JPS62222569A - Lithium battery - Google Patents
Lithium batteryInfo
- Publication number
- JPS62222569A JPS62222569A JP6377186A JP6377186A JPS62222569A JP S62222569 A JPS62222569 A JP S62222569A JP 6377186 A JP6377186 A JP 6377186A JP 6377186 A JP6377186 A JP 6377186A JP S62222569 A JPS62222569 A JP S62222569A
- Authority
- JP
- Japan
- Prior art keywords
- active material
- electrolyte
- positive electrode
- binder
- positive active
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims description 14
- 229910052744 lithium Inorganic materials 0.000 title claims description 14
- 239000007774 positive electrode material Substances 0.000 claims abstract description 31
- 239000011230 binding agent Substances 0.000 claims abstract description 16
- 229920000642 polymer Polymers 0.000 claims abstract description 5
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 10
- 229920002554 vinyl polymer Polymers 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 3
- 229920002239 polyacrylonitrile Polymers 0.000 claims description 3
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 claims description 2
- 239000002033 PVDF binder Substances 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims description 2
- 239000000178 monomer Substances 0.000 claims description 2
- 229920002432 poly(vinyl methyl ether) polymer Polymers 0.000 claims description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 2
- 229920003214 poly(methacrylonitrile) Polymers 0.000 claims 1
- 239000003792 electrolyte Substances 0.000 abstract description 20
- 239000002245 particle Substances 0.000 abstract description 11
- 239000003960 organic solvent Substances 0.000 abstract description 8
- 230000010287 polarization Effects 0.000 abstract description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 abstract description 3
- 229910001416 lithium ion Inorganic materials 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract 1
- -1 polytetrafluoroethylene Polymers 0.000 description 10
- 239000000843 powder Substances 0.000 description 10
- 239000008151 electrolyte solution Substances 0.000 description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 7
- 239000004810 polytetrafluoroethylene Substances 0.000 description 7
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 239000002861 polymer material Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 4
- 239000004926 polymethyl methacrylate Substances 0.000 description 4
- 229910000733 Li alloy Inorganic materials 0.000 description 3
- 229910001290 LiPF6 Inorganic materials 0.000 description 3
- 239000001989 lithium alloy Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- 239000005486 organic electrolyte Substances 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- CFJRPNFOLVDFMJ-UHFFFAOYSA-N titanium disulfide Chemical compound S=[Ti]=S CFJRPNFOLVDFMJ-UHFFFAOYSA-N 0.000 description 3
- SBUOHGKIOVRDKY-UHFFFAOYSA-N 4-methyl-1,3-dioxolane Chemical compound CC1COCO1 SBUOHGKIOVRDKY-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
- GNOIPBMMFNIUFM-UHFFFAOYSA-N hexamethylphosphoric triamide Chemical compound CN(C)P(=O)(N(C)C)N(C)C GNOIPBMMFNIUFM-UHFFFAOYSA-N 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 2
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- RCYJPSGNXVLIBO-UHFFFAOYSA-N sulfanylidenetitanium Chemical compound [S].[Ti] RCYJPSGNXVLIBO-UHFFFAOYSA-N 0.000 description 2
- WNXJIVFYUVYPPR-UHFFFAOYSA-N 1,3-dioxolane Chemical compound C1COCO1 WNXJIVFYUVYPPR-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920002319 Poly(methyl acrylate) Polymers 0.000 description 1
- JFBZPFYRPYOZCQ-UHFFFAOYSA-N [Li].[Al] Chemical compound [Li].[Al] JFBZPFYRPYOZCQ-UHFFFAOYSA-N 0.000 description 1
- QUEDYRXQWSDKKG-UHFFFAOYSA-M [O-2].[O-2].[V+5].[OH-] Chemical compound [O-2].[O-2].[V+5].[OH-] QUEDYRXQWSDKKG-UHFFFAOYSA-M 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- WCQOLGZNMNEYDX-UHFFFAOYSA-N bis(selanylidene)vanadium Chemical compound [Se]=[V]=[Se] WCQOLGZNMNEYDX-UHFFFAOYSA-N 0.000 description 1
- VRSMQRZDMZDXAU-UHFFFAOYSA-N bis(sulfanylidene)niobium Chemical compound S=[Nb]=S VRSMQRZDMZDXAU-UHFFFAOYSA-N 0.000 description 1
- WVMYSOZCZHQCSG-UHFFFAOYSA-N bis(sulfanylidene)zirconium Chemical compound S=[Zr]=S WVMYSOZCZHQCSG-UHFFFAOYSA-N 0.000 description 1
- 239000002482 conductive additive Substances 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- LHJOPRPDWDXEIY-UHFFFAOYSA-N indium lithium Chemical compound [Li].[In] LHJOPRPDWDXEIY-UHFFFAOYSA-N 0.000 description 1
- JWZCKIBZGMIRSW-UHFFFAOYSA-N lead lithium Chemical compound [Li].[Pb] JWZCKIBZGMIRSW-UHFFFAOYSA-N 0.000 description 1
- 229910001540 lithium hexafluoroarsenate(V) Inorganic materials 0.000 description 1
- GCICAPWZNUIIDV-UHFFFAOYSA-N lithium magnesium Chemical compound [Li].[Mg] GCICAPWZNUIIDV-UHFFFAOYSA-N 0.000 description 1
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 description 1
- KUJOABUXCGVGIY-UHFFFAOYSA-N lithium zinc Chemical compound [Li].[Zn] KUJOABUXCGVGIY-UHFFFAOYSA-N 0.000 description 1
- 150000002734 metacrylic acid derivatives Chemical class 0.000 description 1
- TVWWSIKTCILRBF-UHFFFAOYSA-N molybdenum trisulfide Chemical compound S=[Mo](=S)=S TVWWSIKTCILRBF-UHFFFAOYSA-N 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920001485 poly(butyl acrylate) polymer Polymers 0.000 description 1
- 229920001490 poly(butyl methacrylate) polymer Polymers 0.000 description 1
- 229920001483 poly(ethyl methacrylate) polymer Polymers 0.000 description 1
- 229920000120 polyethyl acrylate Polymers 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 239000003017 thermal stabilizer Substances 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
- 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
- H01M4/621—Binders
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M6/00—Primary cells; Manufacture thereof
- H01M6/14—Cells with non-aqueous electrolyte
- H01M6/16—Cells with non-aqueous electrolyte with organic electrolyte
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はリチウム電池に係り、さらに詳しくはその正極
の改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to lithium batteries, and more particularly to improvements in positive electrodes thereof.
従来、リチウム電池の正極には、正極活物質粉末に結着
剤としてポリテトラフルオロエチレン粉末を加えて加圧
成形するか、または正極活物質粉末に黒鉛などの導電助
剤と結着剤としてのポリテトラフルオロエチレン粉末と
を加えて加圧成形したものが用いられていたく例えば特
開昭５５−１４６８８０号公報）。Conventionally, the positive electrode of a lithium battery is made by adding polytetrafluoroethylene powder as a binder to the positive electrode active material powder and press-molding it, or by adding a conductive agent such as graphite to the positive electrode active material powder and a binder as a binder. Polytetrafluoroethylene powder is added and pressure-molded.
ところが、上記ポリテトラフルオロエチレンは有機電解
液とのなじみが悪く、しかも電気伝導性がないため、正
極活物質表面のポリテトラフルオロエチレンで覆われた
部分は、放電反応に利用されなくなり、その結果、電流
密度が高くなって、分極が大きくなり、正極の利用率が
低下するという問題があった。However, the polytetrafluoroethylene mentioned above has poor compatibility with organic electrolytes and has no electrical conductivity, so the part covered with polytetrafluoroethylene on the surface of the positive electrode active material is no longer used for the discharge reaction, and as a result, However, there was a problem in that the current density increased, polarization increased, and the utilization rate of the positive electrode decreased.
本発明は、正極材料の結着剤としてポリエチレンオキサ
イド、ポリメチルメタクリレート、ポリビニルホルマー
ルなどの親有機溶媒性の高分子材料を用いることによっ
て、正極活物質が電解液に広い面積で接触するようにし
、かつ、本来、有機電解液に対する濡れ性が悪い二硫化
チタンなどの正極活物質の電解液に対する濡れ性をも改
善して、電流密度を低くさせ、分極を小さくして、正極
の利用率を向上させたものである。The present invention uses an organosolophilic polymeric material such as polyethylene oxide, polymethyl methacrylate, or polyvinyl formal as a binder for the positive electrode material so that the positive electrode active material comes into contact with the electrolyte over a wide area, In addition, it improves the wettability of positive electrode active materials such as titanium disulfide, which originally have poor wettability with organic electrolytes, to lower current density, reduce polarization, and improve the utilization rate of the positive electrode. This is what I did.
すなわち、正極活物質の結着剤として前記ポリエチレン
オキサイドなどの親有機溶媒性の高分子材料を用いると
、それら親有機溶媒性の高分子材料は、電解液中に熔解
して、正極活物質の粒子表面に高粘性の膜を形成し、正
極活物質粒子の離散を防止して結着剤として働くが、そ
れと共に、上記高粘性膜は電解液を含んでいてリチウム
イオンを伝導するので、ポリテトラフルオロエチレンの
ように放電反応を阻害することがなく、正極活物質粒子
の表面が広い面積で′２を留液に接触するようになる。That is, when an organosolophilic polymeric material such as polyethylene oxide is used as a binder for the positive electrode active material, the organosolophilic polymeric material dissolves in the electrolytic solution and binds the positive electrode active material. A highly viscous film is formed on the particle surface and acts as a binder to prevent the particles of the positive electrode active material from becoming dispersed.At the same time, the highly viscous film contains an electrolyte and conducts lithium ions. Unlike tetrafluoroethylene, it does not inhibit the discharge reaction, and the surface of the positive electrode active material particles comes into contact with the distillate over a wide area.
また、本来、電解液に対するなじみが悪い正極活物質の
粒子表面が常に電解液を含んだ高粘性膜と接することに
なるので、正極活物質の電解液に対する濡れ性も改善さ
れる。その結果、電流が分散され、電流密度が低下して
、分極が小さくなり、正極の利用率が向上する。In addition, since the particle surface of the positive electrode active material, which originally has poor affinity with the electrolytic solution, is always in contact with the highly viscous film containing the electrolytic solution, the wettability of the positive electrode active material with the electrolytic solution is also improved. As a result, the current is dispersed, the current density is reduced, the polarization is reduced, and the utilization rate of the positive electrode is improved.
本発明において結着剤として用いる高分子材料としては
、例えばポリエチレンオキサイド、ポリメチルメタクリ
レート、ポリエチルメタクリレート、ポリプロピルメタ
クリレート、ポリブチルメタクリレートなどのポリアル
キルメタクリレート、ポリメチルアクリレート、ポリエ
チルアクリレート、ポリプロピルアクリレート、ポリブ
チルアクリレートなどのポリアルキルアクリレート、ポ
リビニリデンフルオライド、ポリビニルメチルエーテル
、ポリビニルホルマール、ポリアクリロニトリル、ポリ
アクリロニトリルや、それらのポリマーを構成するモノ
マーの２種以上の共重合体などが用いられる。そして、
分子量的には平均分子量で２，０００〜２００．０００
程度のものが好用される。Examples of the polymeric material used as a binder in the present invention include polyalkyl methacrylates such as polyethylene oxide, polymethyl methacrylate, polyethyl methacrylate, polypropyl methacrylate, and polybutyl methacrylate, polymethyl acrylate, polyethyl acrylate, and polypropyl acrylate. , polyalkyl acrylate such as polybutyl acrylate, polyvinylidene fluoride, polyvinyl methyl ether, polyvinyl formal, polyacrylonitrile, polyacrylonitrile, and copolymers of two or more types of monomers constituting these polymers. and,
In terms of molecular weight, the average molecular weight is 2,000 to 200,000.
A moderate amount is preferred.
これらの高分子材料は、いずれも有機溶媒に可溶、つま
り、有機溶媒を用いた電解液に可溶であって、従来使用
のポリテトラフルオロエチレンとは異なり、電解液中で
溶解して高粘性膜として正極活物質の粒子表面近傍に存
在し、正極活物質の離散を防止して結着剤として働き、
かつ上記高粘性膜が電解液を含んでいて、正極活物質の
粒子表面へのリチウムイオン伝導層として（動り。All of these polymeric materials are soluble in organic solvents, that is, they are soluble in electrolytes using organic solvents, and unlike conventionally used polytetrafluoroethylene, they dissolve in electrolytes and produce high It exists as a viscous film near the particle surface of the positive electrode active material, prevents the positive electrode active material from dispersing, and acts as a binder.
In addition, the high viscosity film contains an electrolytic solution and acts as a lithium ion conductive layer on the particle surface of the positive electrode active material (movement).
上記高分子材料の使用量としては、導電助剤を添加する
か否かによって若干異なるが、通常、正極活物質１００
重量部に対して５〜２０重量部にするのが好ましい。The amount of the above-mentioned polymer material used varies slightly depending on whether or not a conductive additive is added, but it is usually 100% of the positive electrode active material.
It is preferable to use 5 to 20 parts by weight.
そして、上記高分子材料を正極活物質粉末と混合するに
あたっては、上記高分子材料を有機溶媒、とりわけ電解
液の溶媒として使用される有機溶媒または電解液に熔解
させておいてから、正極活物質粉末と混合する方が、高
分子材料の正極活物質中への分散が良くなるので好まし
い。When mixing the polymeric material with the positive electrode active material powder, the polymeric material is dissolved in an organic solvent, especially an organic solvent used as a solvent for the electrolytic solution or an electrolytic solution, and then the positive electrode active material is mixed with the positive electrode active material powder. It is preferable to mix it with powder because the polymer material can be better dispersed in the positive electrode active material.
上記高分子材料で結着される正極活物質は、特に限定さ
れるものではなく、リチウム電池の正極活物質として通
常用いられるものがすべて使用することができる。これ
を例示すると、二硫化チタン（ＴｉＳ２）、二硫化モリ
ブデン（ＭＯ３２）、三硫化モリブデンＣＭＯ３３）、
硫化ジルコニウム（ＺｒＳ２）、二硫化ニオブ（Ｎ ｂ
Ｓ２ ）、三硫化リンニッケル（ＮｉＰＳ３）、バナ
ジウムセレナイド（ＶＳｅ２）、五酸化バナジウム（Ｖ
２Ｏ３）、十三酸化バナジウム（Ｖ１５０１３）などで
ある。The positive electrode active material bound by the polymer material is not particularly limited, and any material commonly used as a positive electrode active material for lithium batteries can be used. Examples of this include titanium disulfide (TiS2), molybdenum disulfide (MO32), molybdenum trisulfide CMO33),
Zirconium sulfide (ZrS2), niobium disulfide (N b
S2 ), nickel phosphorous trisulfide (NiPS3), vanadium selenide (VSe2), vanadium pentoxide (V
2O3), vanadium trioxide (V15013), etc.
本発明の電池において、負極にはリチウムまたはリチウ
ム合金が用いられる。リチウム合金としては、例えばリ
チウム−アルミニウム、リチウム−鉛、リチウム−ガリ
ウム、リチウム−インジウム、リチウム−ガリウム−イ
ンジウム、リチウム−マグネシウム、リチウム−亜鉛な
どのリチウム合金があげられる。In the battery of the present invention, lithium or a lithium alloy is used for the negative electrode. Examples of lithium alloys include lithium alloys such as lithium-aluminum, lithium-lead, lithium-gallium, lithium-indium, lithium-gallium-indium, lithium-magnesium, and lithium-zinc.
電解液には、例えばプロピレンカーボネート、Ｔ−ブチ
ロラクトン、テトラヒドロフラン、１．２−ジメトキシ
エタン、１．２−ジェトキシエタン、１．３−ジオキソ
ラン、４−メチル−１，３−ジオキソランなどの有機溶
媒の単独もしくは２種以上の混合溶媒を電解液溶媒とし
、これにＬｉＣＩＯ４、ＬｉＰＦ６、ＬｉＡｓＦ６、Ｌ
ｉ５ｂＦｓ、ＬｉＢＦ４、ＬｉＢ（ＣｓＨｃ、）４など
の電解質の１種または２種以上を熔解したものが用いら
れる。またＬｉＰＦ６などの電解質の熱安定性を高める
ために、ヘキサメチルホスホリックトリアミドなどの熱
安定化剤を添加することも好ましく採用される。The electrolyte may contain organic solvents such as propylene carbonate, T-butyrolactone, tetrahydrofuran, 1,2-dimethoxyethane, 1,2-jethoxyethane, 1,3-dioxolane, 4-methyl-1,3-dioxolane, etc. alone or A mixed solvent of two or more types is used as an electrolyte solvent, and LiCIO4, LiPF6, LiAsF6, L
A solution of one or more electrolytes such as i5bFs, LiBF4, and LiB(CsHc, )4 is used. Further, in order to improve the thermal stability of the electrolyte such as LiPF6, it is also preferably employed to add a thermal stabilizer such as hexamethylphosphoric triamide.
つぎに実施例をあげて本発明をさらに詳細に説明する。 Next, the present invention will be explained in more detail with reference to Examples.
実施例に
硫化チタン粉末５０重量部を、平均分子量２０．０００
のポリエチレンオキサイド１０重量部を１．２−ジメト
キシエタン３０重量部に溶解した溶液と混合した後、１
１ｍＡｈ相当量秤取して金型に充填し、１００ｋｇ／−
で加圧成形して直径７．０ｍｍ、厚さ０．５１の正極を
作製した。この正極と、負極にはリチウムを用い、電解
液には４−メチル−１，３−ジオキソランと１．２−ジ
メトキシエタンとへキサメチルホスホリックトリアミド
の容量比６０：３５：５の混合溶媒にＬｉＰＦ６を１ｍ
ｏｌ／ｊ！溶解した有機電解液を用いて、第１図に示す
構造のリチウム電池を作製した。In the example, 50 parts by weight of titanium sulfide powder was used, and the average molecular weight was 20.000.
After mixing 10 parts by weight of polyethylene oxide in 30 parts by weight of 1,2-dimethoxyethane, 1
Weigh out an amount equivalent to 1mAh and fill it into a mold, 100kg/-
A positive electrode having a diameter of 7.0 mm and a thickness of 0.5 mm was produced by pressure molding. Lithium was used for the positive and negative electrodes, and the electrolyte was a mixed solvent of 4-methyl-1,3-dioxolane, 1,2-dimethoxyethane, and hexamethylphosphoric triamide in a volume ratio of 60:35:5. 1m of LiPF6
ol/j! A lithium battery having the structure shown in FIG. 1 was produced using the dissolved organic electrolyte.
第１図において、１は負極であり、この負極１は前述の
ようにリチウムからなる。２は前述のようにポリエチレ
ンオキサイドを結着剤として用いて作製した正極であり
、３は前述の電解液である。４は微孔性ポリプロピレン
フィルムからなるセパレータで、５はポリプロピレン不
織布からなる電解液吸収体である。７はステンレス鋼製
で外面にニッケルメッキを施した負極缶で、８はステン
レス鋼製で外面にニッケルメッキを施した正極缶である
。９はステンレス鋼製網からなる負極側の集電体である
。In FIG. 1, 1 is a negative electrode, and this negative electrode 1 is made of lithium as described above. 2 is a positive electrode prepared using polyethylene oxide as a binder as described above, and 3 is the electrolytic solution described above. 4 is a separator made of a microporous polypropylene film, and 5 is an electrolyte absorber made of a polypropylene nonwoven fabric. 7 is a negative electrode can made of stainless steel with nickel plating on the outer surface, and 8 is a positive electrode can made of stainless steel with nickel plating on the outer surface. 9 is a current collector on the negative electrode side made of a stainless steel mesh.
実施例２
ポリエチレンオキサイドに代えて、平均分子量１０．０
００のポリビニルホルマールを用いたほかは、実施例１
と同様にして、第１図に示す構造のリチウム電池を作製
した。Example 2 Instead of polyethylene oxide, average molecular weight 10.0
Example 1 except that 00 polyvinyl formal was used.
In the same manner as above, a lithium battery having the structure shown in FIG. 1 was produced.
実施例３
ポリエチレンオキサイドに代えて、平均分子量２０ 、
０００のポリメチルメタクリレートを用いたほかは、実
施例１と同様にして、第１図に示す構造のリチウム電池
を作製した。Example 3 Instead of polyethylene oxide, average molecular weight 20,
A lithium battery having the structure shown in FIG. 1 was produced in the same manner as in Example 1 except that 000 polymethyl methacrylate was used.
比較例に
硫化チタン粉末５０重量部にポリテトラフルオロエチレ
ン粉末２．５重量部を加えて混合し、これを１１ｍＡｈ
相当量秤取して、金型に充填し、１００ｋｇ ／ ｃｄ
で加圧成形して直径７．０１１１１１． ＦＸさ０．５
ｍ−の正極を作製した。この正極を用いたほかは実施例
１と同様にして、第１図に示す構造のリチウム電池を作
製した。In a comparative example, 2.5 parts by weight of polytetrafluoroethylene powder was added to 50 parts by weight of titanium sulfide powder and mixed, and this was heated to 11 mAh.
Weigh the equivalent amount and fill it into a mold, 100kg/cd
Pressure molded with a diameter of 7.011111. FX 0.5
A positive electrode of m- was produced. A lithium battery having the structure shown in FIG. 1 was produced in the same manner as in Example 1 except that this positive electrode was used.
上記のようにして作製された実施例１〜３の電池および
比較例１の電池を２５℃、放電電流０．７６ｍＡ（正極
のみかけ表面積あたり２ｍＡ／ｃｊ）で放電した。その
結果を第２図に示す。The batteries of Examples 1 to 3 and the battery of Comparative Example 1 produced as described above were discharged at 25° C. with a discharge current of 0.76 mA (2 mA/cj per apparent surface area of the positive electrode). The results are shown in FIG.
第２図に示すように、実施例１〜３の電池は、ポリテト
ラフルオロエチレンを結着剤として用いた比較例１の電
池に比べて、放電容量がはるかに大きかった。これは、
実施例では、ポリエチレンオキサイドなどの親有機溶媒
性を有する高分子材料を結着剤として用いたことにより
、正極活物質の粒子表面の電解液への濡れ性が改善され
、放電反応に有効に利用される表面積が増加し、電流密
度が低下して、分極が小さくなり、正極の利用率が向上
したためであると考えられる。As shown in FIG. 2, the batteries of Examples 1 to 3 had much larger discharge capacities than the battery of Comparative Example 1, which used polytetrafluoroethylene as a binder. this is,
In the example, by using a polymer material with organosolophilic properties such as polyethylene oxide as a binder, the wettability of the particle surface of the positive electrode active material to the electrolyte was improved, and it was effectively used for the discharge reaction. This is thought to be due to the fact that the surface area covered by the positive electrode increased, the current density decreased, the polarization became smaller, and the utilization rate of the positive electrode improved.
以上説明したように、本発明では、ポリエチレンオキサ
イド、ポリビニルホールマール、ポリメチルメタクリレ
ートなどの現有ｔａ溶媒性の高分子材料を結着剤として
用いることにより、正極活物質が広い面積で電解液と接
触できるようにし、正極の利用率を向上させることがで
きた。As explained above, in the present invention, by using existing ta-solvent polymer materials such as polyethylene oxide, polyvinyl formal, and polymethyl methacrylate as a binder, the positive electrode active material can come into contact with the electrolyte over a wide area. We were able to improve the utilization rate of the positive electrode.
第１図は本発明に係るリチウム電池の一例を示す断面図
である。第２図は実施例１〜３の電池と比較例１の電池
の放電特性を示す図である。
１・・・負極、 ２・・・正極、 ３・・・電解液第
１ 層
Ｉ・・・重層
２・・・正極
端 ２ 圀
袂を容量（ｍＡｈ）FIG. 1 is a sectional view showing an example of a lithium battery according to the present invention. FIG. 2 is a diagram showing the discharge characteristics of the batteries of Examples 1 to 3 and the battery of Comparative Example 1. 1... Negative electrode, 2... Positive electrode, 3... Electrolyte No.
1 Layer I...Multilayer 2...Positive end 2 Capacity (mAh)
Claims (2)
る高分子材料を用いたことを特徴とするリチウム電池。(1) A lithium battery characterized in that a polymeric material having organophilic solvent properties is used as a binder for a positive electrode active material.
オキサイド、ポリアルキルメタクリレート、ポリアルキ
ルアクリレート、ポリビニリデンフルオライド、ポリビ
ニルメチルエーテル、ポリビニルホルマール、ポリアク
リロニトリル、ポリメタクリロニトリルまたはそれらの
ポリマーを構成するモノマーの２種以上の共重合体であ
る特許請求の範囲第１項記載のリチウム電池。(2) The polymeric material having organosolophilic properties constitutes polyethylene oxide, polyalkyl methacrylate, polyalkyl acrylate, polyvinylidene fluoride, polyvinyl methyl ether, polyvinyl formal, polyacrylonitrile, polymethacrylonitrile, or a polymer thereof. The lithium battery according to claim 1, which is a copolymer of two or more types of monomers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6377186A JPS62222569A (en) | 1986-03-20 | 1986-03-20 | Lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6377186A JPS62222569A (en) | 1986-03-20 | 1986-03-20 | Lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62222569A true JPS62222569A (en) | 1987-09-30 |
Family
ID=13238964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6377186A Pending JPS62222569A (en) | 1986-03-20 | 1986-03-20 | Lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62222569A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010287788A (en) * | 2009-06-12 | 2010-12-24 | Nichicon Corp | Oil-impregnated capacitor |
| JP2013175477A (en) * | 2013-05-08 | 2013-09-05 | Nissan Motor Co Ltd | Electrode for battery |
-
1986
- 1986-03-20 JP JP6377186A patent/JPS62222569A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010287788A (en) * | 2009-06-12 | 2010-12-24 | Nichicon Corp | Oil-impregnated capacitor |
| JP2013175477A (en) * | 2013-05-08 | 2013-09-05 | Nissan Motor Co Ltd | Electrode for battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH11191319A (en) | Hybrid polymer electrolyte, its production and lithium battery manufactured by use of this | |
| JPS63102173A (en) | Lithium secondary battery | |
| JP2002530838A (en) | Electrolyte with improved low temperature performance | |
| KR100467455B1 (en) | Positive active material composition for lithium sulfur battery and lithium sulfur battery fabricated using binder | |
| KR101956827B1 (en) | Negative electrode active material and lithium secondary battery comprising the same | |
| KR20180087169A (en) | Negative electrode for lithium secondary battery, lithium secondary battery comprising the same, and preparing method thereof | |
| JP2000021390A (en) | Lithium polymer secondary battery provided with positive electrode containing metal composite positive electrode material | |
| KR100467454B1 (en) | Positive active material composition for lithium sulfur battery and lithium sulfur battery fabricated using binder | |
| JPH08306354A (en) | Electrode and nonaqueous solvent type secondary battery using the electrode | |
| JPS63121258A (en) | Nonaqueous secondary battery | |
| KR100327915B1 (en) | Polymer electrolyte, method for preparing the same, and lithium secondary battery employing the same | |
| JP2005018998A (en) | Negative electrode material and battery using the same | |
| JP2002117832A (en) | Lithium secondary battery | |
| JPS62222569A (en) | Lithium battery | |
| JPS63314766A (en) | Organic electrolyte cell having activated carbon metal oxide composite as positive electrode | |
| JPH1154113A (en) | Manufacture of mix for electrode of nonaqueous secondary battery | |
| JPH08222206A (en) | Positive electrode for lithium secondary battery and lithium secondary battry | |
| KR20180111322A (en) | Preparing method for electrode for lithium secondary battery, electrode for lithium secondary battery, and lithium secondary battery comprising the same | |
| JP2000133245A (en) | Electrode for nonaqueous electrolyte secondary battery and nonaqueous electrolyte secondary battery using this as positive electrode | |
| JPH113706A (en) | Lithium secondary battery | |
| JPH10106546A (en) | Manufacture of electrode for battery | |
| JP3902349B2 (en) | Polymer electrolyte battery | |
| JP3526695B2 (en) | Positive electrode for non-aqueous electrolyte secondary battery and non-aqueous electrolyte secondary battery | |
| KR20040042749A (en) | Porous Polymer-Coated Gelling Separators and Electrochemical Cells Using the Same | |
| KR102054266B1 (en) | Active material separated type lithium-sulfur battery |