JP7070052B2 - 全固体電池 - Google Patents
全固体電池 Download PDFInfo
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- JP7070052B2 JP7070052B2 JP2018087457A JP2018087457A JP7070052B2 JP 7070052 B2 JP7070052 B2 JP 7070052B2 JP 2018087457 A JP2018087457 A JP 2018087457A JP 2018087457 A JP2018087457 A JP 2018087457A JP 7070052 B2 JP7070052 B2 JP 7070052B2
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Description
〈態様1〉
正極集電体層、正極活物質層、固体電解質層、負極活物質層、及び負極集電体層を、この順で積層してなる単位全固体電池を1以上有する全固体電池積層体;並びに
前記全固体電池積層体の側面を被覆している樹脂層
を有し、
前記正極集電体層及び前記負極集電体層のうちの少なくとも一層の少なくとも一方の面が、積層部及び延出部を有し、
前記積層部が、隣接する他の層との重なる部分であり、前記延出部が、前記隣接する他の層よりも延び出た部分であり、かつ
前記延出部の表面粗さが、前記積層部の表面粗さよりも大きい、
全固体電池。
〈態様2〉
全ての前記正極集電体層及び全ての前記負極集電体層の少なくとも一方の面が、前記積層部及び前記延出部を有する、態様1に記載の全固体電池。
〈態様3〉
前記正極集電体層及び前記負極集電体層のうちの少なくとも一層の両方の面が、前記積層部及び前記延出部を有する、態様1又は2に記載の全固体電池。
〈態様4〉
前記正極活物質層と前記負極活物質層とは、面積が異なる、態様1~3のいずれか一項に記載の全固体電池。
〈態様5〉
前記負極活物質層の面積が、前記正極活物質層の面積よりも大きい、態様1~4のいずれか一項に記載の全固体電池。
〈態様6〉
前記樹脂層の材料が、硬化性樹脂又は熱可塑性樹脂である、態様1~5のいずれか一項に記載の全固体電池。
〈態様7〉
前記全固体電池積層体が、積層方向に拘束されている、態様1~6のいずれか一項に記載の全固体電池。
〈態様8〉
前記全固体電池が、全固体リチウムイオン二次電池である、態様1~7のいずれか一項に記載の全固体電池。
本開示の全固体電池は、
正極集電体層、正極活物質層、固体電解質層、負極活物質層、及び負極集電体層を、この順で積層してなる単位全固体電池を1以上有する全固体電池積層体;並びに
全固体電池積層体の側面を被覆している樹脂層
を有し、
正極集電体層及び負極集電体層のうちの少なくとも一層の少なくとも一方の面が、積層部及び延出部を有し、
積層部が、隣接する他の層との重なる部分であり、延出部が、当該隣接する他の層よりも延び出た部分であり、かつ
延出部の表面粗さが、積層部の表面粗さよりも大きい。
以下では、本開示の全固体電池にかかる積層部及び延出部について、より詳細に説明する。
本開示において、全固体電池積層体は、1以上の単位全固体電池を有することができる。また、単位全固体電池は、正極集電体層、正極活物質層、固体電解質層、負極活物質層、及び負極集電体層を、この順で積層してなる。
正極集電体層に用いられる導電性材料は、特に限定されず、全固体電池に使用できるものを適宜採用されうる。例えば、正極集電体層に用いられる導電性材料は、SUS、アルミニウム、銅、ニッケル、鉄、チタン、又はカーボン等であってよいが、これらに限定されない。
正極活物質層は、少なくとも正極活物質を含み、好ましくは後述する固体電解質をさらに含む。そのほか、使用用途や使用目的等に合わせて、例えば、導電助剤又はバインダー等の全固体電池の正極活物質層に用いられる添加剤を含むことができる。
固体電解質層は、少なくとも固体電解質を含む。固体電解質として、特に限定されず、全固体電池の固体電解質として利用可能な材料を用いることができる。例えば、固体電解質は、硫化物固体電解質、酸化物固体電解質、又はポリマー電解質等であってよいが、これらに限定されない。
ポリマー電解質としては、ポリエチレンオキシド(PEO)、ポリプロピレンオキシド(PPO)、及びこれらの共重合体等が挙げられるが、これらに限定されない。
負極活物質層は、少なくとも負極活物質を含み、好ましくは上述した固体電解質をさらに含む。そのほか、使用用途や使用目的等に合わせて、例えば、導電助剤又はバインダー等の全固体電池の負極活物質層に用いられる添加剤を含むことができる。
負極集電体層に用いられる導電性材料は、特に限定されず、全固体電池に使用できるものを適宜採用されうる。例えば、負極集電体層に用いられる導電性材料は、SUS、アルミニウム、銅、ニッケル、鉄、チタン、又はカーボン等であってよいが、これらに限定されない。
本開示において、樹脂層の材料は、特に限定されず、一般的な全固体電池に用いられる絶縁性の樹脂材料と同様であってもよい。
本開示において、全固体電池の種類としては、全固体リチウムイオン電池、全固体ナトリウムイオン電池、全固体マグネシウムイオン電池及び全固体カルシウムイオン電池等を挙げることができる。中でも、全固体リチウムイオン電池及び全固体ナトリウムイオン電池が好ましく、特に、全固体リチウムイオン電池が好ましい。
2、2a、2b、2c、2d 正極活物質層
3、3a、3b、3c、3d 固体電解質層
4、4a、4b、4c、4d 負極活物質層
5、5a、5b、5c、5d 負極集電体層
6a、6b、6c、6d 単位全固体電池
7、9 正極活物質層
8 正極集電体層
10、20 全固体電池積層体
11、21 樹脂層
100、200 全固体電池
Claims (8)
- 正極集電体層、正極活物質層、固体電解質層、負極活物質層、及び負極集電体層を、この順で積層してなる単位全固体電池を1以上有する全固体電池積層体;並びに
前記全固体電池積層体の側面を被覆している樹脂層
を有し、
前記正極集電体層及び前記負極集電体層のうちの少なくとも一層の少なくとも一方の面が、積層部及び延出部を有し、
前記積層部が、隣接する他の層との重なる部分であり、前記延出部が、前記隣接する他の層よりも延び出た部分であり、
前記延出部の表面粗さが、前記積層部の表面粗さよりも大きく、かつ
前記延出部の表面粗さが、エンボス加工によって得られたものである、
全固体電池。 - 全ての前記正極集電体層及び全ての前記負極集電体層の少なくとも一方の面が、前記積層部及び前記延出部を有する、請求項1に記載の全固体電池。
- 前記正極集電体層及び前記負極集電体層のうちの少なくとも一層の両方の面が、前記積層部及び前記延出部を有する、請求項1又は2に記載の全固体電池。
- 前記正極活物質層と前記負極活物質層とは、面積が異なる、請求項1~3のいずれか一項に記載の全固体電池。
- 前記負極活物質層の面積が、前記正極活物質層の面積よりも大きい、請求項1~4のいずれか一項に記載の全固体電池。
- 前記樹脂層の材料が、硬化性樹脂又は熱可塑性樹脂である、請求項1~5のいずれか一項に記載の全固体電池。
- 前記全固体電池積層体が、積層方向に拘束されている、請求項1~6のいずれか一項に記載の全固体電池。
- 前記全固体電池が、全固体リチウムイオン二次電池である、請求項1~7のいずれか一項に記載の全固体電池。
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| JP2018087457A JP7070052B2 (ja) | 2018-04-27 | 2018-04-27 | 全固体電池 |
| CN201910308282.4A CN110416629B (zh) | 2018-04-27 | 2019-04-17 | 全固体电池 |
| US16/396,033 US20190334205A1 (en) | 2018-04-27 | 2019-04-26 | All-solid-state battery |
| US18/411,668 US20240194939A1 (en) | 2018-04-27 | 2024-01-12 | All-solid-state battery |
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| US20190334205A1 (en) | 2019-10-31 |
| CN110416629B (zh) | 2022-11-08 |
| US20240194939A1 (en) | 2024-06-13 |
| JP2019192610A (ja) | 2019-10-31 |
| CN110416629A (zh) | 2019-11-05 |
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