JPH02234365A - Lithium battery - Google Patents
Lithium batteryInfo
- Publication number
- JPH02234365A JPH02234365A JP1055447A JP5544789A JPH02234365A JP H02234365 A JPH02234365 A JP H02234365A JP 1055447 A JP1055447 A JP 1055447A JP 5544789 A JP5544789 A JP 5544789A JP H02234365 A JPH02234365 A JP H02234365A
- Authority
- JP
- Japan
- Prior art keywords
- lithium
- battery
- aluminum
- negative electrode
- batteries
- 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 abstract description 49
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 49
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 239000011149 active material Substances 0.000 claims description 4
- 238000003795 desorption Methods 0.000 claims description 3
- 230000002687 intercalation Effects 0.000 claims description 2
- 238000009830 intercalation Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 229910000838 Al alloy Inorganic materials 0.000 abstract description 6
- JFBZPFYRPYOZCQ-UHFFFAOYSA-N [Li].[Al] Chemical compound [Li].[Al] JFBZPFYRPYOZCQ-UHFFFAOYSA-N 0.000 abstract description 6
- 229910000733 Li alloy Inorganic materials 0.000 description 7
- 239000001989 lithium alloy Substances 0.000 description 7
- 239000003792 electrolyte Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000007774 positive electrode material Substances 0.000 description 5
- 239000008188 pellet Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000005486 organic electrolyte Substances 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- KWGKDLIKAYFUFQ-UHFFFAOYSA-M lithium chloride Chemical compound [Li+].[Cl-] KWGKDLIKAYFUFQ-UHFFFAOYSA-M 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910021446 cobalt carbonate Inorganic materials 0.000 description 1
- ZOTKGJBKKKVBJZ-UHFFFAOYSA-L cobalt(2+);carbonate Chemical compound [Co+2].[O-]C([O-])=O ZOTKGJBKKKVBJZ-UHFFFAOYSA-L 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000029142 excretion Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000005802 health problem Effects 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
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000011255 nonaqueous electrolyte Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 238000010626 work up procedure Methods 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
- H01M4/52—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
-
- 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
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、リチウム電池に関するものである．従来の技
術
リチウム電池は、負極には通常、金属リチウムまたはリ
チウムアルミニウム合金等のリチウム合金が用いられ、
正極にはリチウムがインターカレートする物質が用いら
れ、電解液には有機電解液，溶融塩電解液あるいは固体
電解質等の非水電解液が用いられている．
リチウム電池は、水溶液系の電池に比べて、放ｔｔ圧が
高いこと、エネルギー密度が高いこと等の優れた特徴を
有している．しかし、負極に用いられている金属リチウ
ムやリチウム合金が空気中の水分ときわめて容易に反応
するので、水溶液糸の電池に比べてその製造における取
扱いが煩雑である。すなわち、通常の室内で負極を取扱
うと、空気中の水分と反応して電池性能の著しい低下を
招くばかりか、反応熱が原因となって火災を引き起こす
恐れがある．このような火災の危険性は、可燃性の電解
液である有ｎ電解液を用いた電池の場合に特に大きい．
したがって、従来のリチウム電池の製造は、品質の低下
や火災の危険性を考慮して、乾燥雰囲気の中で行なう必
要があった．この場合、乾燥雰囲気とは、露点が少なく
とも−４０℃以下に保たれた状態をいう．この様な乾燥
状態を実現するためには、モノキュラーシーブや塩化リ
チウムの中を通って空気を循環させるような循環精製装
置を供えた適度な気密性を有する部屋、いわゆるドライ
ルームが必要である．
発明が解決しようとする課題
従来のリチウム電池の製造においては、金属リチウムや
リチウム合金に起因する火災の発生という安全上の間趙
点、また、ドライルームを建設しこれを運転する費用を
必要とするコスト上の問題点、さらに長時間ドライルー
ム内で人間が作業した場合の人体への悪影響という健康
上の問題があった．
課題を解決するための手段
本発明ではリチウム電池において、充放電反応がリチウ
ムの吸蔵・放出過程である活物質を正極に用い、アルミ
ニウムを負極に用いることにより、上述の問題点を解決
する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to lithium batteries. Conventional technology Lithium batteries typically use metallic lithium or a lithium alloy such as a lithium aluminum alloy for the negative electrode.
A material that intercalates lithium is used for the positive electrode, and a nonaqueous electrolyte such as an organic electrolyte, molten salt electrolyte, or solid electrolyte is used for the electrolyte. Lithium batteries have superior characteristics, such as higher discharge pressure and higher energy density, than aqueous batteries. However, since the metal lithium or lithium alloy used in the negative electrode reacts extremely easily with moisture in the air, handling during production is more complicated than with aqueous solution thread batteries. In other words, if the negative electrode is handled indoors, it not only reacts with moisture in the air, resulting in a significant drop in battery performance, but also poses a risk of fire due to the heat of reaction. The risk of such a fire is particularly great in the case of batteries that use n-containing electrolytes, which are flammable electrolytes. Therefore, conventional lithium battery manufacturing had to be carried out in a dry atmosphere due to the risk of quality deterioration and fire. In this case, a dry atmosphere means a state in which the dew point is maintained at at least -40°C or lower. In order to achieve such dry conditions, a so-called dry room, a room with appropriate airtightness, is required, equipped with a monocular sieve or a circulation purification device that circulates air through lithium chloride. Problems to be Solved by the Invention In the conventional manufacturing of lithium batteries, there are safety issues such as fires caused by metallic lithium and lithium alloys, and the expense of constructing and operating a dry room. There was a cost problem, as well as a health problem due to the negative effects on the human body if people worked in a dry room for a long time. Means for Solving the Problems The present invention solves the above-mentioned problems by using, in a lithium battery, an active material whose charge/discharge reaction is a lithium intercalation/desorption process for the positive electrode and aluminum for the negative electrode.
作用
従来のリチウム電池の製逍における品質上，コスト上，
安全上等の問題点は、通常の空気中では取扱うことがで
きない金属リチウムまたはリチウム合金を負極として用
いていることに起因している。Effects Due to quality and cost issues in conventional lithium battery manufacturing,
Safety and other problems arise from the use of metallic lithium or lithium alloy, which cannot be handled in normal air, as the negative electrode.
本発明では、これらの金属に変えて、アルミニウムを負
極に用いて電池を組立て゛る。アルミニウムは、その表
面に薄い酸化被膜を生成した後は安定なので通常の室内
で取扱うことができる．また、アルミニウムはリチウム
を吸蔵・放出できるという特徴を有している．さらに本
発明では正極活物質として、充放電反応がリチウムの吸
蔵・放出であるものを用いるが、組み立て時にはこの活
物質を、リチウムを吸蔵した状態、すなわち放電状態で
用いる．
本発明の電池を充電ずると、正極に吸蔵されていたリチ
ウムが放出されると共に、負極のアルミニウムにリチウ
ムが吸蔵されてリチウムアルミニウム合金を形成する．
すなわち、アルミニウム負極は、最初の充電によってリ
チウムアルミニウム合金に転換される．そして、その後
の充放電サイクルにおいては、負極に金属リチウムやリ
チウム合金を用いて、正極に充電状態の活物質を用いて
、乾燥雰囲気中で組立てた従来のリチウム電池と同等の
特性が得られる。In the present invention, a battery is assembled using aluminum for the negative electrode instead of these metals. Aluminum is stable after a thin oxide film is formed on its surface, so it can be handled indoors. Additionally, aluminum has the characteristic of being able to absorb and release lithium. Furthermore, in the present invention, a positive electrode active material whose charge/discharge reaction is occlusion and desorption of lithium is used, and during assembly, this active material is used in a state in which lithium is occluded, that is, in a discharge state. When the battery of the present invention is charged, the lithium occluded in the positive electrode is released, and lithium is occluded in the aluminum of the negative electrode, forming a lithium-aluminum alloy.
That is, the aluminum negative electrode is converted into a lithium aluminum alloy by the first charge. Then, in subsequent charge/discharge cycles, characteristics equivalent to those of conventional lithium batteries assembled in a dry atmosphere can be obtained using metallic lithium or lithium alloy for the negative electrode and a charged active material for the positive electrode.
実施例
以下、本発明を好適な実施例を用いて説明する．まず、
負極板の製法を述べる．直径が１５１１で厚さが０．
２ｎｌのアルミニウム円板を２０１６形リチウムボタン
電池の負極ケースにスポット溶接して負極板とした。金
属リチウムやリチウムアルミニウム合金を負極に用いた
従来の電池は、負極の溶融・燃焼をまねくので、負極を
ケースにスポット溶接することができなかった。つまり
本発明のリチウム電池は、従来のリチウム電池と比較し
て製造が容易であるだけでなく、電極とケースとの電子
電導性が良好であるという点で６１＊れている．次に、
正極の製造方法について述べる．炭酸リチウムと炭酸コ
バルトとの混合物をペレット状に成形して９００℃で２
０時間熱分解した後、ベレットを再度粉砕しな．そして
、グラファイトを１０ｗｔ％混合添加した後ｏ．ｏａｇ
を秤量して金型に投入して直径が１５ｎｎで厚さが０．
６１ｉのペレット状に成形した．このペレットを１００
メッシュのアルミニウム金網で包んで正極板とした。熱
分解により合成された正極活物質は、充放電反応がリチ
ウムの吸蔵・放出過程であって化学式がＬｉ． Ｃｏｄ
． （ ０ ＜ ｘ≦１）で示されるような物質である
．この物質はリチウムを吸蔵した状態では、比較的安定
しているので通常の空気中で取汲うことができる。EXAMPLES The present invention will be explained below using preferred examples. first,
The manufacturing method of the negative electrode plate will be described. The diameter is 1511 and the thickness is 0.
A 2nl aluminum disc was spot welded to the negative electrode case of a 2016 type lithium button battery to form a negative electrode plate. Conventional batteries that use metallic lithium or lithium-aluminum alloy for the negative electrode cannot be spot-welded to the case because this would cause the negative electrode to melt and burn. In other words, the lithium battery of the present invention is superior to conventional lithium batteries in that it is not only easier to manufacture, but also has better electronic conductivity between the electrode and the case. next,
This section describes the method for manufacturing the positive electrode. A mixture of lithium carbonate and cobalt carbonate is formed into pellets and heated at 900℃ for 2 hours.
After 0 hours of pyrolysis, the pellets should not be ground again. After adding 10 wt% of graphite, o. oag
was weighed and put into a mold to form a mold with a diameter of 15 nn and a thickness of 0.
It was molded into 61i pellets. 100 of these pellets
It was wrapped in a mesh aluminum wire gauze to form a positive electrode plate. The positive electrode active material synthesized by thermal decomposition has a chemical formula of Li. Cod
．． It is a substance as shown by (0 < x≦1). This material is relatively stable when it absorbs lithium, so it can be extracted in normal air.
ここまでの作業は、通常の室内で行なったが、これ以降
の作業は水分を嫌う有機電解液を取扱うために、従来の
リチウム電池と同様にドライルーム内で行なった。なお
、負極および正極板は、ドライルームに持ち込む前に１
２０℃で２０時間の真空乾燥を行なった。The work up to this point was carried out in a normal room, but the following work was carried out in a dry room, as with conventional lithium batteries, in order to handle an organic electrolyte that dislikes moisture. Please note that the negative and positive electrode plates are
Vacuum drying was performed at 20° C. for 20 hours.
正極板を２０１６形リチウム電池の正極ケースの中央に
セットして、その上に直径が１６１’ｌｌｌで厚さが０
．３１ｍのポリエチレン製の微孔セパレーターをセット
した．そして、１８ ＬＩＣＩ０４ ＰＣ／ＤＨＥｔ
解液を３０μ１注液した後に負極ケース（前述のように
、アルミニウム負極板をスポット溶接したもの）をセッ
トして封ロした．こうして得られた電池を本発明のリチ
ウム電池Ａとする．
次に電池Ａと同様にアルミニウム負極板を負極ケースに
スポット溶接する工程を通常の室内で行なった電池であ
って、正極活物質として［ｉえＨｎＯ．（０くｘ≦１）
を用いた以外は電池Ａと同様な電池を本発明の電池Ｂと
する．また、同じく正極活物質としてＬｉ． ＴｉＳｚ
（ ０ ＜ ｘ≦１）を用いた電池を本発明の電池Ｃ
とする．．さらに正極活物質としてＬｉ． Ｖユ０５（
０＜ｘ≦１）を用いた電池を本発明の電池Ｄとする．電
池Ｂ，ＣおよびＤに用いた正極活物質は、吸湿性がきわ
めて強いので、通常の室内で取扱うことができなかった
．このため、電池Ａに比較して、ドライルーム内での作
業の割合が増加したが、従来のリチウム電池に比べれば
、負極を通常の室内で取扱えるので作業性や安全性等が
より優れている。Set the positive electrode plate in the center of the positive electrode case of a 2016 type lithium battery, and place a plate with a diameter of 161'lll and a thickness of 0 on top of it.
．． A 31 m polyethylene microporous separator was installed. And 18 LICI04 PC/DHEt
After injecting 30 μl of the solution, a negative electrode case (as described above, an aluminum negative electrode plate spot-welded) was set and sealed. The battery thus obtained is referred to as lithium battery A of the present invention. Next, as in Battery A, the process of spot welding the aluminum negative electrode plate to the negative electrode case was carried out in a normal room, and the positive electrode active material was [ie HnO. (0x≦1)
Battery B of the present invention is a battery similar to Battery A except that . Similarly, Li. TiSz
(0<x≦1) as the battery C of the present invention.
Suppose that ．． Furthermore, Li. Vyu05(
0<x≦1) is referred to as battery D of the present invention. The positive electrode active materials used in Batteries B, C, and D were extremely hygroscopic and could not be handled indoors. For this reason, compared to Battery A, the percentage of work required in a dry room has increased, but compared to conventional lithium batteries, the negative electrode can be handled in a normal room, making workability and safety superior. There is.
次に、電池Ａと同様に正極活物質にＬｉｉ ＣＱＯ２を
用いて、後述の多孔性のアルミニウム電極を負極に用い
た電池を本発明の電池Ｅとする．金属リチウムやリチウ
ム合金を負極に用いた従来のリチウム電池では、金属粉
末を出発材料として多孔性の負極板を得ることが非常に
困難であった。それは、金属リチウムやリチウム合金が
水と激しく反応するので、これらの金属粉末を乾燥状態
で取扱わねばならず、火災や爆発等の危険性が極めて大
きかったことに起因している．しかし本発明の電池では
、アルミニウム粉末を用いて、下記に示す安全な湿式法
により多孔性電極を得ることができた。すなわち、１８
０〜３２０メッシュのアルミニウム粉末１００重量部に
、精製水４０重量部およびポリエチレン系接着剤の固形
分５重量部を添加して混合しペースト状にした。このペ
ーストを厚さが０．２５ｎｉのニッケルエキスバンドネ
ットに均一に塗布して乾燥させた後、軽くプレスして円
板状に打ち抜いた。この結果、直径が１ ５１′ｏｎ
，厚さが０． ２ｍｍで多孔度が３０％の多孔性アルミ
ニウム電極が得られた．この多孔性アルミニウム電極の
一部分を加圧して平坦面を形成して、その平坦面を負極
ケースにスポット溶接した。このような多孔性アルミニ
ウム負極板を用いると、後述するように、電極の作用面
積の増加に伴う平均電流密度の低下によって、有機電解
液電池の欠点であった大電流密度の放電を行なった場合
の放電電圧の低下が抑制される。Next, as in Battery A, a battery using Lii CQO2 as the positive electrode active material and a porous aluminum electrode as described below as the negative electrode is designated as Battery E of the present invention. In conventional lithium batteries that use metallic lithium or lithium alloy for the negative electrode, it is extremely difficult to obtain a porous negative electrode plate using metal powder as a starting material. This is because metallic lithium and lithium alloys react violently with water, so these metal powders had to be handled in a dry state, posing an extremely high risk of fire or explosion. However, in the battery of the present invention, a porous electrode could be obtained using aluminum powder by a safe wet method described below. That is, 18
40 parts by weight of purified water and 5 parts by weight of solid content of polyethylene adhesive were added to 100 parts by weight of aluminum powder of 0 to 320 mesh and mixed to form a paste. This paste was uniformly applied to a nickel expanded band net having a thickness of 0.25 ni, dried, and then lightly pressed to punch out a disk shape. As a result, the diameter is 1 51'on
, thickness is 0. A porous aluminum electrode with a thickness of 2 mm and a porosity of 30% was obtained. A portion of this porous aluminum electrode was pressurized to form a flat surface, and the flat surface was spot welded to the negative electrode case. When such a porous aluminum negative electrode plate is used, as will be described later, the average current density decreases due to the increase in the active area of the electrode, making it difficult to discharge at a high current density, which has been a drawback of organic electrolyte batteries. The decrease in discharge voltage is suppressed.
以上の本発明の電池Ａ，Ｂ，Ｃ，ＤおよびＥは、負極板
を負極ケースにスポット溶接する工程を通常の室内で行
なったが、この間に負極板が室内に放置されていた時間
は１〜４時間であった．次に比較のために、従来のリチ
ウム電池の負極板を本発明と同様に室内に放置した後組
立てた。In the batteries A, B, C, D, and E of the present invention described above, the process of spot welding the negative electrode plate to the negative electrode case was carried out in a normal room, but the time during which the negative electrode plate was left indoors was 1. It was ~4 hours. Next, for comparison, the negative electrode plate of a conventional lithium battery was assembled after being left indoors in the same manner as in the present invention.
すなわち、厚さが０．２ｎｌで直径が１５ｌＩの金属リ
チウム負極板を通常の室内に３０分間放置した後ドライ
ルームに持ち込み、二酸化マンガンを正極として、電池
Ａと同様のセパレーター，電解液を用いた比較のための
電池Ｆを製作した。That is, a metal lithium negative electrode plate with a thickness of 0.2 nl and a diameter of 15 lI was left in a normal room for 30 minutes and then brought into a dry room, and manganese dioxide was used as a positive electrode, and the same separator and electrolyte as in Battery A were used. Battery F was manufactured for comparison.
これらの電池Ａ〜Ｆを２０℃， １ｎＡ／一で放電して
電圧特性を比較した。その結果を第１図に示す。These batteries A to F were discharged at 20° C. and 1 nA/1 and their voltage characteristics were compared. The results are shown in FIG.
なお、本発明による電池Ａ−′−Ｅは、それぞれ２０℃
で次に示す充電を行った後に放電した．ＡおよびＥは１
ｌ＾／ａａで充電電圧が４．３ｖに至るまで充電した．
また、Ｂ！，ｔ３．５Ｖまで、Ｃは２．８ｖまで、Ｄｉ
，ｔ３．５Ｖまでそれぞれ１ １Ａ／一で充電した．
同図より電池Ａ，Ｂ，Ｃ，ＤおよびＥは、いずれも水溶
液系の電池では得られないような高い放電電圧を示した
が、電池Ｆは放電容量がほとんど得られなかった。この
ことから本発明のリチウム電池は、少なくとも負極板の
取汲いを通常の室内で行なうことができるが、従来のリ
チウム電池では不可能であることがわかる。また、電池
Ａと電池Ｅを比較すると、電池Ｅの放電電圧が高かった
。In addition, batteries A-'-E according to the present invention were heated at 20°C.
The battery was charged as shown below and then discharged. A and E are 1
I charged it at l^/aa until the charging voltage reached 4.3V.
Also, B! , t up to 3.5V, C up to 2.8V, Di
, and charged at 11A/1 to t3.5V. As shown in the figure, batteries A, B, C, D, and E all showed high discharge voltages that cannot be obtained with aqueous batteries, but battery F had almost no discharge capacity. This shows that the lithium battery of the present invention allows at least the removal of the negative electrode plate in a normal room, which is not possible with conventional lithium batteries. Furthermore, when comparing Battery A and Battery E, the discharge voltage of Battery E was higher.
これは負極板に多孔性電極を用いたことに起因するもの
である。This is due to the use of a porous electrode for the negative electrode plate.
発明の効果
以上述べたように本発明によって、製造が容易安全であ
り、しかも
■負極板を電池ケースにスポット溶接することが可能で
あるため、従来の接触のみによる場合に比較して負極板
とケース間の電子電導性が優れている。Effects of the Invention As described above, the present invention is easy and safe to manufacture, and also allows spot welding of the negative electrode plate to the battery case, making it easier to connect the negative electrode plate to the battery case than by conventional contact only. Excellent electronic conductivity between cases.
■負極板を多孔性電極にすることが可能であるため、大
電流で放電した場合の放電電圧の低下が少ない．
等の優れた特徴を有したリチウム電池を提供することが
できる。■Since the negative electrode plate can be made into a porous electrode, there is little drop in discharge voltage when discharging at a large current. It is possible to provide a lithium battery having excellent characteristics such as the following.
第１図は、 本発明のリチウム電池と従来のリチ ウム電池の放電電圧特性を比較した図である．身 固 電泄必族重犯工野性 ＃位オ問 ／ ｈｒ Figure 1 shows The lithium battery of the present invention and the conventional lithium battery This is a diagram comparing the discharge voltage characteristics of umum batteries. body solid Electric excretion necessary serious criminal factory sex ＃ rank o question / hr
Claims (1)
を正極に用い、アルミニウムを負極に用いたことを特徴
とするリチウム電池。A lithium battery characterized by using an active material whose charge/discharge reaction is a lithium intercalation/desorption process for the positive electrode and aluminum for the negative electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1055447A JPH02234365A (en) | 1989-03-08 | 1989-03-08 | Lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1055447A JPH02234365A (en) | 1989-03-08 | 1989-03-08 | Lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02234365A true JPH02234365A (en) | 1990-09-17 |
Family
ID=12998853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1055447A Pending JPH02234365A (en) | 1989-03-08 | 1989-03-08 | Lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02234365A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63261674A (en) * | 1987-04-17 | 1988-10-28 | Sanyo Electric Co Ltd | Nonaqueous electrolyte secondary battery |
| JPS63285865A (en) * | 1987-05-18 | 1988-11-22 | Sanyo Electric Co Ltd | Nonaqueous electrolyte secondary battery |
| JPH02114465A (en) * | 1988-10-21 | 1990-04-26 | Matsushita Electric Ind Co Ltd | Lithium secondary battery |
-
1989
- 1989-03-08 JP JP1055447A patent/JPH02234365A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63261674A (en) * | 1987-04-17 | 1988-10-28 | Sanyo Electric Co Ltd | Nonaqueous electrolyte secondary battery |
| JPS63285865A (en) * | 1987-05-18 | 1988-11-22 | Sanyo Electric Co Ltd | Nonaqueous electrolyte secondary battery |
| JPH02114465A (en) * | 1988-10-21 | 1990-04-26 | Matsushita Electric Ind Co Ltd | Lithium secondary battery |
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