JP7041804B2 - 固体電解質を含む全固体電池用の電極 - Google Patents
固体電解質を含む全固体電池用の電極 Download PDFInfo
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- JP7041804B2 JP7041804B2 JP2019542609A JP2019542609A JP7041804B2 JP 7041804 B2 JP7041804 B2 JP 7041804B2 JP 2019542609 A JP2019542609 A JP 2019542609A JP 2019542609 A JP2019542609 A JP 2019542609A JP 7041804 B2 JP7041804 B2 JP 7041804B2
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- 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Description
(1)負極の製造
平均粒径(D50)が20μmである人造黒鉛、導電材であるカーボンブラック、高分子固体電解質(PEO+LiFSI(Lithium bis(fluorosulfonyl)imide)、20:1(mol比))及び線状構造体であるVGCF(気相成長カーボンファイバー、長さ20μm)を、70:5:20:5の重量比で混合し、5gの混合物を製造した。前記混合物にアセトニトリル(AN)を添加して固形分の含量を30%に合わせて負極スラリーを製造した。
1.4875cm2の円形に打ち抜かれた負極と、1.7671cm2の円形に切断したリチウム金属薄膜とを相対電極にし、コイン型ハーフセルを製造した。具体的に、前記リチウム金属と前記負極との間に、50μm厚さの高分子セパレータ膜(PEO+LiFSI,20:1(mol比))を介在して電極組立体を製造した。
線状構造体として、VGCFの代わりにCNT(カーボンナノチューブ、長さ15μm)を適用したことを除いて、実施例1で製造された方法と同様の方法で電極組立体を製造した。
線状構造体として、VGCFの代わりにCNF(カーボンナノファイバー、長さ50μm)を適用したことを除いて、実施例1で製造された方法と同じ方法で電極組立体を製造した。
線状構造体として、VGCFの代わりにHNT(ハロイサイトナノチューブ,Sigma-Aldrich社,長さ3μm)を適用したことを除いて、実施例1で製造された方法と同様の方法で電極組立体を製造した。
線状構造体を使わず、平均粒径(D50)が20μmである人造黒鉛、導電材であるカーボンブラック、高分子固体電解質(PEO+LiFSI,20:1(mol比))を、70:10:20の重量比で混合することを除いて、実施例1で製造された方法と同様の方法で電極組立体を製造した。
実施例1~4及び比較例1で製造された電池に対して充・放電を行い、放電容量維持率を評価し、これを下記の表1に示した。一方、寿命特性評価時、60℃の温度で、0.05Cで充・放電し、10回のサイクルは放電(リチウムが負極に存在しない状態)状態で終了し、容量維持率を評価した。
充電条件:CC(定電流)/CV(定電圧)(5mV/0.005 C current cut-off)
放電条件:CC(定電流)条件 1.5V
20 電極活物質層
21 電極活物質粒子
22 固体電解質
23 導電材
24 線状構造体
Claims (7)
- 電極集電体と、
前記電極集電体の少なくとも一面に形成された電極活物質層と、を含み、
前記電極活物質層は、複数の電極活物質粒子と、前記複数の電極活物質粒子の表面の少なくとも一部にコーティングされており、前記複数の電極活物質粒子を相互連結する固体電解質と、前記複数の電極活物質粒子の間に分散している線状構造体と、を含み、
前記線状構造体はセラミック材料を含み、前記セラミック材料は、金属酸化物及び金属窒化物より選択された一種以上を含むことを特徴とする全固体電池用の電極。 - 前記電極活物質層は、前記複数の電極活物質粒子の表面と、前記固体電解質の内部または表面とに分散している導電材をさらに含むことを特徴とする請求項1に記載の全固体電池用の電極。
- 前記複数の電極活物質粒子と前記線状構造体との間に微細空隙チャンネルが形成されていることを特徴とする請求項1または2に記載の全固体電池用の電極。
- 前記固体電解質が、高分子固体電解質、高分子ゲル電解質、硫化物系固体電解質及び酸化物系固体電解質からなる群より選択されるいずれか一つまたはこれらの二種以上の混合物を含むことを特徴とする請求項1から3の何れか一項に記載の全固体電池用の電極。
- 前記線状構造体が、セラミック材料と、前記セラミック材料の表面に被覆された導電性材料と、を含むことを特徴とする請求項1に記載の全固体電池用の電極。
- 前記線状構造体の長さが1~100μmであることを特徴とする請求項1から5の何れか一項に記載の全固体電池用の電極。
- 正極、負極及び前記正極と負極との間に介在された固体電解質層を含み、前記正極及び負極の少なくとも一つが、請求項1から請求項6のいずれか一項に記載の電極であることを特徴とする全固体電池。
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PCT/KR2018/010643 WO2019054729A1 (ko) | 2017-09-13 | 2018-09-11 | 고체 전해질을 포함하는 전고체 전지용 전극 |
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US (1) | US12113186B2 (ja) |
EP (1) | EP3579307B1 (ja) |
JP (1) | JP7041804B2 (ja) |
KR (1) | KR102170305B1 (ja) |
CN (2) | CN209071510U (ja) |
ES (1) | ES2973310T3 (ja) |
HU (1) | HUE066280T2 (ja) |
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EP3579307A1 (en) | 2019-12-11 |
CN209071510U (zh) | 2019-07-05 |
EP3579307B1 (en) | 2024-02-21 |
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WO2019054729A1 (ko) | 2019-03-21 |
US12113186B2 (en) | 2024-10-08 |
KR102170305B1 (ko) | 2020-10-26 |
KR20190030176A (ko) | 2019-03-21 |
CN109494347A (zh) | 2019-03-19 |
PL3579307T3 (pl) | 2024-05-06 |
CN109494347B (zh) | 2020-12-04 |
HUE066280T2 (hu) | 2024-07-28 |
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