 2015-01-30 | 2019-12-10 | Kabushiki Kaisha Toshiba | Active material, nonaqueous electrolyte battery, battery pack and battery module |
| JP6067902B2 (ja) | 2015-03-13 | 2017-01-25 | 株式会社東芝 | 活物質、非水電解質電池、電池パック、組電池、及び自動車 |
| CN109417193B (zh) * | 2016-07-29 | 2021-10-15 | 株式会社东芝 | 非水电解质电池及电池包 |
| EP3493302B1 (en) * | 2016-07-29 | 2021-05-26 | Kabushiki Kaisha Toshiba | Nonaqueous electrolyte battery and battery pack |
| JP6486518B2 (ja) * | 2017-03-16 | 2019-03-20 | 太平洋セメント株式会社 | リチウムイオン二次電池用負極活物質の製造方法 |
| JP6702564B2 (ja) * | 2017-03-21 | 2020-06-03 | 株式会社東芝 | 活物質、電極、二次電池、組電池、電池パック、及び車両 |
| JP6751042B2 (ja) | 2017-03-24 | 2020-09-02 | 株式会社東芝 | 活物質、電極、二次電池、電池パック、及び車両 |
| JP6523501B2 (ja) * | 2017-04-18 | 2019-06-05 | 太平洋セメント株式会社 | リチウムイオン二次電池用負極活物質の製造方法 |
| JP7210198B2 (ja) * | 2018-09-18 | 2023-01-23 | 株式会社東芝 | 電極、二次電池、電池パック、及び車両 |
| US11121408B2 (en) | 2019-03-14 | 2021-09-14 | Medtronic, Inc. | Lithium-ion battery |
| CN114204016B (zh) * | 2020-09-18 | 2023-01-06 | 比亚迪股份有限公司 | 正极材料、正极浆料、正极片及电池 |
| CN114204015B (zh) | 2020-09-18 | 2023-01-06 | 比亚迪股份有限公司 | 正极材料、正极浆料、正极片及电池 |
| WO2023184367A1 (zh) * | 2022-03-31 | 2023-10-05 | 宁德时代新能源科技股份有限公司 | 一种正极极片、二次电池、电池模块、电池包和用电装置 |
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| EP3229296B1 (en) | 2019-11-06 |
| CN106575754A (zh) | 2017-04-19 |
| WO2016088193A1 (ja) | 2016-06-09 |
| JPWO2016088193A1 (ja) | 2017-04-27 |
| KR101950121B1 (ko) | 2019-02-19 |
| EP3229296A1 (en) | 2017-10-11 |
| US20170162872A1 (en) | 2017-06-08 |
| US10553868B2 (en) | 2020-02-04 |
| KR20170032904A (ko) | 2017-03-23 |
| EP3229296A4 (en) | 2018-07-18 |
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