JP4100341B2 - リチウム二次電池用正極材料及びそれを用いたリチウム二次電池 - Google Patents
リチウム二次電池用正極材料及びそれを用いたリチウム二次電池 Download PDFInfo
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- 239000007774 positive electrode material Substances 0.000 title claims description 135
- 229910052744 lithium Inorganic materials 0.000 title claims description 51
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims description 49
- 229910001416 lithium ion Inorganic materials 0.000 claims description 46
- 239000000203 mixture Substances 0.000 claims description 34
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 9
- 239000004020 conductor Substances 0.000 claims description 9
- 150000002500 ions Chemical class 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 6
- 229910052796 boron Inorganic materials 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 229910052733 gallium Inorganic materials 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 6
- 229910052749 magnesium Inorganic materials 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 229910052725 zinc Inorganic materials 0.000 claims description 6
- 229910003481 amorphous carbon Inorganic materials 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000000634 powder X-ray diffraction Methods 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims 2
- 239000010439 graphite Substances 0.000 claims 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 31
- 229910052723 transition metal Inorganic materials 0.000 description 26
- 150000003624 transition metals Chemical class 0.000 description 24
- 230000000052 comparative effect Effects 0.000 description 19
- 238000012360 testing method Methods 0.000 description 19
- 239000013078 crystal Substances 0.000 description 17
- 239000011572 manganese Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 16
- 238000007600 charging Methods 0.000 description 12
- 238000002441 X-ray diffraction Methods 0.000 description 11
- 238000010304 firing Methods 0.000 description 11
- 239000008151 electrolyte solution Substances 0.000 description 9
- 239000010410 layer Substances 0.000 description 9
- 239000002994 raw material Substances 0.000 description 7
- 239000002356 single layer Substances 0.000 description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 239000003792 electrolyte Substances 0.000 description 6
- 229910052748 manganese Inorganic materials 0.000 description 6
- 230000005856 abnormality Effects 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007773 negative electrode material Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000010277 constant-current charging Methods 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- -1 lithium transition metal Chemical class 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000011255 nonaqueous electrolyte Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000011164 primary particle Substances 0.000 description 3
- 230000001172 regenerating effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 229910013716 LiNi Inorganic materials 0.000 description 2
- 229910013290 LiNiO 2 Inorganic materials 0.000 description 2
- 229910013870 LiPF 6 Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000010406 cathode material Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000003776 cleavage reaction Methods 0.000 description 2
- 238000010280 constant potential charging Methods 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 230000000994 depressogenic effect Effects 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 239000002905 metal composite material Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000007017 scission Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 229910006566 Li1.02Mn0.40Ni0.55Co0.05O2 Inorganic materials 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 239000002194 amorphous carbon material Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 230000009194 climbing Effects 0.000 description 1
- 229910000428 cobalt oxide Inorganic materials 0.000 description 1
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- XGZVUEUWXADBQD-UHFFFAOYSA-L lithium carbonate Chemical compound [Li+].[Li+].[O-]C([O-])=O XGZVUEUWXADBQD-UHFFFAOYSA-L 0.000 description 1
- 229910052808 lithium carbonate Inorganic materials 0.000 description 1
- 229910003002 lithium salt Inorganic materials 0.000 description 1
- 159000000002 lithium salts Chemical class 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- CQDGTJPVBWZJAZ-UHFFFAOYSA-N monoethyl carbonate Chemical compound CCOC(O)=O CQDGTJPVBWZJAZ-UHFFFAOYSA-N 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229910000480 nickel oxide Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- GNRSAWUEBMWBQH-UHFFFAOYSA-N oxonickel Chemical compound [Ni]=O GNRSAWUEBMWBQH-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010278 pulse charging Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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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
-
- 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
- H01M4/362—Composites
- H01M4/366—Composites as layered products
-
- 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
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- 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
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
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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
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/543—Terminals
- H01M50/552—Terminals characterised by their shape
- H01M50/559—Terminals adapted for cells having curved cross-section, e.g. round, elliptic or button cells
- H01M50/56—Cup shaped terminals
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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
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
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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
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
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- H01M4/04—Processes of manufacture in general
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- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
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- 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
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- 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
- H01M4/139—Processes of manufacture
- H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
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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
- 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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- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Description
(正極材料の作製)
本実施例では、原料として二酸化マンガン、酸化コバルト、酸化ニッケル及び炭酸リチウムを使用し、所定の元素比となるように秤量した後、エタノールを加え、遊星ボールミルにより湿式で5時間粉砕、混合した。次に、この粉末に1000℃で10〜30時間の焼成を行った後、粉末を解砕して層状正極材料(1)を得た。
次に、正極材料(1)の特性を評価するための正極板を以下の手順で作製した。あらかじめ結着剤を溶媒のN-メチル-2-ピロリジノン(以下、NMPと略す)に溶解した溶液と層状正極材料及び炭素系導電材を均一に混合して正極合材スラリーを作製した。このとき、正極材料、炭素系導電材及び結着剤を重量百分率比で表してそれぞれ、85:10.7:4.3の割合となるように混合した。このスラリーを、厚み20μmのアルミ集電体箔上に均一に塗布した後、100℃で乾燥し、プレスにて1.5ton/cm2で加圧し、約40μm厚の塗膜を形成した。
次に、円筒型電池を作製して正極材料のサイクル寿命特性及び安全性を評価するため、正極材料(1)〜(3)を用いた正極板を塗布幅5.4cm、塗布長さ50cmとなるよう切断し、電流を取り出すためにアルミニウム箔製のリード片を溶接し正極板を作製した。
作製した電池の充放電サイクル特性の評価は,充電終止電圧4.2V,放電終止電圧3.0Vとし、0.5Cの放電レートで行った。各電池で200サイクルの寿命試験を行った結果を表2に示す。遷移金属に占めるNi組成が44%以下のときは、200サイクルでの容量維持率が85%以上であったが、後述するNi組成が0.45以上の比較正極材料を用いたときの容量維持率は54%であり、サイクル寿命の劣化が認められた。
次に、実施例1の正極材料(1)〜(3)を用いて作製した電池(1)〜(3)の各リチウム二次電池の安全性を検討するため、内部短絡試験(釘さし試験)を行った。この試験の充電条件は、充電電流200mAで充電終止電圧4.25Vまで定電流充電した後、4.25Vの定電圧で8時間充電する定電流定電圧充電とした。電池(1)〜(3)に対して10本の電池を充電した後、直径5mmの釘を各電池の側面から貫通速度10cm/分で貫通させ、開裂弁の作動、発火、破裂などの異常の有無を観察した。以上の手順により各電池10本の異常発生確率を調べた。
本比較例では、実施例1と同様の手順で作製した表1に示す組成の比較正極材料(1)、(2)について、実施例1と同様の手順でX線回折及びBET比表面積測定を行なった。
本実施例では、実施例1と同様の手順で作製した表1に示す組成(Al,B,Fe,Cu,Mg,Zn,GaあるいはSiで遷移金属を置換)の正極材料(4)〜(11)を、実施例1と同様の手順でX線回折及びBET比表面積測定を行なった。なお、置換を行う元素の原料には酸化物を用い、他の酸化物原料とともに遊星ボールミルで混合した。
本比較例では、実施例1と同様の手順で化学式がLi1.02Mn0.40Ni0.55Co0.05O2となるように比較正極材料(3)を作製し、実施例1と同様の手順でX線回折及びBET比表面積測定を行なった。X線回折で、(012)面の回折ピーク強度I012と(006)面の回折ピーク強度I006との合計強度の、(101)面の回折ピーク強度I101に対する強度比R2を算出したところ、R2は0.45であった。さらに、この比較正極材料(3)を用いて実施例1と同様に試験電池を作製し、-30℃で電池の内部抵抗を測定したが、抵抗は230Ω以上であった。
実施例1の正極材料(1)を用い、正極板の空隙率を9%から36%となるように電極密度を調整した。この正極板を用いた試験電池を作製し、-30℃における電池内部抵抗を測定した。空隙率が9%及び36%の正極板を用いたときの内部抵抗は,空隙率が12〜24%の正極板と比較して、それぞれ1.2倍及び1.4倍となった。
実施例1の正極材料(1)を用いた電池(1)の容量を測定した。充電条件は充電電流200mAで充電終止電圧4.2Vまで定電流充電後4.2Vの定電圧で計8時間の充電を行う定電流定電圧充電とした。放電は放電電流200mAで放電終止電圧2.5Vの定電流放電とした。次に、この電池容量の充電状態を50%とし、開回路電圧が3.5V〜4.0Vのときに-30℃での電池内部抵抗を測定した。開回路電圧が3.6〜3.9Vのときに電池内部抵抗を低下させることができた。一方、正極板の正極活物質量及び負極板の負極活物質を調整して電池の充電状態を90%としたときは、開回路電圧が3.8〜4.1Vのときに電池内部抵抗が低下した。
図6は実施例4に記載のリチウム二次電池を用いた電気自動車の駆動システム構成を示す図である。
Claims (11)
- 非水系リチウムイオン二次電池用正極材料であって、前記正極材料は化学式LiaMnxNiyCozO2 (0<a≦1.2、0.1≦x≦0.9、0≦y≦0.44、0.1≦z≦0.6、x+y+z=1) で表される層状構造を有する複合酸化物であり、X線源にCu−Kα線を用いたX線粉末回折測定における(003)面と(104)面の回折ピーク強度比 (I(003) /I(104)) が1.2以上1.4以下であることを特徴とするリチウム二次電池用正極材料。
- 非水系リチウムイオン二次電池用正極材料であって、前記正極材料は化学式LiaMnxNiyCozMαO2 (MはNi2+よりもイオン半径が小さい金属元素;0<a≦1.2、0.1≦x≦0.9、0≦y≦0.44、0.1≦z≦0.6、0.01≦α≦0.1、x+y+z+α=1) で表される層状構造を有する複合酸化物であり、X線源にCu−Kα線を用いたX線粉末回折測定における(003)面と(104)面の回折ピーク強度比(I(003) /I(104))が1.2以上1.4以下であることを特徴とするリチウム二次電池用正極材料。
- 請求項2に記載のリチウム二次電池用正極材料において、前記化学式中のMは、Al、B、Fe、Cu、Mg、Zn、Ga、Siから選ばれた少なくとも1種であることを特徴とするリチウム二次電池用正極材料。
- 請求項1に記載のリチウム二次電池用正極材料において、比表面積が0.6〜1.5m2/gであること特徴とするリチウム二次電池用正極材料。
- 請求項2に記載のリチウム二次電池用正極材料において、比表面積が0.6〜1.5m2/gであること特徴とするリチウム二次電池用正極材料。
- 請求項1に記載のリチウム二次電池用正極材料の少なくとも一つを含有し、前記正極材料と黒鉛及び/または非晶質炭素粉末からなる導電材と、該導電材及び該正極材料を結合する結着材からなる電極合材を、集電体上に塗布された正極板であって、該正極板の合材重量当りの空隙率が10〜35wt%であることを特徴とする正極板。
- 請求項2に記載のリチウム二次電池用正極材料の少なくとも一つを含有し、前記正極材料と黒鉛及び/または非晶質炭素粉末からなる導電材と、該導電材及び該正極材料を結合する結着材からなる電極合材を、集電体上に塗布された正極板であって、該正極板の合材重量当りの空隙率が10〜35wt%であることを特徴とする正極板。
- 請求項6に記載の正極板を用い、負極及び前記正極と負極は多孔質フィルムを介して配置された非水リチウム二次電池であって、該負極は非晶質炭素で構成された負極であり、前記電池充電状態が50%のときの開回路電圧が3.6〜3.9Vであることを特徴とするリチウム二次電池。
- 請求項7に記載の正極板を用い、負極及び前記正極と負極は多孔質フィルムを介して配置された非水リチウム二次電池であって、該負極は非晶質炭素で構成された負極であり、前記電池充電状態が50%のときの開回路電圧が3.6〜3.9Vであることを特徴とするリチウム二次電池。
- 請求項8に記載のリチウム二次電池を電源に用いたことを特徴とする電気機器。
- 請求項9に記載のリチウム二次電池を電源に用いたことを特徴とする電気機器。
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CN113394392A (zh) | 2014-12-23 | 2021-09-14 | 昆腾斯科普电池公司 | 富锂镍锰钴氧化物(lr-nmc) |
CN109075335B (zh) * | 2016-02-03 | 2022-01-07 | 住友化学株式会社 | 正极活性物质、锂离子二次电池用正极及锂离子二次电池 |
JP6862727B2 (ja) | 2016-09-13 | 2021-04-21 | 住友金属鉱山株式会社 | 非水系電解質二次電池用正極活物質とその製造方法、および該正極活物質を用いた非水系電解質二次電池 |
KR20200061234A (ko) | 2018-11-23 | 2020-06-02 | 삼성전자주식회사 | 복합양극활물질, 그 제조방법, 이를 포함하는 양극 및 리튬전지 |
WO2020158957A1 (ja) * | 2019-01-29 | 2020-08-06 | パイオトレック株式会社 | 導電ポリマー無機固体電解質二次電池の製造法 |
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JPH11260416A (ja) * | 1998-03-11 | 1999-09-24 | Ngk Insulators Ltd | リチウム二次電池 |
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US6733925B2 (en) | 2000-02-08 | 2004-05-11 | Shin-Kobe Electric Machinery Co., Ltd. | Non-aqueous electrolytic solution secondary battery with electrodes having a specific thickness and porosity |
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JP5034136B2 (ja) | 2000-11-14 | 2012-09-26 | 株式会社Gsユアサ | 非水電解質二次電池用正極活物質およびそれを用いた非水電解質二次電池 |
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KR100632979B1 (ko) | 2000-11-16 | 2006-10-11 | 히다치 막셀 가부시키가이샤 | 리튬 함유 복합 산화물 및 이것을 이용한 비수 2차 전지,및 그 제조 방법 |
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US7517613B2 (en) | 2009-04-14 |
CN1322612C (zh) | 2007-06-20 |
JP2005197004A (ja) | 2005-07-21 |
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