JPH0576744B2 - - Google Patents
Info
- Publication number
- JPH0576744B2 JPH0576744B2 JP59080517A JP8051784A JPH0576744B2 JP H0576744 B2 JPH0576744 B2 JP H0576744B2 JP 59080517 A JP59080517 A JP 59080517A JP 8051784 A JP8051784 A JP 8051784A JP H0576744 B2 JPH0576744 B2 JP H0576744B2
- Authority
- JP
- Japan
- Prior art keywords
- active material
- electrode active
- negative electrode
- battery
- manganese dioxide
- 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.)
- Expired - Lifetime
Links
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 42
- 239000007773 negative electrode material Substances 0.000 claims description 19
- 239000007774 positive electrode material Substances 0.000 claims description 11
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 7
- 229910052744 lithium Inorganic materials 0.000 claims description 7
- 239000011255 nonaqueous electrolyte Substances 0.000 claims description 5
- 239000012266 salt solution Substances 0.000 claims description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 3
- 229910052708 sodium Inorganic materials 0.000 claims description 3
- 239000011734 sodium Substances 0.000 claims description 3
- 239000011149 active material Substances 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 239000011572 manganese Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- FBDMJGHBCPNRGF-UHFFFAOYSA-M [OH-].[Li+].[O-2].[Mn+2] Chemical compound [OH-].[Li+].[O-2].[Mn+2] FBDMJGHBCPNRGF-UHFFFAOYSA-M 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 1
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- BAZAXWOYCMUHIX-UHFFFAOYSA-M sodium perchlorate Chemical compound [Na+].[O-]Cl(=O)(=O)=O BAZAXWOYCMUHIX-UHFFFAOYSA-M 0.000 description 1
- 229910001488 sodium perchlorate Inorganic materials 0.000 description 1
- 239000007790 solid phase 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
- H01M4/36—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
-
- 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)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Electrode And Active Subsutance (AREA)
Description
【発明の詳細な説明】
(イ) 産業上の利用分野
本発明はリチウム、ナトリウムなどの軽金属を
負極活物質とし、非水電解液を用いる非水電解液
電池に係り、特に正極活物質の改良に関するもの
である。[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a non-aqueous electrolyte battery using a light metal such as lithium or sodium as a negative electrode active material and a non-aqueous electrolyte, and in particular to improvement of the positive electrode active material. It is related to.
(ロ) 従来技術
この種電池の正極活物質としては金属の酸化
物、ハロゲン化物など種々のものが提案されてい
るが、その中でも例えば特公昭57−4064号公報に
開示されている二酸化マンガンは資源的に豊富で
あり、且安価であることから有望視されている。(b) Prior art Various materials such as metal oxides and halides have been proposed as positive electrode active materials for this type of battery, but among them, for example, manganese dioxide disclosed in Japanese Patent Publication No. 1983-4064 is It is considered promising because it is an abundant resource and inexpensive.
ここで、例えば二酸化マンガン−リチウム系の
電池を例にとるとその反応式は次の如く提唱され
ている（社団法人、電気化学協会電池技術委員会
発行の電池技術委員会30周年記念、「電池技術」
の第58頁乃至第59頁参照）。 For example, if we take a manganese dioxide-lithium battery as an example, its reaction formula is proposed as follows (Battery Technology Committee 30th Anniversary, published by the Electrochemical Society Battery Technology Committee, an incorporated association). "Technology"
(See pages 58-59).
Mn(〓)O2＋Li→Mn(〓)O2（Li+）
即ち、Li+イオンがMnO2の結晶格子中に固相
拡散により侵入し、４価のMnを３価に還元する
反応である。 Mn ( 〓 ) O 2 +Li→Mn ( 〓 ) O 2 (Li + ) In other words, Li + ions enter the crystal lattice of MnO 2 by solid phase diffusion, and this is a reaction that reduces tetravalent Mn to trivalent Mn. be.
(ハ) 発明の目的
本発明の目的とするところは正極活物質として
の二酸化マンガンを改良してこの種電池の特性向
上を計ることにある。(c) Object of the invention The object of the invention is to improve the characteristics of this type of battery by improving manganese dioxide as a positive electrode active material.
(ニ) 発明の構成
本発明は上記目的を達成すべくなされたものに
してその要旨とするところは、負極活物質の塩溶
液中でマイクロ波照射処理を施して負極活物質を
ドープした二酸化マンガンを正極活物質として用
いることを特徴とするものである。(d) Structure of the Invention The present invention has been made to achieve the above object, and its gist is to provide manganese dioxide doped with a negative electrode active material by subjecting it to microwave irradiation treatment in a salt solution of the negative electrode active material. is characterized in that it is used as a positive electrode active material.
本発明によれば正極活物質としての二酸化マン
ガンに負極活物質がドープされているため、放電
時、本来の負極の活物質に加えて、予じめドープ
されている負極活物質の正極中へ拡散することに
なり拡散量の増大によつて電池特性の向上が計れ
る。 According to the present invention, since the negative electrode active material is doped with manganese dioxide as the positive electrode active material, during discharge, in addition to the original negative electrode active material, the negative electrode active material that has been doped in advance enters the positive electrode. As a result, battery characteristics can be improved by increasing the amount of diffusion.
又、負極活物質を二酸化マンガンにドープする
に際して、二酸化マンガンを負極活物質の塩溶液
中でマイクロ波照射処理によつて行つているた
め、負極活物質が二酸化マンガン中の水分と置換
によつてドープすることになり、二酸化マンガン
中の除去し難い結合水の除去を計れるという付加
的な利点も奏する。 In addition, when doping manganese dioxide with the negative electrode active material, the manganese dioxide is subjected to microwave irradiation treatment in the salt solution of the negative electrode active material, so that the negative electrode active material replaces the water in the manganese dioxide. This has the additional advantage of being doped, allowing for the removal of bound water in manganese dioxide that is difficult to remove.
(ホ) 実施例
以下、本発明の実施例を負極活物質としてリチ
ウムを例にとり詳述する。(e) Examples Hereinafter, examples of the present invention will be described in detail using lithium as the negative electrode active material.
正極の作成：
電解二酸化マンガン40ｇを、１モル／の水酸
化リチウム溶液30c.c.を入れた容器中に浸漬し、つ
いで周波数約2.45GHzのマイクロ波を照射する。
溶液が蒸発した時点（約10分間）でマイクロ波の
照射を止め再度容器内に１モル／の水酸化リチ
ウム溶液を30c.c.入れマイクロ波を照射する。この
サイクルを７回行つた後、１の水で洗浄し、つ
いで350〜430℃の温度で熱処理して正極活物質と
しての二酸化マンガンを得る。斯る処理にて得ら
れた二酸化マンガンには負極活物質であるリチウ
ムがドープされている。Preparation of positive electrode: 40 g of electrolytic manganese dioxide is immersed in a container containing 30 c.c. of 1 mol/mol lithium hydroxide solution, and then irradiated with microwaves at a frequency of about 2.45 GHz.
When the solution evaporates (about 10 minutes), stop the microwave irradiation, and put 30 c.c. of 1 mol/mol lithium hydroxide solution into the container and irradiate it again with microwaves. After repeating this cycle seven times, it is washed with water (1) and then heat treated at a temperature of 350 to 430°C to obtain manganese dioxide as a positive electrode active material. The manganese dioxide obtained through such treatment is doped with lithium, which is a negative electrode active material.
次にこの処理済二酸化マンガン85重量部と、導
電剤としてのグラフアイト10重量部及び結着剤と
してのフツ素樹脂粉末５重量部を混合して正極合
剤とし、この合剤を成型圧５トン／cm2で直径20.0
mmφに加圧成型した後、更に250〜350℃の温度で
真空乾燥して正極とする。 Next, 85 parts by weight of this treated manganese dioxide, 10 parts by weight of graphite as a conductive agent, and 5 parts by weight of fluororesin powder as a binder were mixed to form a positive electrode mixture, and this mixture was molded under a molding pressure of 5 parts by weight. Diameter 20.0 in tons/ cm2
After pressure molding to mmφ, it is further vacuum dried at a temperature of 250 to 350°C to form a positive electrode.
電池の作成：
負極はリチウム圧延板を直径20.0mmφに打抜い
たものを用い、又電解液はプロピレンカーボネー
ト１，２ジメトキシエタンとの等体積混合溶媒に
過塩素酸リチウムを１モル／溶解したものであ
り、ポリプロピレン不織布よりなるセパレータに
含浸して用い、上記正極と組合せて外径25.0mm
φ、厚み2.8mmのボタン型非水電解液電池を作成
した。この電池をＡとする。Battery creation: The negative electrode was a lithium rolled plate punched out to a diameter of 20.0 mm, and the electrolyte was 1 mole of lithium perchlorate dissolved in an equal volume mixed solvent of propylene carbonate and 1,2 dimethoxyethane. It is used by impregnating a separator made of polypropylene nonwoven fabric, and when combined with the above positive electrode, the outer diameter is 25.0 mm.
A button-type non-aqueous electrolyte battery with a diameter of φ and a thickness of 2.8 mm was created. This battery is called A.
次に本発明電池の優位性を調べるために二種の
比較電池を作成した。 Next, two types of comparative batteries were prepared in order to investigate the superiority of the battery of the present invention.
比較例 １
本発明の実施例の正極の作成において水酸化リ
チウムに代えて蒸留水を用いることを除いて他は
本発明実施例と同様である。この比較電池をＢと
する。Comparative Example 1 The positive electrode of the example of the present invention was prepared in the same manner as the example of the present invention except that distilled water was used instead of lithium hydroxide. This comparison battery is designated as B.
比較例 ２
マイクロ波照射処理を行なわず、電解二酸化マ
ンガンを350〜430℃の温度で熱処理したものを正
極活物質とすることを除いて他は本発明実施例と
同様である。この比較電池をＣとする。Comparative Example 2 This is the same as the example of the present invention, except that the positive electrode active material is electrolytic manganese dioxide that has been heat-treated at a temperature of 350 to 430° C. without being subjected to microwave irradiation treatment. This comparison battery is designated as C.
図面はこれらの電池を25℃において560Ω定負
荷で放電した時の放電特性比較図を示す。 The figure shows a comparison diagram of the discharge characteristics when these batteries were discharged under a constant load of 560Ω at 25°C.
(ヘ) 発明の効果
図面より本発明電池によれば、比較電池に比し
て放電特性が改善されているのがわかる。(F) Effects of the Invention From the drawings, it can be seen that the battery of the present invention has improved discharge characteristics compared to the comparative battery.
この理由を考察するに、本発明電池Ａにおける
正極活物質としての二酸化マンガンは負極活物質
がドープされているため、放電時、本来の負極に
おける活物質に加えて上記の予じめドープされて
いる負極活物質がイオンとなつて正極中に拡散さ
れることになり拡散量が増大することに起因する
と考えられる。 Considering the reason for this, since the manganese dioxide as the positive electrode active material in the battery A of the present invention is doped with the negative electrode active material, during discharge, in addition to the original active material in the negative electrode, the manganese dioxide is This is thought to be due to the fact that the negative electrode active material contained in the ions becomes ions and is diffused into the positive electrode, resulting in an increase in the amount of diffusion.
又、図面より二種の比較電池Ｂ，Ｃにおいて、
比較電池Ｂの方が特に放電末期において優れた特
性を示すことが伺えるが、この理由は比較電池Ｂ
における正極活物質（二酸化マンガン）はマイク
ロ波照射処理されているため、この処理によつて
二酸化マンガン中の除去し難い結合水が除去し得
たため残存水分量が比較電池Ｃに比して減じられ
たことに起因すると考えられる。 Also, from the drawings, in two types of comparative batteries B and C,
It can be seen that comparative battery B shows superior characteristics especially at the end of discharge, but the reason for this is that comparative battery B
Since the positive electrode active material (manganese dioxide) was subjected to microwave irradiation treatment, the bound water in the manganese dioxide, which is difficult to remove, was removed by this treatment, so the residual water content was reduced compared to Comparative Battery C. This is thought to be due to this.
従つて、本発明電池における正極活物質として
の二酸化マンガンのように負極活物質をドープす
るに際し、負極活物質の塩溶液中でマイクロ波照
射処理によつて行えば、二酸化マンガン中の除去
し難い結合水の除去が計れ残存水分量を減じるこ
とができるという利点も備えるため極めて有益で
ある。 Therefore, when doping a negative electrode active material such as manganese dioxide as a positive electrode active material in the battery of the present invention, it is difficult to remove the manganese dioxide from the manganese dioxide if it is carried out by microwave irradiation treatment in a salt solution of the negative electrode active material. It is extremely useful because it also has the advantage of being able to remove bound water and reduce the amount of residual water.
尚、本発明を開示するに際して、負極活物質と
してリチウムの場合を例示したが、リチウムに限
定されずナトリウムの場合も適用でき、その際に
は負極活物質の塩溶液として例えば水酸化ナトリ
ウムを用いれば良く、又電池用電解液を構成する
溶質として過塩素酸ナトリウムを用いれば良い。 In disclosing the present invention, the case of using lithium as the negative electrode active material has been illustrated, but it is not limited to lithium and can also be applied to the case of sodium. In this case, for example, sodium hydroxide may be used as the salt solution of the negative electrode active material. Alternatively, sodium perchlorate may be used as the solute constituting the battery electrolyte.
図面は本発明電池と比較電池との放電特性比較
図である。
Ａ……本発明電池。Ｂ，Ｃ……比較電池。
The drawing is a comparison diagram of discharge characteristics between a battery of the present invention and a comparative battery. A...Battery of the present invention. B, C... Comparison batteries.
Claims (1)
を活物質とする負極と、非水電解液とを備えるも
のであつて、正極活物質として前記負極活物質の
塩溶液中でマイクロ波照射処理を施して負極活物
質をドープした二酸化マンガンを用いることを特
徴とする非水電解液電池。1 A device comprising a positive electrode, a negative electrode using a light metal such as lithium or sodium as an active material, and a non-aqueous electrolyte, which is subjected to microwave irradiation treatment in a salt solution of the negative electrode active material as the positive electrode active material. A nonaqueous electrolyte battery characterized by using manganese dioxide doped with a negative electrode active material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59080517A JPS60225358A (en) | 1984-04-20 | 1984-04-20 | Nonaqueous electrolyte battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59080517A JPS60225358A (en) | 1984-04-20 | 1984-04-20 | Nonaqueous electrolyte battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60225358A JPS60225358A (en) | 1985-11-09 |
| JPH0576744B2 true JPH0576744B2 (en) | 1993-10-25 |
Family
ID=13720500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59080517A Granted JPS60225358A (en) | 1984-04-20 | 1984-04-20 | Nonaqueous electrolyte battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60225358A (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62160657A (en) * | 1986-01-09 | 1987-07-16 | Sanyo Electric Co Ltd | Nonaqueous electrolyte battery |
| JP2601303B2 (en) * | 1988-03-16 | 1997-04-16 | 三井金属鉱業株式会社 | III. Manganese dioxide and its production method |
| JPH01234330A (en) * | 1988-03-16 | 1989-09-19 | Mitsui Mining & Smelting Co Ltd | Manganese dioxide and its production |
| JP2627304B2 (en) * | 1988-05-20 | 1997-07-02 | 三洋電機株式会社 | Manufacturing method of positive electrode for non-aqueous secondary battery |
| US5770018A (en) * | 1996-04-10 | 1998-06-23 | Valence Technology, Inc. | Method for preparing lithium manganese oxide compounds |
| US5976489A (en) * | 1996-04-10 | 1999-11-02 | Valence Technology, Inc. | Method for preparing lithium manganese oxide compounds |
| CN1042377C (en) * | 1996-05-10 | 1999-03-03 | 中国科学院物理研究所 | Method for synthetizing positive electrode material in lithium ion battery |
| US6348182B1 (en) | 1996-06-27 | 2002-02-19 | The Honjo Chemical Corporation | Process for producing lithium manganese oxide with spinel structure |
| JP3417523B2 (en) * | 1996-10-29 | 2003-06-16 | 本荘ケミカル株式会社 | Method for producing lithium / manganese composite oxide for lithium secondary battery 3V class positive electrode material |
| DE19815611A1 (en) * | 1998-04-07 | 1999-10-14 | Riedel De Haen Gmbh | Process for the production of lithium metal oxides |
| KR100500699B1 (en) * | 2003-01-28 | 2005-07-12 | 한국과학기술원 | Synthesis Method of Cathode Powder for Lithium Secondary Battery by Microwave Heating |
-
1984
- 1984-04-20 JP JP59080517A patent/JPS60225358A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60225358A (en) | 1985-11-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |