JP2012089470A - 非水電解質二次電池用正極活物質、非水電解質二次電池、電池パック及び非水電解質二次電池用正極活物質の製造方法 - Google Patents
非水電解質二次電池用正極活物質、非水電解質二次電池、電池パック及び非水電解質二次電池用正極活物質の製造方法 Download PDFInfo
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- 239000007774 positive electrode material Substances 0.000 title claims abstract description 39
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- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 4
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- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 description 1
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- UFMZWBIQTDUYBN-UHFFFAOYSA-N cobalt dinitrate Chemical compound [Co+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O UFMZWBIQTDUYBN-UHFFFAOYSA-N 0.000 description 1
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- MVFCKEFYUDZOCX-UHFFFAOYSA-N iron(2+);dinitrate Chemical compound [Fe+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MVFCKEFYUDZOCX-UHFFFAOYSA-N 0.000 description 1
- 239000011244 liquid electrolyte Substances 0.000 description 1
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- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 description 1
- ZAUUZASCMSWKGX-UHFFFAOYSA-N manganese nickel Chemical compound [Mn].[Ni] ZAUUZASCMSWKGX-UHFFFAOYSA-N 0.000 description 1
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
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- 238000000465 moulding Methods 0.000 description 1
- KBJMLQFLOWQJNF-UHFFFAOYSA-N nickel(ii) nitrate Chemical compound [Ni+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O KBJMLQFLOWQJNF-UHFFFAOYSA-N 0.000 description 1
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G45/00—Compounds of manganese
- C01G45/006—Compounds containing, besides manganese, two or more other elements, with the exception of oxygen or hydrogen
-
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- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G51/00—Compounds of cobalt
- C01G51/006—Compounds containing, besides cobalt, two or more other elements, with the exception of oxygen or hydrogen
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G53/00—Compounds of nickel
- C01G53/006—Compounds containing, besides nickel, two or more other elements, with the exception of oxygen or hydrogen
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
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- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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- H01M10/486—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for measuring temperature
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- 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
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- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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- 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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- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
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- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/581—Devices or arrangements for the interruption of current in response to temperature
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- Microelectronics & Electronic Packaging (AREA)
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Abstract
Description
前記一般式中のa、b、c、d、e及びxは、0<a≦0.33、0<b≦0.67、0≦c<1、0≦d<1、0≦e<1、0.1<x≦1−bの値であり、
下式(1)を満たす非水電解質二次電池用正極活物質が提供される。
第1実施形態における正極活物質は、一般式 Li(LiaMnbNicCodFee)O2−xFxで表される非水電解質二次電池用正極活物質であって、
前記一般式中のa、b、c、d、e及びxは、0<a≦0.33、0<b≦0.67、0≦c<1、0≦d<1、0≦e<1、0.1≦x≦1−bの値であり、
下式(1)を満たすことを特徴とする。
第2実施形態における正極活物質の製造方法について以下に説明する。
第3実施形態に係る非水電解質二次電池を説明する。
外装材2は、厚さ0.5mm以下のラミネートフィルムから形成される。或いは、外装材は厚さ1.0mm以下の金属製容器が用いられる。金属製容器は、厚さ0.5mm以下であることがより好ましい。
負極3は、集電体3aと、この集電体3aの片面または両面に形成され、活物質、導電剤及び結着剤を含む負極層3bとを備える。
正極5は、集電体5aと、この集電体5aの片面または両面に形成され、活物質、導電剤及び結着剤を含む正極層5bとを備える。
非水電解質は、例えば電解質を有機溶媒に溶解することにより調製される液状非水電解質、または液状電解質と高分子材料を複合化したゲル状非水電解質を用いることができる。
セパレータ4は、例えばポリエチレン、ポリプロピレン、セルロース、もしくはポリフッ化ビニリデン(PVdF)を含む多孔質フィルム、または合成樹脂製不織布を用いることができる。好ましい多孔質フィルムは、ポリエチレンまたはポリプロピレンから作られ、一定温度において溶融し、電流を遮断することが可能であるために安全性を向上できる。
次に、実施形態に係る電池パックを詳細に説明する。
前記一般式において、a=0.2、b=0.6、c=0.2、d=e=0、x=0.2とした、Li1.2Ni0.2Mn0.6O1.8F0.2を正極活物質として合成した。このとき、前記式(1)の値は、3.67となる。この正極活物質88質量%を、導電材としてアセチレンブラック6重量%、ポリフッ化ビニリデン(PVdF)6重量%をN−メチルピロリドン(NMP)に加えて混合してスラリーを調整した。このスラリーを厚さ15μmのアルミニウム箔からなる集電体に両面に塗布した後、乾燥し、プレスすることにより試験用電極を作製した。
他の実施例として、表1に記載した正極活物質を合成した。実施例1と出発材料の組成を変更した以外は、電極作製方法、評価方法は実施例1と同じである。
比較例として、フッ素を含有しない正極活物質Li1.2Ni0.2Mn0.6O2を合成した(x=0)。その他の電極作製方法、評価方法は実施例1と同様である。
前記一般式において、a=0.2、b=0.5、c=0.3、d=e=0、x=0.05とした、Li1.2Ni0.3Mn0.5O1.8F0.2を合成した。その他の電極作製方法、評価方法は実施例1と同様である。
前記一般式において、a=0.2、b=0.55、c=0.25、d=e=0、x=0.1とした、Li1.2Ni0.25Mn0.55O1.8F0.2を合成した。このとき、前記式(1)の値は4となる。その他の電極作製方法、評価方法は実施例1と同様である。
Claims (8)
- 少なくとも遷移金属水酸化物と、水酸化リチウムと、フッ化アンモニウムとを混合し、
700℃以上1000℃以下の温度で5時間以上48時間以下の時間焼成することを特徴とする、正極活物質の製造方法。 - 前記遷移金属水酸化物が共沈法によって合成されることを特徴とする、請求項7に記載の非水電解質二次電池用正極活物質の製造方法。
- 請求項2又は3に記載の製造方法によって製造された非水電解質二次電池用正極活物質。
- 請求項1又は4に記載の正極活物質を含む正極と、
負極活物質を含む負極と、
非水電解質と、
を具備することを特徴とする非水電解質二次電池。 - ラミネートフィルム製の外装材をさらに備えることを特徴とする、請求項5に記載の非水電解質二次電池。
- 請求項6に記載の非水電解質二次電池を一以上備えることを特徴とする電池パック。
- 電気的に接続された複数の前記非水電解質電池を具備し、各非水電解質電池の電圧が検知可能な保護回路をさらに備えることを特徴とする、請求項7に記載の電池パック。
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