JP7179184B2 - 全固体電池の電極の製造方法及びこれによって製造された全固体電池電極 - Google Patents
全固体電池の電極の製造方法及びこれによって製造された全固体電池電極 Download PDFInfo
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Description
正極活物質として、LiNi0.8Co0.1Mn0.1O2 45g、固体電解質3.5g、及びバインダーとしてPVDF 0.4gをN-メチルピロリドン溶媒に付け加えて混合することにより、電極活物質と固体電解質が均一に混合された状態の1次スラリーを製造する。
正極活物質として、LiNi0.8Co0.1Mn0.1O2 45g、固体電解質6.78g、導電材として平均粒径が20nm~30nmのカーボンブラック0.81g及びバインダーとしてPVDF 1.62gをN-メチルピロリドン溶媒に付け加えて混合して正極スラリーを製造する(最終組成=正極活物質:導電材:バインダー:固体電解質=83:1.5:3:12.5)。
コインハーフセルの総容量及びレート特性の測定
前記実施例及び比較例で製造された正極スラリーをアルミニウム集電体に塗布した後、乾燥及び圧延して正極を製造し、前記正極を用いてコインハーフセル形態の電池を製造した。
20、120、121、220 固体電解質
30、130、230 導電材
40 三重点
Claims (10)
- (a)電極活物質、固体電解質及び第1バインダーを第1溶媒と混合して1次スラリーを製造する段階と、
(b)前記1次スラリーを乾燥させて混合物パウダーを製造する段階と、
(c)前記混合物パウダー、導電材及び第2バインダーを第2溶媒と混合して2次スラリーを製造する段階と、
(d)前記2次スラリーを集電体にコートする段階と、
を含み、
前記第1バインダーは前記第1溶媒に溶解するが第2溶媒には溶解しない、全固体電池の電極の製造方法。 - 前記第1バインダーと第2バインダーは互いに異なる種類である、請求項1に記載の全固体電池の電極の製造方法。
- 前記第1溶媒は非水性溶媒であり、前記第1バインダーは非水系バインダーであり、前記第2溶媒は水性溶媒であり、前記第2バインダーは水系バインダーである、請求項1に記載の全固体電池の電極の製造方法。
- 前記第1溶媒は、N-メチルピロリドン(NMP)、アクリロニトリル(ACN)、ジメチルホルムアミド(DMF)又はジメチルスルホキシド(DMSO)であり、前記第1バインダーは、N,N-ビス[3-(トリエトキシシリル)プロピル]ウレア、ポリエチレンオキシド(PEO)、ポリ(ビニリデンフルオリド)(PVDF)及びポリ(ビニリデンフルオリド-コ-ヘキサフルオロプロピレン)(PVDF-co-HFP)からなる群から選択されるいずれか1種又は2種以上の混合物であり、前記第2溶媒は水であり、前記第2バインダーは、スチレンブタジエンゴム(SBR)、ブタジエンゴム(BR)、ニトリルブタジエンゴム(NBR)、スチレンブタジエンスチレンブロック重合体(SBS)、スチレンエチレンブタジエンブロック重合体(SEB)、スチレン-(スチレンブタジエン)-スチレンブロック重合体、スチレンブタジエンゴム-カルボキシメチルセルロース(SBR-CMC)、天然ゴム(NR)、イソプレンゴム(IR)、エチレン-プロピレン-ジエン三元共重合体(EPDM)、ポリビニルアルコール(PVA)、ポリアクリル酸(PAA)及びポリ(エチレン-コ-プロピレン-コ-5-メチレン-2-ノルボルネン)(Poly(ethylene-co-propylene-co-5-methylene-2-norbornene)からなる群から選択されるいずれか1種又は2種以上の混合物である、請求項3に記載の全固体電池の電極の製造方法。
- 前記導電材の平均粒径は30ナノメートル以下である、請求項1から4のいずれか一項に記載の全固体電池の電極の製造方法。
- 前記1次スラリーの前記電極活物質と固体電解質は均一な接触面を形成している、請求項1から5のいずれか一項に記載の全固体電池の電極の製造方法。
- 前記段階(c)で追加された導電材は電極活物質及び固体電解質の間の空隙に位置する、請求項1から6のいずれか一項に記載の全固体電池の電極の製造方法。
- 前記2次スラリーの電極活物質、固体電解質及び導電材は共通接触点を形成し、混合された状態を有する、請求項1から7のいずれか一項に記載の全固体電池の電極の製造方法。
- 前記段階(c)で固体電解質をさらに追加する、請求項1から8のいずれか一項に記載の全固体電池の電極の製造方法。
- 前記2次スラリーに含まれた固体電解質の含量は固形分全体に対して5重量%~10重量%である、請求項1から9のいずれか一項に記載の全固体電池の電極の製造方法。
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- 2020-05-08 CN CN202080033934.9A patent/CN113812020A/zh active Pending
- 2020-05-08 US US17/417,300 patent/US20220077468A1/en active Pending
- 2020-05-08 WO PCT/KR2020/006084 patent/WO2020226448A1/ko unknown
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JP2022512483A (ja) | 2022-02-04 |
EP3907788A1 (en) | 2021-11-10 |
EP3907788A4 (en) | 2022-03-09 |
CN113812020A (zh) | 2021-12-17 |
KR20200129380A (ko) | 2020-11-18 |
WO2020226448A1 (ko) | 2020-11-12 |
US20220077468A1 (en) | 2022-03-10 |
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