JP2022514514A - 全固体電池用電解質膜及びそれを含む全固体電池 - Google Patents
全固体電池用電解質膜及びそれを含む全固体電池 Download PDFInfo
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- JP2022514514A JP2022514514A JP2021533643A JP2021533643A JP2022514514A JP 2022514514 A JP2022514514 A JP 2022514514A JP 2021533643 A JP2021533643 A JP 2021533643A JP 2021533643 A JP2021533643 A JP 2021533643A JP 2022514514 A JP2022514514 A JP 2022514514A
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- solid electrolyte
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- electrolyte membrane
- state battery
- lithium
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Images
Classifications
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0561—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
- H01M10/0562—Solid materials
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
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Abstract
Description
1.リチウムデンドライト誘導物質が含まれた電解質フィルムの製造
以下の方法で電解質フィルムを製造した。溶媒としてアセトニトリル(AN)にポリエチレンオキサイド(Mw=4,000,000g/mol)を溶かして4wt%の高分子溶液を用意した。このとき、リチウム塩としてLiTFSIを[EO]/[Li+]=18/1(モル比)になるように一緒に入れた。前記高分子溶液でPEOとリチウム塩が十分に溶けるように60℃で一晩撹拌した。次いで、金ナノ粒子(シグマ-アルドリッチ社製、粒径100nm)を、追加精製せず、電解質膜の重量対比1wt%になるように前記高分子溶液に添加し、一日間追加的に撹拌した。次いで、開始剤と硬化剤を含む添加剤溶液を用意した。硬化剤としてはポリエチレングリコールジアクリレート(PEGDA、Mw=575)、開始剤としては過酸化ベンゾイル(BPO)を使用し、PEGDAはPEO対比20wt%、BPOはPEGDA対比1wt%の量になるようにし、溶媒としてはアセトニトリルを使用した。前記添加剤溶液は、投入した成分が十分混合されるように約1時間撹拌した。その後、前記添加剤溶液を前記高分子溶液に添加し、二つの溶液を十分に混合した。混合した溶液を離型フィルムにドクターブレードを用いて塗布及びコーティングした。コーティングギャップは800μm、コーティング速度は20mm/minにした。前記溶液がコーティングされた離型フィルムをガラス板に移動させて水平をよく維持し、常温条件で一晩乾燥して、100℃で12時間真空乾燥した。このような方式で電解質フィルムを収得した。得られた電解質層の厚さは約50μmであった。
スラリーを製作するため、電極活物質としてのNCM811(LiNi0.8Co0.1Mn0.1O2)、導電材としてのVGCF(気相法炭素繊維(vapor grown carbon fiber))及び高分子系固体電解質(PEO:LiTFSI=18:1(モル比))を80:3:17の重量比で混合し、アセトニトリルに投入し撹拌して電極スラリーを製造した。該スラリーを、厚さ20μmのアルミニウム集電体にドクターブレードを用いて塗布し、その結果物を120℃で4時間真空乾燥した。真空乾燥の結果物をロールプレスを用いて圧延工程を行って、2mAh/cm2の電極ローディング、電極層の厚さ48μm、気孔度22%の電極を収得した。
製造された正極を1.4875cm2の円形に打ち抜いて用意した。1.7671cm2の円形で切断したリチウム金属薄膜を相対電極として用意した。二つの電極の間に収得した固体電解質膜を介在させてコイン型ハーフセルを製造した。
リチウムデンドライト誘導物質の含量を2wt%にしたことを除き、実施例1と同じ方法で固体電解質膜を製造した。また、製造された固体電解質膜を用いて実施例1と同じ方法で電池を製造した。
リチウムデンドライト誘導物質の含量を10wt%にしたことを除き、実施例1と同じ方法で固体電解質膜を製造した。また、製造された固体電解質膜を用いて実施例1と同じ方法で電池を製造した。
リチウムデンドライト誘導物質として銀ナノ粒子(シグマ-アルドリッチ社製、粒径100nm)を使用し、含量を2wt%にしたことを除き、実施例1と同じ方法で固体電解質膜を製造した。また、製造された固体電解質膜を用いて実施例1と同じ方法で電池を製造した。
リチウムデンドライト誘導物質を含まないことを除き、実施例1と同じ方法で固体電解質膜を製造した。また、製造された固体電解質膜を用いて実施例1と同じ方法で電池を製造した。
それぞれの実施例及び比較例で製作された固体電解質膜を用いてイオン伝導度を測定した。実施例及び比較例で製作された固体電解質膜をそれぞれ1.7671cm2の円形で切断した。それを二枚のステンレス鋼(SUS)の間に配置してコインセルを製作した。分析装置(VMP3、バイオロジック社製)を使用して60℃、振幅10mV及びスキャンレンジ500KHz~20MHzの条件で電気化学的インピーダンスを測定し、それに基づいてイオン伝導度を計算した。
実施例1~5及び比較例1~4で製造された電池に対し、60℃、0.05Cで充電及び放電を行って初期放電容量を評価した。
放電条件:CC(定電流)条件3V、(0.05C)
1.リチウムデンドライト誘導物質が含まれた電解質膜の製造
以下の方法で電解質膜を製造した。溶媒としてアセトニトリル(AN)にポリエチレンオキサイド(Mw=4,000,000g/mol)を溶かして4wt%の高分子溶液を用意した。このとき、リチウム塩としてLiTFSIを[EO]/[Li+]=18/1(モル比)になるように一緒に入れた。前記高分子溶液でPEOとリチウム塩が十分に溶けるように60℃で一晩撹拌した。次いで、金ナノ粒子(シグマ-アルドリッチ社製、粒径100nm)を、追加精製せず、電解質膜の重量対比1wt%になるように前記高分子溶液に添加し、一日間追加的に撹拌した。次いで、開始剤と硬化剤を含む添加剤溶液を用意した。硬化剤としてはポリエチレングリコールジアクリレート(PEGDA、Mw=575)、開始剤としては過酸化ベンゾイル(BPO)を使用し、PEGDAはPEO対比20wt%、BPOはPEGDA対比1wt%の量になるようにし、溶媒としてはアセトニトリルを使用した。前記添加剤溶液は、投入した成分が十分混合されるように約1時間撹拌した。その後、前記添加剤溶液を前記高分子溶液に添加し、二つの溶液を十分に混合した。混合した溶液を離型フィルムにドクターブレードを用いて塗布及びコーティングした。コーティングギャップは800μm、コーティング速度は20mm/minにした。前記溶液がコーティングされた離型フィルムをガラス板に移動させて水平をよく維持し、常温条件で一晩乾燥して、100℃で12時間真空乾燥した。このような方式で電解質膜を収得した。得られた電解質膜の厚さは約50μmであった。
Claims (12)
- 固体電解質材料及び金属粒子を含み、前記金属粒子はリチウムと合金化可能なものである、全固体電池用固体電解質膜。
- 前記金属粒子は、リチウム金属核生成過電位が100mV以下である、請求項1に記載の全固体電池用固体電解質膜。
- 前記固体電解質膜が金属粒子としてAu、Ag、Pt、Zn、Mg、Al、Ni、Biまたはこれらのうち二つ以上を含む、請求項1に記載の全固体電池用固体電解質膜。
- 前記固体電解質材料が高分子系固体電解質材料を含む、請求項1に記載の全固体電池用固体電解質膜。
- 前記高分子系固体電解質材料が高分子樹脂及びリチウム塩を含み、1×10-7S/cm以上のイオン伝導度を有する、請求項1に記載の全固体電池用固体電解質膜。
- 前記金属粒子は、粒径が1nm~5μmである、請求項1に記載の全固体電池用固体電解質膜。
- 前記金属粒子が固体電解質膜100重量%に対して0.1wt%~20wt%の比率で含まれる、請求項1に記載の全固体電池用固体電解質膜。
- 前記全固体電池用固体電解質膜がその一面または両面の表面に、前記金属粒子を含まない固体電解質部を備える、請求項1に記載の全固体電池用固体電解質膜。
- 請求項1から8のいずれか一項に記載の固体電解質膜を含む全固体電池。
- 前記全固体電池は、負極が負極活物質としてリチウム金属を含むか又は負極活物質なしに集電体のみから構成される、請求項9に記載の全固体電池。
- 前記全固体電池は負極、正極及び固体電解質膜を含み、前記固体電解質膜は前記負極と正極との間に介在され、前記負極及び正極のうちの少なくとも一つは固体電解質材料を含み、前記固体電解質材料は高分子系固体電解質、酸化物系固体電解質、硫化物系固体電解質またはこれらのうち二つ以上を含む、請求項9に記載の全固体電池。
- 前記全固体電池は、前記固体電解質膜の負極との対面部に固体電解質部が配置されている、請求項11に記載の全固体電池。
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US20180172135A1 (en) * | 2016-12-16 | 2018-06-21 | Hyundai Motor Company | Low porosity solid electrolyte membrane and method for manufacturing the same |
US20180342768A1 (en) * | 2016-12-16 | 2018-11-29 | Hyundai Motor Company | Low porosity solid electrolyte membrane and method for manufacturing the same |
KR20180123913A (ko) * | 2017-05-10 | 2018-11-20 | 한국전자통신연구원 | 리튬 전지용 전극 구조체의 제조 방법 및 이를 이용한 리튬 전지의 제조 방법 |
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US20210408579A1 (en) | 2021-12-30 |
CN113661594A (zh) | 2021-11-16 |
KR20200122659A (ko) | 2020-10-28 |
JP7222096B2 (ja) | 2023-02-14 |
WO2020214008A1 (ko) | 2020-10-22 |
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