JP2020194792A - 特性が変化するナノ複合電池電極粒子 - Google Patents
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Abstract
Description
本特許出願は、2015年10月13日出願の「特性が変化するナノ複合電池電極粒子(Nanocomposite Battery Electrode Particles with Changing Properties)」と題する米国特許出願第14/882,166号、および2014年10月14日出願の「半径に沿って特性が変化するナノ複合電池電極粒子(Nanocomposite Battery Electrode Particles with Properties Changing Along their Radii)」と題する米国仮特許出願第62/063,493号に基づく優先権を主張するものであり、これらの出願はそれぞれ、参照によって全体が本出願に明示的に組み込まれる。
本開示は概してエネルギー貯蔵装置、より詳細には、粉末ベースの電極などを活用した電池技術に関する。
電気化学エネルギー貯蔵技術は、広範囲に及ぶ重要な用途、いくつかの例を挙げると、エネルギー効率の良い産業用機器、電動型およびハイブリッド電動型の輸送手段(陸上用車両、航空機および船舶を含む)、送電網ならびに家庭用電化製品などの用途に役立つ。リチウムイオン(Liイオン)電池など先進的な金属イオン電池は、一部ではエネルギー密度が比較的高く軽量で長期間にわたり使用できる潜在性があることから、現在、家庭用電化製品および電動型輸送手段の用途で支配的である。しかしながら、様々な種類の電池のさらなる開発および改善が必要とされている。
Claims (18)
- 複合粒子を含む電池電極組成物であって、
各前記複合粒子が、
電池作動中にイオンを貯蔵および放出するように設けられ、(i)正極活物質として少なくとも220mAh/gの比容量、または(ii)負極活物質として少なくとも400mAh/gの比容量を示す、高容量活物質と、
前記活物質が配置される細孔を有する、多孔質の導電性骨格マトリクス材料と、
前記活物質および前記骨格マトリクス材料を少なくとも部分的に包囲するシェルと、
を含み、
前記骨格マトリクス材料が、(i)炭素、(ii)伝導性ポリマー、または(iii)セラミック材料のうちの少なくとも1つを含み、
各前記複合粒子が、前記骨格マトリクス材料中において、前記骨格マトリクス材料の中心から周縁にかけて変化している少なくとも1つの平均材料特性を示し、
前記平均材料特性が以下のものを含み、
(i)前記骨格マトリクス材料の材料組成;
(ii)前記骨格マトリクス材料の、機械的強度、機械的安定性、靱性、硬度を含む機械特性;
(iii)前記中心から前記周縁に向かって低下する、前記骨格マトリクス材料内の欠陥の濃度または不規則度;
(iv)前記骨格マトリクス材料の平均細孔サイズ;
(v)前記骨格マトリクス材料の細孔配向;
(vi)前記骨格マトリクス材料に対する前記活物質の容積分率;
(vii)前記活物質の材料組成;
(viii)前記複合粒子の密度;
前記(iii)においては、前記欠陥の濃度が高い部分で前記活物質の堆積による核形成が促進される、電池電極組成物。 - 前記活物質が、負極活物質であり、かつシリコンを含む、請求項1に記載の電池電極組成物。
- 前記活物質が、正極活物質であり、かつフッ素を含む、請求項1に記載の電池電極組成物。
- 前記骨格マトリクス材料が炭素を含む、請求項1に記載の電池電極組成物。
- 前記シェルが、前記活物質により貯蔵および放出される前記イオンに対して透過性であり、かつ、前記活物質と電解質溶媒との間にバリアを形成する、請求項1に記載の電池電極組成物。
- 前記機械特性が、前記骨格マトリクス材料の前記周縁と比較して、前記骨格マトリクス材料の前記周縁よりも前記骨格マトリクス材料の前記中心の近くにおいて、より低い弾性係数またはより低い硬度を有する、請求項1に記載の電池電極組成物。
- 前記平均細孔サイズが、前記骨格マトリクス材料の前記周縁と比較して、前記骨格マトリクス材料の前記周縁よりも前記骨格マトリクス材料の前記中心の近くで大きくなる、請求項1に記載の電池電極組成物。
- 前記平均細孔サイズが、前記骨格マトリクス材料の前記中心と前記周縁との間に位置する前記骨格マトリクスの中間領域と比較して、前記骨格マトリクス材料の前記周縁よりも前記中心に近い第1領域および前記骨格マトリクス材料の前記中心よりも前記周縁に近い第2領域で大きくなる、請求項1に記載の電池電極組成物。
- 前記骨格マトリクス材料粒子の前記中心での前記平均細孔サイズが2nmから100nmの範囲である、請求項1に記載の電池電極組成物。
- 前記材料組成が、前記骨格マトリクス材料の前記周縁よりも前記骨格マトリクス材料の前記中心の近くにより多く集中する第1の活物質と、前記骨格マトリクス材料の前記中心よりも前記骨格マトリクス材料の前記周縁の近くにより多く集中する第2の活物質とを含み、
前記第1の活物質が前記第2の活物質より高いエネルギー密度を有する、請求項1に記載の電池電極組成物。 - 前記密度が、前記骨格マトリクス材料の前記周縁と比較して、前記骨格マトリクス材料の前記周縁よりも前記骨格マトリクス材料の前記中心の近くで高い、請求項1に記載の電池電極組成物。
- 前記シェルが、80℃超の温度で導電性またはイオン伝導性が減少する感熱性材料で形成される、請求項1に記載の電池電極組成物。
- 各前記複合粒子が、1nmから500nmの範囲の高低差を有する表面粗度を示す、請求項1に記載の電池電極組成物。
- 前記シェルが、伝導性炭素シェルである、請求項1に記載の電池電極組成物。
- イオン透過性の負極電極および正極電極であり、該電極のうち少なくとも1つが請求項1に記載の電池電極組成物を含む、電極と、
前記負極電極および正極電極をイオン的につなぐ電解質と、
前記負極電極および正極電極を電気的に分離するセパレーターと
を含む金属イオン電池。 - 複合粒子を含む電池電極組成物の製造方法であって、
電池作動中にイオンを貯蔵および放出するための高容量活物質であり、該活物質が(i)正極活物質として少なくとも220mAh/gの比容量、または、(ii)負極活物質として少なくとも400mAh/gの比容量を示す高容量活物質を、用意するステップと、
前記活物質が配置される細孔を有する、多孔質の導電性骨格マトリクス材料を形成するステップと、
前記活物質および前記骨格マトリクス材料を少なくとも部分的に包囲するシェルを形成するステップと、を含み、
各前記複合粒子が、前記骨格マトリクス材料中において、前記骨格マトリクス材料の中心から周縁にかけて変化する少なくとも1つの平均材料特性を伴って形成され、
前記骨格マトリクス材料の中心から周縁にかけて変化する前記平均材料特性が、以下のものを含み、
(i)前記骨格マトリクス材料の材料組成;
(ii)前記骨格マトリクス材料の機械特性;
(iii)前記中心から前記周縁に向かって低下する、前記骨格マトリクス材料内の欠陥の濃度または不規則度;
(iv)前記骨格マトリクス材料の平均細孔サイズ;
(v)前記骨格マトリクス材料の細孔配向;
(vi)前記骨格マトリクス材料に対する前記活物質の容積分率;
(vii)前記活物質の材料組成;
(viii)前記複合粒子の密度、
前記(iii)においては、前記欠陥の濃度が高い部分で前記活物質の堆積による核形成が促進される、方法。 - 前記骨格マトリクス材料を形成するステップが、前記骨格マトリクス材料内に1つまたは複数の官能基を、前記骨格マトリクス材料の前記中心から前記周縁にかけて変化する分布を伴って導入するステップを含む、請求項16に記載の方法。
- 前記骨格マトリクス材料を形成するステップが、前記活物質を前記骨格マトリクス材料に浸透させるステップを含む請求項16に記載の方法。
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Also Published As
| Publication number | Publication date |
|---|---|
| US11233235B2 (en) | 2022-01-25 |
| KR102508429B1 (ko) | 2023-03-08 |
| WO2016061216A1 (en) | 2016-04-21 |
| US20230163286A1 (en) | 2023-05-25 |
| EP3207580B1 (en) | 2021-03-10 |
| US10340520B2 (en) | 2019-07-02 |
| CN113381002A (zh) | 2021-09-10 |
| JP2017531907A (ja) | 2017-10-26 |
| US11575129B2 (en) | 2023-02-07 |
| US20190341607A1 (en) | 2019-11-07 |
| KR20170067878A (ko) | 2017-06-16 |
| EP3866229B1 (en) | 2023-11-29 |
| US11855280B2 (en) | 2023-12-26 |
| EP3207580A1 (en) | 2017-08-23 |
| EP3207580A4 (en) | 2018-04-18 |
| US20220077462A1 (en) | 2022-03-10 |
| JP7185668B2 (ja) | 2022-12-07 |
| KR20230039754A (ko) | 2023-03-21 |
| CN107078287A (zh) | 2017-08-18 |
| US20160104882A1 (en) | 2016-04-14 |
| KR102591003B1 (ko) | 2023-10-17 |
| EP3866229A1 (en) | 2021-08-18 |
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