JP2022510186A - 電解液組成物及びこれを利用した二次電池 - Google Patents
電解液組成物及びこれを利用した二次電池 Download PDFInfo
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- JP2022510186A JP2022510186A JP2021529842A JP2021529842A JP2022510186A JP 2022510186 A JP2022510186 A JP 2022510186A JP 2021529842 A JP2021529842 A JP 2021529842A JP 2021529842 A JP2021529842 A JP 2021529842A JP 2022510186 A JP2022510186 A JP 2022510186A
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- electrolytic solution
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- 239000012046 mixed solvent Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- ATHHXGZTWNVVOU-UHFFFAOYSA-N monomethyl-formamide Natural products CNC=O ATHHXGZTWNVVOU-UHFFFAOYSA-N 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- LYGJENNIWJXYER-UHFFFAOYSA-N nitromethane Chemical compound C[N+]([O-])=O LYGJENNIWJXYER-UHFFFAOYSA-N 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 229910001392 phosphorus oxide Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229910052699 polonium Inorganic materials 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920002620 polyvinyl fluoride Polymers 0.000 description 1
- 229920000973 polyvinylchloride carboxylated Polymers 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 229910021481 rutherfordium Inorganic materials 0.000 description 1
- 229910052706 scandium Inorganic materials 0.000 description 1
- 229910021477 seaborgium Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000002153 silicon-carbon composite material Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 229910021384 soft carbon Inorganic materials 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 229910052713 technetium Inorganic materials 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- ZUHZGEOKBKGPSW-UHFFFAOYSA-N tetraglyme Chemical compound COCCOCCOCCOCCOC ZUHZGEOKBKGPSW-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- VSAISIQCTGDGPU-UHFFFAOYSA-N tetraphosphorus hexaoxide Chemical compound O1P(O2)OP3OP1OP2O3 VSAISIQCTGDGPU-UHFFFAOYSA-N 0.000 description 1
- 229910052716 thallium Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 description 1
- WVLBCYQITXONBZ-UHFFFAOYSA-N trimethyl phosphate Chemical compound COP(=O)(OC)OC WVLBCYQITXONBZ-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000005292 vacuum distillation Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- H01M10/0566—Liquid materials
- H01M10/0567—Liquid materials characterised by the additives
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/18—Compounds having one or more C—Si linkages as well as one or more C—O—Si linkages
- C07F7/1804—Compounds having Si-O-C linkages
-
- 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
-
- 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
-
- 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
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
Description
Rは、水素原子又はSi[(CH2)xCH3]y[(CH2)zCF3]3-yであり、
x、y及びzは、それぞれ独立して、0~3の整数である。
Rは、水素原子又はSi[(CH2)xCH3]y[(CH2)zCF3]3-yであり、
x、y及びzは、それぞれ独立して、0~3の整数である。
前記正極集電体としては、電池に化学的変化を誘発することなく導電性を有するものであれば特に制限されずに用いられてよい。具体的に、前記正極集電体としては、アルミニウム、銅、ステンレススチール、ニッケル、チタン、焼成炭素、銅又はステンレススチールの表面にカーボン、ニッケル、チタン、銀などで表面処理したもの、アルミニウム-カドミウム合金などが用いられてよく、特に、アルミニウムが用いられてよい。前記正極集電体は、ホイル、ネット、多孔質体などの種々の形態を有してよく、且つ表面に微細な凹凸を形成して正極活物質の結合力を強化させてもよい。
前記正極活物質としては、リチウムの可逆的なインターカレーション及びデインターカレーションが可能な化合物を用いてよい。具体的に、前記正極活物質としては、コバルト、マンガン、ニッケル、アルミニウム、鉄、又はこれらの組み合わせの金属とリチウムとの複合酸化物又は複合リン酸化物のうちの一種以上を用いてよい。より具体的に、前記正極活物質としては、リチウムコバルト酸化物、リチウムニッケル酸化物、リチウムマンガン酸化物、リチウムニッケルコバルトマンガン酸化物、リチウムニッケルコバルトアルミニウム酸化物、リチウム鉄リン酸化物などを用いてよい。
前記電池容器は、円筒型、角型、薄膜型などであってよい。
反応溶媒としてのアセトニトリル中で化学式3で表される化合物1.4gと1,3-ビス(3,3,3-トリフルオロプロピル)-1,1,3,3-テトラメチルジシラザン3.6gを25℃の温度で1時間反応させた後、真空蒸留にて精製して、化学式4で表される化合物2.8g(収率:98%)を収得した。
実施例1:電解液組成物の調製
エチレンカーボネート(EC)とエチルメチルカーボネート(EMC)とを3:7の体積比で混合した混合溶媒に、LiPF6を1.0Mになるように添加した後、電解液組成物の全体100重量%に対し、下記の化学式2で表される化合物を1重量%の量で添加し、フルオロエチレンカーボネートを3重量%の量で添加して、電解液組成物を調製した。
化学式2で表される化合物の代わりに下記の化学式3で表される化合物を用いることを除いては、実施例1と同様にして電解液組成物を調製した。
化学式2で表される化合物を0.05重量%の量で添加することを除いては、実施例1と同様にして電解液組成物を調製した。
化学式2で表される化合物を3重量%の量で添加することを除いては、実施例1と同様にして電解液組成物を調製した。
フルオロエチレンカーボネートを0.5重量%の量で添加することを除いては、実施例1と同様にして電解液組成物を調製した。
フルオロエチレンカーボネートを20重量%の量で添加することを除いては、実施例1と同様にして電解液組成物を調製した。
化学式2で表される化合物の代わりに下記の化学式4で表される化合物を用いることを除いては、実施例1と同様にして電解液組成物を調製した。
化学式2で表される化合物の代わりに下記の化学式5で表される化合物を用いることを除いては、実施例1と同様にして電解液組成物を調製した。
化学式2で表される化合物の代わりに下記の化学式6で表される化合物を用いることを除いては、実施例1と同様にして電解液組成物を調製した。
化学式2で表される化合物の代わりに下記の化学式7で表される化合物を用いることを除いては、実施例1と同様にして電解液組成物を調製した。
化学式2で表される化合物の代わりに下記の化学式8で表される化合物を用いることを除いては、実施例1と同様にして電解液組成物を調製した。
化学式2で表される化合物の代わりに下記の化学式9で表される化合物を用いることを除いては、実施例1と同様にして電解液組成物を調製した。
化学式2で表される化合物を添加しないことを除いては、実施例1と同様にして電解液組成物を調製した。
フルオロエチレンカーボネートを添加しないことを除いては、実施例1と同様にして電解液組成物を調製した。
フルオロエチレンカーボネートを添加しないことを除いては、実施例2と同様にして電解液組成物を調製した。
フルオロエチレンカーボネートを添加しないことを除いては、実施例7と同様にして電解液組成物を調製した。
化学式2で表される化合物の代わりに下記の化学式aで表される化合物を用いることを除いては、実施例1と同様にして電解液組成物を調製した。
前記実施例及び比較例で調製された電解液組成物を用いて下記のように二次電池を製造し、このときの常温寿命特性、高温安定性、及び高温寿命特性を下記のような方法にて測定し、電解液組成物の保存後の変色特性を観察して、その結果を下記の表1に表した。
正極活物質としてLiNi1/3Co1/3Mn1/3O2粉末、炭素導電材(Super-P;Timcal Ltd.)及びPVDF(polyvinylidene fluoride)バインダーを90:5:5の重量比で混合した混合物に、溶媒としてN-メチルピロリドン(NMP)を固形分の含量が60重量%となるように添加して正極スラリーを調製した。15μm厚さのアルミニウム箔の上に約40μmの厚さで前記正極スラリーをコーティングした。これを常温で乾燥し、120℃でさらに乾燥した後に圧延して、正極を製造した。
前記化成ステップを経た二次電池を25℃で、1.0Cの電流にて電圧が4.2Vに達するまで定電流充電し、4.2Vを維持しながら電流が0.05Cになるまで定電圧充電した。次いで、放電時に電圧が2.5Vに達するまで1.0Cの定電流で放電するサイクルを300回繰り返した。
[数学式1]
容量維持率[%]=[300回目のサイクルにおける放電容量/1回目のサイクルにおける放電容量]×100
(2)高温電圧保存安定性
前記化成ステップを経た二次電池を25℃で、1.0Cの電流にて電圧が4.2Vに達するまで定電流充電し、4.2Vを維持しながら電流が0.05Cになるまで定電圧充電した。次いで、充電された二次電池を60℃で保管しながら24時間毎にmulti-meterを利用して電圧を測定して充電状態セルの高温での残留電圧を測定して、高温電圧保存安定性を測定した。
[数学式2]
電圧維持率[%]=[15日目の開放電圧/初期開放電圧]×100
(3)変色特性
実施例及び比較例で調製された電解液組成物を60℃下で15日間保存後の色変化を観察し、下記の評価基準にて評価した。
○:色変化なし
×:色変化あり
(4)高温寿命特性
前記化成ステップを経た二次電池を45℃で、1.0Cの電流にて電圧が4.2Vに達するまで定電流充電し、4.2Vを維持しながら電流が0.05Cになるまで定電圧充電した。次いで、放電時に電圧が2.5Vに達するまで1.0Cの定電流で放電するサイクルを300回繰り返した。
Claims (10)
- Rは、Si[(CH2)xCH3]y[(CH2)zCF3]3-yであり、x、y及びzは、それぞれ独立して、0~3の整数である、請求項1に記載の電解液組成物。
- 前記化学式1で表される化合物は、電解液組成物の全体100重量%に対し、0.05~5重量%の量で含まれる、請求項1に記載の電解液組成物。
- 前記環状フルオロカーボネート系化合物は、フルオロエチレンカーボネートを含む、請求項1に記載の電解液組成物。
- 前記環状フルオロカーボネート系化合物は、電解液組成物の全体100重量%に対し、0.5~30重量%の量で含まれる、請求項1に記載の電解液組成物。
- 前記化学式1で表される化合物と環状フルオロカーボネート系化合物との重量比は、1:1~1:20である、請求項1に記載の電解液組成物。
- リチウム塩を更に含む、請求項1に記載の電解液組成物。
- 請求項1~8のいずれか一項に記載の電解液組成物を含む二次電池。
- 当該二次電池がリチウム二次電池である、請求項9に記載の二次電池。
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- 2019-11-19 EP EP19891029.1A patent/EP3890092A4/en active Pending
- 2019-11-19 CN CN201980077640.3A patent/CN113169376B/zh active Active
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EP3890092A1 (en) | 2021-10-06 |
CN113169376A (zh) | 2021-07-23 |
US20210399343A1 (en) | 2021-12-23 |
JP7194281B2 (ja) | 2022-12-21 |
EP3890092A4 (en) | 2023-03-01 |
CN113169376B (zh) | 2024-05-14 |
KR102138128B1 (ko) | 2020-07-27 |
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