JPH0480341A - Negative electrode for nickel-hydrogen storage battery - Google Patents
Negative electrode for nickel-hydrogen storage batteryInfo
- Publication number
- JPH0480341A JPH0480341A JP2194637A JP19463790A JPH0480341A JP H0480341 A JPH0480341 A JP H0480341A JP 2194637 A JP2194637 A JP 2194637A JP 19463790 A JP19463790 A JP 19463790A JP H0480341 A JPH0480341 A JP H0480341A
- Authority
- JP
- Japan
- Prior art keywords
- hydrogen storage
- nickel
- battery
- alloy
- hydrogen
- 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.)
- Granted
Links
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 26
- 239000001257 hydrogen Substances 0.000 title claims abstract description 26
- 239000000956 alloy Substances 0.000 claims abstract description 24
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 24
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 10
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 3
- 239000011575 calcium Substances 0.000 claims abstract 5
- 229910052802 copper Inorganic materials 0.000 claims abstract 5
- 239000010949 copper Substances 0.000 claims abstract 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract 4
- 229910052791 calcium Inorganic materials 0.000 claims abstract 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract 3
- 229910052684 Cerium Inorganic materials 0.000 claims abstract 2
- 229910052779 Neodymium Inorganic materials 0.000 claims abstract 2
- 229910052777 Praseodymium Inorganic materials 0.000 claims abstract 2
- 229910052782 aluminium Inorganic materials 0.000 claims abstract 2
- 229910052788 barium Inorganic materials 0.000 claims abstract 2
- 229910052804 chromium Inorganic materials 0.000 claims abstract 2
- 229910052735 hafnium Inorganic materials 0.000 claims abstract 2
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract 2
- 229910052749 magnesium Inorganic materials 0.000 claims abstract 2
- 229910052710 silicon Inorganic materials 0.000 claims abstract 2
- 229910052712 strontium Inorganic materials 0.000 claims abstract 2
- 229910052719 titanium Inorganic materials 0.000 claims abstract 2
- 229910052726 zirconium Inorganic materials 0.000 claims abstract 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 18
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- 239000013078 crystal Substances 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical group [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 claims 1
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims 1
- 239000011651 chromium Substances 0.000 claims 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims 1
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims 1
- 239000011777 magnesium Substances 0.000 claims 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 claims 1
- 239000007773 negative electrode material Substances 0.000 claims 1
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 claims 1
- 239000010703 silicon Substances 0.000 claims 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 claims 1
- 239000010936 titanium Substances 0.000 claims 1
- 229910002335 LaNi5 Inorganic materials 0.000 abstract description 5
- 229910004269 CaCu5 Inorganic materials 0.000 abstract description 3
- 239000011149 active material Substances 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract description 2
- 229910052748 manganese Inorganic materials 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 229910052793 cadmium Inorganic materials 0.000 description 6
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 6
- 229910052987 metal hydride Inorganic materials 0.000 description 6
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 4
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 229910004247 CaCu Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 1
- 101001012040 Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1) Immunomodulating metalloprotease Proteins 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
Classifications
-
- 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
- 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、ニッケル・水素蓄電池の負極に用いる電気化
学的に水素の吸蔵、放出が可能な蓄電池用負極に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a negative electrode for a nickel-hydrogen storage battery that is capable of electrochemically absorbing and desorbing hydrogen.
従来の技術
エレクトロニクス機器の小形、軽量化に伴ないニッケル
・カドミウム電池の高容量化の研究が進んでいる。当初
、ニッケル極、カドミウム極ともに焼結式と呼ばれるタ
イプの電極が用いられていたが高容量化のため、ニッケ
ル極、カドミウム極ともにペースト式と呼ばれる方式が
開発され、現在に至っている。また、利用率向上のため
、ニッケル極にはコバルト、カドミウム・亜鉛等の添加
カドミウム極ではニッケル・カーボン等の導電材あるい
はポリビニルアルコール、メチルセルロースのような活
物質の凝集防止剤の添加等が研究されている。しかし、
すでに、ニッケル極、カドミウム極の特性上、限界に近
いと言われている。そこで、近年、注目を集めているの
が、ニッケル・水素電池である。Conventional Technology As electronic devices become smaller and lighter, research into increasing the capacity of nickel-cadmium batteries is progressing. Initially, a type of electrode called a sintered type was used for both nickel and cadmium electrodes, but in order to increase the capacity, a type called a paste type was developed for both nickel and cadmium electrodes, which is still used today. In addition, to improve the utilization rate, research is being conducted into adding cobalt, cadmium, zinc, etc. to nickel electrodes, and adding conductive materials such as nickel, carbon, etc. to cadmium electrodes, or addition of active material agglomeration inhibitors such as polyvinyl alcohol and methyl cellulose. ing. but,
It is said that the characteristics of nickel and cadmium electrodes are already close to their limits. Therefore, nickel-metal hydride batteries have been attracting attention in recent years.
ニッケル極はニッケル・カドミウム電池と同一であるが
、水素極は水素吸蔵合金を用いた電池であり、これはカ
ドミウム極のように多くの充放電リザーブを必要としな
いため、設計面から有利となり、電池での高容量化が可
能となる。A nickel electrode is the same as a nickel-cadmium battery, but a hydrogen electrode is a battery that uses a hydrogen storage alloy, which is advantageous from a design standpoint because it does not require a large charge/discharge reserve like a cadmium electrode. It becomes possible to increase the capacity of batteries.
現在、最も可能性のある水素吸蔵合金電極は平衡圧が比
較的低い、ＬａＮ１Ｂ系であり、積極的に研究が進めら
れている。Currently, the most promising hydrogen storage alloy electrode is the LaN1B system, which has a relatively low equilibrium pressure, and is currently being actively researched.
発明が解決しようとする課題
ニッケル・カドミウム電池では充電終了末期あるいは直
後においてのみ電池缶内の圧力が高くなる。ところが、
ニッケル・水素電池では、水素吸蔵合金中の水素が一部
解離し、常に一定の水素ガスが系内に存在する。このた
め、水素吸蔵合金の水素解離圧が高いと、電池缶内の圧
力が高くなってしまう。ＬａＮｉ５は前述したように平
衡圧が比較的低いといっても、０．３〜０．４ＭＰａ（
４０℃）で、ニッケル・カドミウム電池の約０．１ＭＰ
ａ （４０℃）に比べるとかなり高い。Problems to be Solved by the Invention In a nickel-cadmium battery, the pressure inside the battery can increases only at the end of charging or immediately after charging. However,
In nickel-metal hydride batteries, some of the hydrogen in the hydrogen storage alloy dissociates, and a constant amount of hydrogen gas always exists in the system. For this reason, when the hydrogen dissociation pressure of the hydrogen storage alloy is high, the pressure inside the battery can becomes high. Although the equilibrium pressure of LaNi5 is relatively low as mentioned above, it is 0.3 to 0.4 MPa (
Approximately 0.1MP of a nickel-cadmium battery at 40℃)
It is quite high compared to a (40℃).
さらに充電時に至っては通常行なわれている２〜３時間
程度の充電で、電池缶内の圧力が１ＭＰａ以上となって
しまう。一方、電池缶は安全上１〜２ＭＰａ程度で作動
する安全弁を取り付ける必要がある。このため、上記の
圧力に達してしまうと、活物質ともいえる水素ガスが電
池系外に逃げ、安全上問題であると同時に容量低下を起
こす一因となる。このため、ＬａＮｉ、を用いた電池で
は充放電サイクル寿命特性がニッケル・カドミウムに電
池に比べて著しく低いという問題点があった。Furthermore, during charging, the pressure inside the battery can becomes 1 MPa or more after charging for about 2 to 3 hours, which is usually performed. On the other hand, for safety reasons, battery cans must be equipped with a safety valve that operates at about 1 to 2 MPa. Therefore, when the above pressure is reached, hydrogen gas, which can be called an active material, escapes out of the battery system, which is a safety problem and also causes a decrease in capacity. For this reason, batteries using LaNi have a problem in that their charge-discharge cycle life characteristics are significantly lower than those of nickel-cadmium batteries.
課題を解決するための手段
問題点を解決する方法としては水素吸蔵合金の平衡圧を
下げることが最も有効である。ニッケル・水素電池の平
衡圧はＰＣＴ曲線らり求めることができる。第１図に、
−例としＬａＮｉ５のＰＣＴ曲線を示した。横軸が水素
吸蔵量、縦軸が水素圧力である。電池での平衡圧はこの
線図におけるプラト一部に相当する。発明者らは、この
平衡圧と単位格子の体積との関係において検討したとこ
ろ、単位格子体積と平衡圧Ｌｏｇ Ｐとの間に直線関係
が認められた。この関係式はＬｏｇ Ｐ ＝ −０，３
３５Ｖ＋２８．５５５ （但し、Ｐ：平衡圧、■は単位
格子体積）である。それを第２図に示した。ここで、電
池の平衡内圧が０．２ＭＰａ以下であれば、充電時にお
いても、その内圧が１ＭＰａ以上になることはなく、こ
の時の水素吸蔵合金の単位格子の体積は８７．２Ａ″３
である。すなわち、単位格子の体積が８７．２Ｎ３以上
のＣａＣｕ５形の結晶構造の合金を用いることにより、
ニッケル・水素電池の平衡圧を下げることができる。Means for Solving the Problem The most effective way to solve the problem is to lower the equilibrium pressure of the hydrogen storage alloy. The equilibrium pressure of a nickel-metal hydride battery can be determined from the PCT curve. In Figure 1,
- The PCT curve of LaNi5 is shown as an example. The horizontal axis is the hydrogen storage amount, and the vertical axis is the hydrogen pressure. The equilibrium pressure at the cell corresponds to the plateau portion of this diagram. The inventors investigated the relationship between this equilibrium pressure and the volume of the unit cell, and found a linear relationship between the unit cell volume and the equilibrium pressure Log P. This relational expression is Log P = -0,3
35V+28.555 (where P: equilibrium pressure, ■: unit cell volume). This is shown in Figure 2. Here, if the equilibrium internal pressure of the battery is 0.2 MPa or less, the internal pressure will not exceed 1 MPa even during charging, and the volume of the unit cell of the hydrogen storage alloy at this time is 87.2 A''3
It is. That is, by using an alloy with a CaCu5 type crystal structure with a unit cell volume of 87.2N3 or more,
The equilibrium pressure of nickel-metal hydride batteries can be lowered.
作用
本発明の電極をニッケル・水素蓄電池に用いると、平衡
圧をＬａＮｉ５を用いた電極に比べて批判でき、安全性
が高まる。また、充電時に内圧が上昇しても安全弁が作
動する領域には至らず、長寿命なニッケル・水素電池を
提供することができる。Operation When the electrode of the present invention is used in a nickel-metal hydride storage battery, the equilibrium pressure can be reduced compared to an electrode using LaNi5, and safety is improved. Furthermore, even if the internal pressure increases during charging, it does not reach the range where the safety valve operates, making it possible to provide a long-life nickel-metal hydride battery.
実施例 以下、本発明を実施例により説明する。Example The present invention will be explained below with reference to Examples.
実施例１作成した合金組成を第１表のＡからＧに示す。Example 1 The alloy compositions prepared are shown in A to G in Table 1.
ＬａＮ ｉ ５はアーク溶解炉と高周波溶解炉で作成し
た２種を用いた。その他の合金はすべてアーク溶解炉に
より作成したものを用いた。Two types of LaN i 5 were used, one made in an arc melting furnace and one in a high frequency melting furnace. All other alloys were made using an arc melting furnace.
次にこの合金をスタンプミルで粉砕し、３２０メツシユ
アンダーの粉末とした。これらの粉末のＸ線回折の結果
から求めた単位格子体積と平衡圧の関係を第３図に示し
た。この結果、単位格子の体積と平衡圧ｌｏｇ Ｐとは
直線関係にあることが認められた。平衡圧を０．２ＭＰ
ａ以下にするためには８７．２Ｎ３以上にする必要があ
ることがわかった。第３図において、Ａ′〜Ｇ′はＡ〜
Ｇに対応する場合粉末を用いた電池である。Next, this alloy was ground in a stamp mill to obtain a powder of 320 mesh under. FIG. 3 shows the relationship between the unit cell volume and the equilibrium pressure determined from the results of X-ray diffraction of these powders. As a result, it was recognized that there is a linear relationship between the volume of the unit cell and the equilibrium pressure log P. Equilibrium pressure 0.2MP
It was found that in order to make it less than a, it is necessary to make it more than 87.2N3. In Figure 3, A'~G' is A~
If it corresponds to G, it is a battery using powder.
第１表
実施例２
実施例１で作成した合金粉末をポリビニルアルコールの
１０％水溶液でペースト状とし、発泡メタルに充填し、
電極とした。対極には公知の方式で作製された焼結式ニ
ッケル極を用いた。Table 1 Example 2 The alloy powder prepared in Example 1 was made into a paste with a 10% aqueous solution of polyvinyl alcohol, and filled into a foam metal.
It was used as an electrode. A sintered nickel electrode manufactured by a known method was used as the counter electrode.
セパレータはナイロン不織布を用いた。これらの電池構
成要素をＡＡ形サイズに切断し、組み込んだ。電解液は
３０％水酸化カリウム溶液とした。なお、電池容量は７
００から７５０ｍＡｈであった。A nylon nonwoven fabric was used as the separator. These battery components were cut into AA size and assembled. The electrolyte was a 30% potassium hydroxide solution. In addition, the battery capacity is 7
00 to 750mAh.
第４図にＱ、５ｃｍＡで充電した時の電池内圧曲線を示
す。図中において、電池ａは電極Ａを用いた電池を示し
、以下同様にｂ−ｇはＢ−Ｇの電極を用いた電池である
。電池ａは充電開始後約２時間４０分で１．４ＭＰａに
なり安全弁が作動した。電池ｄは充電終了時まで約１．
ＩＭＰａ、電池ｅは約０．８ＭＰａ、電池ｆは約１．６
ＭＰａであった。FIG. 4 shows the battery internal pressure curve when charged at Q, 5 cmA. In the figure, battery a indicates a battery using electrode A, and similarly, bg indicates a battery using electrodes BG. Approximately 2 hours and 40 minutes after the start of charging, battery a reached 1.4 MPa and the safety valve was activated. Battery d lasts approximately 1.
IMPa, battery e is approximately 0.8MPa, battery f is approximately 1.6
It was MPa.
実施例３
実施例２で用いた電池を０．５ｃｍＡで３時間充放電、
オープン２０分、１ｃｍＡで放電したときの充電サイク
ル寿命試験結果を示した。このように電池ａ、ｂ、ｃは
充放電をくり返すと５０サイクル目には初期容量の５０
％近くにまで低下してしまった。しかし、電池ｄ、ｅ、
ｆ、ｇは、それらの電池にくらべると、非常に充放電サ
イクルによる劣化が少な（、本発明による電極を用いた
電池が有用であることがわかる。この理由は、充電時に
内圧が上昇し、水素ガスが系外に出てしまうためであろ
うと推定される。なお、平衡圧の低いｆ、ｇによる容量
の低下はニッケル極によるものと思われる。Example 3 The battery used in Example 2 was charged and discharged at 0.5 cmA for 3 hours,
The results of a charging cycle life test when the battery was opened for 20 minutes and discharged at 1 cmA are shown. In this way, when batteries a, b, and c are repeatedly charged and discharged, at the 50th cycle, they reach 50% of their initial capacity.
It has dropped to almost %. However, batteries d, e,
Compared to those batteries, f and g show very little deterioration due to charging and discharging cycles (It can be seen that the battery using the electrode according to the present invention is useful. It is presumed that this is because hydrogen gas escapes from the system.The decrease in capacity due to low equilibrium pressures f and g is thought to be due to the nickel electrode.
発明の効果
このように本発明による水素吸蔵合金を用いると、Ｌａ
Ｎｉ５等を用いた電池に比べて、電池内圧を抑制できる
。また、充放電サイクル寿命をのばすことができる。Effects of the Invention As described above, when the hydrogen storage alloy according to the present invention is used, La
Compared to batteries using Ni5 or the like, the battery internal pressure can be suppressed. Furthermore, the charge/discharge cycle life can be extended.
第１図はＬａＮｉ５のＰＣＴ曲線図、第２図はＣａＣｕ
Ｂ形構造を有する単位格子体積と平衡圧の関係図、第３
図は第１表で作製した合金の単位格子の体積と平衡圧の
関係図、第４図は０．５ｃｍＡで充電したときの電池内
圧曲線図、第５図は充放電サイクルに伴なう放電容量の
変化を示す図である。
Ｄ′〜Ｇ′ ：電池、ｄ−ｇ：電池Figure 1 is a PCT curve diagram of LaNi5, Figure 2 is a diagram of CaCu
Relationship diagram between unit cell volume and equilibrium pressure with B-shaped structure, 3rd
The figure shows the relationship between the volume of the unit cell of the alloy prepared in Table 1 and the equilibrium pressure, Figure 4 shows the internal pressure curve of the battery when charged at 0.5 cmA, and Figure 5 shows the relationship between the volume and equilibrium pressure of the unit cell of the alloy prepared in Table 1. FIG. 3 is a diagram showing changes in capacitance. D'~G': Battery, d-g: Battery
Claims (1)
ランタン、ネオジウム、セリウム、プラセオジウム、チ
タン、ジルコニウム、ハフニウム、マグネシウム、カル
シウム、ストロンチウム、バリウムのうち少なくとも１
種以上の元素から成り、かつ銅サイトがクロム、マンガ
ン、コバルト、ケイ素、ニッケル、銅、アルミニウム、
亜鉛のうち少なくとも１種以上の元素からなる水素吸蔵
合金であって、該吸藏合金の４０℃における水素との平
衡圧Ｐが、該吸蔵合金の単位格子体積と ｌｏｇＰ＝−０．３３５Ｖ＋２８．５５５の関係にあっ
て、かつＶが８７．２×１０＾−＾３・ｍ＾３以上であ
る水素吸蔵合金を負極活物質として用いることを特徴と
するニッケル・水素蓄電池用負極。[Scope of Claims] CaCu_5 type crystal structure, and the calcium site is at least one of lanthanum, neodymium, cerium, praseodymium, titanium, zirconium, hafnium, magnesium, calcium, strontium, and barium.
It consists of more than one element, and the copper site is chromium, manganese, cobalt, silicon, nickel, copper, aluminum,
A hydrogen storage alloy consisting of at least one element among zinc, where the equilibrium pressure P with hydrogen at 40°C of the hydrogen storage alloy is equal to the unit cell volume of the storage alloy and logP=-0.335V+28.555. A negative electrode for a nickel-hydrogen storage battery, characterized in that a hydrogen storage alloy having the following relationship and having a V of 87.2×10^-^3·m^3 or more is used as a negative electrode active material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2194637A JP2926925B2 (en) | 1990-07-23 | 1990-07-23 | Negative electrode for nickel-metal hydride storage battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2194637A JP2926925B2 (en) | 1990-07-23 | 1990-07-23 | Negative electrode for nickel-metal hydride storage battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0480341A true JPH0480341A (en) | 1992-03-13 |
| JP2926925B2 JP2926925B2 (en) | 1999-07-28 |
Family
ID=16327828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2194637A Expired - Lifetime JP2926925B2 (en) | 1990-07-23 | 1990-07-23 | Negative electrode for nickel-metal hydride storage battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2926925B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0645003A (en) * | 1992-06-09 | 1994-02-18 | Furukawa Battery Co Ltd:The | Manufacture of sealed storage battery by using hydrogen storage electrode and hydrogen storage alloy for this electrode |
| JP2016223921A (en) * | 2015-05-29 | 2016-12-28 | 国立大学法人名古屋大学 | Hydrogen storage capacity measurement method and hydrogen storage capacity measurement apparatus |
-
1990
- 1990-07-23 JP JP2194637A patent/JP2926925B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0645003A (en) * | 1992-06-09 | 1994-02-18 | Furukawa Battery Co Ltd:The | Manufacture of sealed storage battery by using hydrogen storage electrode and hydrogen storage alloy for this electrode |
| JP2016223921A (en) * | 2015-05-29 | 2016-12-28 | 国立大学法人名古屋大学 | Hydrogen storage capacity measurement method and hydrogen storage capacity measurement apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2926925B2 (en) | 1999-07-28 |
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