JP6310242B2 - 二次電池用正極、および二次電池。 - Google Patents
二次電池用正極、および二次電池。 Download PDFInfo
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- JP6310242B2 JP6310242B2 JP2013250380A JP2013250380A JP6310242B2 JP 6310242 B2 JP6310242 B2 JP 6310242B2 JP 2013250380 A JP2013250380 A JP 2013250380A JP 2013250380 A JP2013250380 A JP 2013250380A JP 6310242 B2 JP6310242 B2 JP 6310242B2
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- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
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- PWLNAUNEAKQYLH-UHFFFAOYSA-N butyric acid octyl ester Natural products CCCCCCCCOC(=O)CCC PWLNAUNEAKQYLH-UHFFFAOYSA-N 0.000 description 1
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- FWIKARPOTLJBLM-UHFFFAOYSA-L dilithium;dodecylbenzene;sulfate Chemical compound [Li+].[Li+].[O-]S([O-])(=O)=O.CCCCCCCCCCCCC1=CC=CC=C1 FWIKARPOTLJBLM-UHFFFAOYSA-L 0.000 description 1
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- IRDCEJVOXCGYAV-UHFFFAOYSA-M lithium;2-dodecylbenzenesulfonate Chemical compound [Li+].CCCCCCCCCCCCC1=CC=CC=C1S([O-])(=O)=O IRDCEJVOXCGYAV-UHFFFAOYSA-M 0.000 description 1
- ACFSQHQYDZIPRL-UHFFFAOYSA-N lithium;bis(1,1,2,2,2-pentafluoroethylsulfonyl)azanide Chemical compound [Li+].FC(F)(F)C(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)C(F)(F)F ACFSQHQYDZIPRL-UHFFFAOYSA-N 0.000 description 1
- UPSGVQKYBQAFEJ-UHFFFAOYSA-M lithium;octadecyl sulfate Chemical compound [Li+].CCCCCCCCCCCCCCCCCCOS([O-])(=O)=O UPSGVQKYBQAFEJ-UHFFFAOYSA-M 0.000 description 1
- JFNAJRJKQQEFNH-UHFFFAOYSA-M lithium;octane-1-sulfonate Chemical compound [Li+].CCCCCCCCS([O-])(=O)=O JFNAJRJKQQEFNH-UHFFFAOYSA-M 0.000 description 1
- OTDYODFYMAIHFA-UHFFFAOYSA-M lithium;octyl sulfate Chemical compound [Li+].CCCCCCCCOS([O-])(=O)=O OTDYODFYMAIHFA-UHFFFAOYSA-M 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- UUIQMZJEGPQKFD-UHFFFAOYSA-N n-butyric acid methyl ester Natural products CCCC(=O)OC UUIQMZJEGPQKFD-UHFFFAOYSA-N 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
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- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- ZNNZYHKDIALBAK-UHFFFAOYSA-M potassium thiocyanate Chemical compound [K+].[S-]C#N ZNNZYHKDIALBAK-UHFFFAOYSA-M 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
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- 239000002994 raw material Substances 0.000 description 1
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- 229910052708 sodium Inorganic materials 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 description 1
- VGTPCRGMBIAPIM-UHFFFAOYSA-M sodium thiocyanate Chemical compound [Na+].[S-]C#N VGTPCRGMBIAPIM-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000008247 solid mixture Substances 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 description 1
- 150000008053 sultones Chemical class 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- VOVUARRWDCVURC-UHFFFAOYSA-N thiirane Chemical compound C1CS1 VOVUARRWDCVURC-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- KAKZBPTYRLMSJV-UHFFFAOYSA-N vinyl-ethylene Natural products C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
-
- 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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
Description
まず、本発明の一実施形態に係る二次電池の概要について説明を行う。
以下では、図1を参照して、上述した本発明の一実施形態に係る二次電池10の具体的な構成について説明を行う。図1は、本発明の一実施形態に係る二次電池の構成を説明する説明図である。
次に、本発明の一実施形態に係る二次電池10の作製方法について説明する。なお、本発明の一実施形態に係る二次電池10では、上述した第1の導電助剤を複合化させた複合化正極活物質、第2の導電助剤、およびバインダーを用いた他は、従来のリチウムイオン二次電池と同様の作製方法を用いて本発明の一実施形態に係る二次電池10を作製することが可能である。なお、本発明の一実施形態に係る二次電池10の作製方法は概略的には以下のとおりである。
まず、以下の方法で実施例1に係る二次電池用正極の作製を行った。
さらに、上記で作製した実施例1〜9、比較例1〜10に係る二次電池用正極を用いて、以下の方法で二次電池を作製した。
上記で測定した実施例1〜9、比較例1〜10に係る二次電池用正極の正極活物質層の体積密度、および二次電池の容量維持率の評価結果を表1にて示す。
20 正極
21 集電体
22 正極活物質層
30 負極
31 集電体
32 負極活物質層
40 セパレータ層
Claims (5)
- 正極活物質および前記正極活物質の表面に複合化された第1の導電助剤を含む複合化正極活物質と、第2の導電助剤と、バインダーと、を含み、
前記バインダーの引っ張り弾性率は、900MPa以下であり、
前記第1の導電助剤は、鱗片状黒鉛またはグラフェンであり、前記第1の導電助剤の平均粒子径は0.5μm以上3μm以下であり、前記複合化正極活物質の総質量に対して0.3質量%以上1.0質量%以下で複合化され、
前記第1の導電助剤および前記第2の導電助剤の含有量の和は、前記複合化正極活物質の総質量に対して、0.6質量%以上2.0質量%以下である、二次電池用正極。 - 前記正極活物質は、リチウム含有遷移金属酸化物を含む、請求項1に記載の二次電池用正極。
- 前記バインダーは、少なくとも1つ以上の共重合体を含む、請求項1または2に記載の二次電池用正極。
- 前記バインダーは、フッ化ビニリデン‐テトラフルオロエチレン共重合体、フッ化ビニリデン‐クロロトリフルオロエチレン共重合体、およびポリフッ化ビニリデンと水素化アクリロニトリルブタジエン共重合体との混合物からなる群より選択されたいずれか1つである、請求項3に記載の二次電池用正極。
- 請求項1〜4のいずれか一項に記載の二次電池用正極を備える、二次電池。
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