TW466789B - High-performance and high-efficiency secondary battery - Google Patents

Abstract

The present invention relates to a kind of high- performance and high-efficiency secondary battery that contains the followings: a positive electrode structure, which is located on the electric collector substrate and is capable of filling the conductive substrate with nickel hydroxide particles, conductive material and smearing liquid; a negative electrode structure, which is located on the electric collector substrate and is capable of filling the conductive substrate with hydrogen-absorbing alloy metal, conductive material and smearing liquid; a separation paper, which is located inside the secondary battery and is capable of separating positive electrode from negative electrode; and an alkaline electrolyte, which is located inside the secondary battery. The composition of alkaline electrolyte is formed by the wolframic-acid mixed-liquid of potassium hydroxide (KOH), sodium hydroxide (NaOH) and lithium hydroxide (LiOH). The wolframic-acid mixed-liquid has wolframic-acid lithium, wolframic-acid sodium, wolframic-acid potassium, and so on.

Description

466789 Related to a liquid composition consisting of a hydrogen-absorbing alloy electrode and a nickel electrode. Battery power supply for consumer electronics or electric vehicles. Among many secondary and cadmium ring secondary battery structures, the record-one mine battery is inferior to the record-a nitrogen battery nickel-cadmium battery due to security claims. It has a high energy density and five, invention description α) The present invention is The electrolysis of the secondary battery is increasing its energy density in the secondary application. Therefore, compared with the better environmentally-friendly and superior technology, its alloying substance is combined and then filled in the lead (of course, as above, when it is a problem, However, when it should be easy to carry out precipitation charging and discharging a small number of times, so that the activity at high temperature can be shortened, for example, hydrogen can be added to hydrogen. However, the restriction of the amount of electrolysis is changed, and the discharge cost is still a problem. The development of secondary batteries based on mixed positive current collectors with positive and negative conductive materials will increase the low temperature or temperature limit of secondary batteries due to high temperatures or oxygen side reactions, which will increase the material utilization rate of secondary batteries. , Potassium oxide (KOH), sodium (NaOH); or the composition of the solution is lowered under the high current and the reduction is noticed. After the development of nickel-metal hydride batteries, the reversible absorption and desorption of hydrogen with nickel oxide was added, and a binder was added and adjusted into a paste to form the electrode structure. In the structure, when its cooperating device is over-tolerable, and does not produce too much work at local temperature, its surface temperature effect reduces the charging efficiency of the positive electrode, and the electrolyte liquid leaks more and more with the generation of gas.> In the conventional technology, in order to increase the composition of the electrolyte, or the lithium hydroxide (Li 0H) aqueous solution is usually used to increase the cobalt content in the nickel hydroxide crystal. The disadvantage is that the added sodium hydroxide has a high rate discharge. : Electrical properties; while increasing the amount of cobalt results in nickel-metal hydride batteries, on the other hand, standing still under full charge, due to hydrogen-absorbing alloys

Page 4 466789 V. Description of the invention (2) The hydrogen atoms on the surface become the & pole surface, and the Ni-Ni〇〇H ^; The voltage of the open circuit becomes Nl (0H), and the natural discharge is easy to occur, which makes the charging lightning If, and this reaction still has better holding characteristics at high temperatures when the temperature is higher. Generally, in order to maintain the ability to change the composition of the electrolyte solution, an appropriate release paper can be adopted or changed to this. In the process of the present invention, the structure is put into practice through in-depth theoretical research and practice and applied. A method of composing a human battery, according to the composition rate of the present invention and effectively reducing the self-discharge test. It is confirmed that the main purpose of improving the charging efficiency is actually to increase the composition of the battery. : Door-level hand one-human battery can increase its active substance; a range of operating temperature, especially the utilization rate of this substance at high temperature to improve its charging efficiency. The purpose of this article is to provide a high-performance and high-efficiency secondary battery, and the φφ structure can improve the self-discharge reaction that occurs sharply at high temperatures. Fat B has two charge retention rates to extend battery life. At the same time, the purpose is to provide a high-performance and high-efficiency secondary battery. The use of appropriate insulation paper and changing the composition of the electrolyte to prevent the disadvantages of the high-power process, and achieve the effect of effective charge and discharge. The following reviewers are responsible for understanding the purpose, features, and effects of the present invention: 'Detailed descriptions, examples', and the accompanying drawings to make the present invention-detailed pole 1 ref = the first picture, the secondary battery 1 It mainly contains the battery negative battery positive electrode 20, separator paper 3 〇 and electrolyte 4 〇, 466 789 V. Description of the invention (3) Its characteristics and effects are described as follows (1) Battery negative part: The negative electrode is mainly It consists of a hydrogen-absorbing alloy-based mixture, which is a mixture of hydrogen-absorbing alloy powder into the lightning-conducting Mr / τ W muscle. You will fill the conductive current collector substrate. 彳 #t 粘 、 · σ 剂 =: Fill it with ^ and wait for it to be rolled and rolled to a fixed thickness to make a negative electrode: a hydrogen absorbing alloy such as UNi5, LmNi5L (Lm is a rare earth το element mixture containing La), and a part of N 丨 of these alloys Multi-element systems substituted with elements such as Al, Mn, Co, Ti, Cu, Zr, Cr, B, or T i N l systems, τ i F e systems. In general terms:

LmNi aC〇bMncAl dzr e (where a, b, c, d, and e are their atomic ratios, and the upper and lower limits of their total values are 5. 00 and 5. 50 ', that is, 5. 0.00 = = a + b + c + d + es 5.50) (represents the composition of the hydrogen absorbing alloy ', its characteristic is that it is not easy to micronize with the progress of the charge and discharge cycle, and increases the charge and discharge life of the general formula.

LmN i aCo bMn CA1 dZr e 'This preferred embodiment is suggested to be composed in the following manner: 4. 09 a 4. 50 0. 38 b 4. 50 0. 20 c 0. 31 0. 31 d 0. 41 0. 001 $ e 0. 01 Carbon black, graphite, etc. For the above conductive materials in a proportion of 0.1 to 5 weight percent of the foregoing conductive materials, such as nickel powder 100 weight percentage of hydrogen absorbing alloy powder, should. Types of the aforementioned binders, such as polyacrylate, carboxymethyl cellulose

Page 6 4 6 6 789 V. Description of the invention (4) ~ '— ~ -—_ ”or poly: fluorinated ethylene and other resins, ± the hydrogen absorbing alloy powder in the ratio of the binder mentioned above, mixed with 0M The weight of '^ is preferably one hundred conductive materials. The amount of the above-mentioned types of conductive collector substrate (_), a metal mesh two-dimensional structure substrate, or a three-dimensional structure substrate such as a record: = dimension. Nickel mesh, nickel metal fiber (2) The positive electrode part of the battery: The f pole is mainly a mixture of nickel hydroxide, and the nickel oxide powder is fully mixed into the lead j.

The substrate was made into a fixed thickness after it was dried. The above-mentioned nickel hydroxide had a weight percentage of 1.0 to 5.0 in the nickel hydroxide = and a zinc component, respectively. U-5 was used. The following weight ratio method is suitable: co-precipitation of column and metal nickel is recommended. 2.5 ^ Zng 5.0 1.5 ^ Co ^ 3.5 The average particle size of the above-mentioned atmospheric nickel oxide u # is preferably 2.0 to 2.3 g / cm. Table ^ is preferably Bu 3〇 # m, and the specific surface density is preferably spherical or approximately spherical. The surface area is preferably from 8 to 25 mVg, and the shape of the foregoing positive electrode is a bismuth-conducting bismuth hydroxide drill, etc., which is mixed with 1 == 4, if there is a metal drill, palladium oxide or co-precipitation. For hydroxide recording, it is not advisable to add nickel hydroxide powder. The blending amount of the oxide record is ". The weight percentage is the weight ratio of the aforementioned paste. Al σ < Binder, such as polyacrylate, carboxymethyl

46 6 78 9 V. Description of the invention (5) The blending amount of the base cellulose or polytetrafluoroethylene for nickel hydroxide is preferably 1-5 weight percent. The types of the aforementioned conductive current collector substrate include a nickel metal mesh, a foamed nickel metal mesh, and a nickel metal fiber board. (3) Release paper: The release paper used in this preferred embodiment is, for example, a nonwoven fabric made of nylon nonwoven fabric, a blend of nylon fiber and polypropylene fiber, or a polypropylene fiber nonwoven fabric, polypropylene and polyethylene nonwoven fabric, etc., in which the surface is hydrophilic Polypropylene is particularly suitable as a separator for nickel-metal hydride batteries, and the thickness of the separator is preferably 0.1 to 0.2 mm. (IV) Electrolyte: Generally used electrolytes such as a mixed solution of potassium hydroxide and lithium hydroxide, a mixed solution of sodium hydroxide and sodium hydroxide, a mixed solution of hydroxide discharge, a mixed solution of sodium hydroxide and sodium hydroxide In this preferred embodiment, in order to take into account both the temperature range used by the battery and its charging efficiency at high temperatures, a mixed solution of potassium hydroxide, hydrogen peroxide and sodium hydroxide is preferred, but this mixed electrolyte The problem of too low discharge voltage will be caused at high current. The present invention is improved by adding metal salts. Such metal salts may include chromate, molybdate, tungstate, hafnium oxide, hafnium oxide, oxidation, etc. The present invention is mainly based on tungstate, which contains tungstic acid, lithium tungstate, sodium tungstate, potassium tungstate and the like. The amount of each component of the electrolyte mentioned above is shown below:

ON S Potassium hydroxide (KOH) concentration S 8N ON S Sodium hydroxide (NaOH) concentration $ 8N ON S Lithium hydroxide (LiOH) concentration S 3N

466 789 V. Description of the invention (6) ON S tungstic acid (as proved by the above methods, its charging efficiency and refer to Tables I, II and Epicate, the purpose of which is not only the charging efficiency of the case, Table II In comparison, the conventional structure can be compared with the rising time of the present invention (here, 45 ° C is the product. Table 3 shows that after this, it is left to stand at 60 ° C for three times, and its residual rate is much higher than the solution composition and preparation. Effectively summing up, the present 'not only has a new design with practical effects, but also the elements of the invention of the patent law, the members of the review in detail, and # the above content and good practice examples' Dafanzhi made various changes and modifications Brief description of the drawing number: 1 Secondary battery 2 0 The positive electrode salt concentration formed by the battery increases the moonlight after charging and can reduce the reference value invention at room temperature and the conventional junction of the day after tomorrow. Ji Yi had already learned this technique in accordance with the law, and should still ^ 3N experimental secondary charge residues can be seen in the temperature-derived temperature drop (not too much here). Indicates that the species is excellent Different technical ideologies and advancements have been filed for quasi-patent applications. The people of the graphic arts of the examples include the battery structure. The elongation rate is more than the range used in the present invention, and the lift voltage is too low. The temperature is 25 ° C. The reference difference; however, it is obviously better than the battery in the battery charge and residual rate, from the table shows its high self-discharge effect of the high-temperature characteristics of the second high degree of creativity and improvement, and it is done. For this, I would like to express my sincerity. This issue 'according to the patent scope of the present invention actually test the height, please enter the value of the tungsten rise to the temperature to eliminate the value), the electrical saturation used for temperature improvement can be seen, can not pass the secondary battery before the full compliance with the spirit of your review 10 Battery negative electrode 3 0 separator paper page 9 4 6 6 78 9 V. Description of the invention (7) · 4 0 Electrolyte diagram brief description: Table 1. Proportion of electrolyte components in the present invention and conventional secondary batteries Table 2. Comparison of the charging efficiency of the present invention and the reserved secondary battery at different temperatures. Table 3. Comparison of the charging efficiency of the invention and the conventional secondary battery after the battery is saturated and left at 60 ° C for three days. Residual charge Rate.

Page 10 4 6 6 789 Brief Description of Drawings The first drawing is a schematic structural diagram of a secondary battery of the present invention.

Page 11

Claims (1)

4 6 June 0 Amendment / Correction / Supplement 6. Scope of Patent Application1. A high-performance and high-efficiency secondary battery, which includes a positive-electrode structure, which is located on a current collector substrate, which can charge nickel hydroxide particles The conductive material and the paste are filled on the conductive substrate; a negative structure is located on the current collector substrate, which can fill the absorbing alloy metal, the conductive material and the paste on the conductive substrate; a release paper, which is It is located inside the secondary battery and can isolate the positive and negative electrodes. An alkaline electrolyte is located inside the secondary battery. It is characterized in that the composition of the alkaline electrolyte is potassium hydroxide (KOH) and sodium hydroxide (NaOH). ) And a tungstic acid mixed solution with lithium hydroxide (L i 0H). The tungstic acid mixed solution includes lithium tungstate, sodium tungstate, potassium tungstate, and the like. 2. The high-performance and high-efficiency secondary battery according to item 1 of the patent application scope, wherein the concentration of the electrolyte is: ON S potassium hydroxide (K0H) concentration S 8N ON S 钠 sodium oxide (NaOH) concentration S 8N ON S hydrogen Lithium oxide (LiOH) concentration S 3N 0 NS Tungstate concentration S 3 N. 3. The high-performance and high-efficiency secondary battery according to item 1 of the scope of the patent application, wherein the nickel hydroxide particles in the positive electrode structure have zinc and cobalt in the nickel hydroxide particles, respectively, with respect to the nickel hydroxide at 1.5-5. 0, 1 Structure of 0—5.0 weight percent co-precipitated with metallic nickel. 4. The high-performance and high-efficiency secondary battery according to item 1 of the scope of patent application, wherein the average particle diameter of the nickel hydroxide of the positive electrode structure is 5-30 / zm, and the specific surface density is 2.0-3. 3g / cm3. . 5. If the high-performance and high-efficiency secondary battery in item 1 of the patent application scope, Page 12 4 6 6 789 6. In the scope of patent application, the specific surface area of nickel hydroxide in the cathode structure is 8-2 5 m 2 / g. 6. The high-performance and high-efficiency secondary battery according to item 1 of the patent application, wherein the shape of the nickel hydroxide of the positive electrode structure is spherical. 7 • The high-performance and high-efficiency secondary battery of item 1 in the scope of patent application, in which the conductive material is composed of metallic cobalt, hydroxide, and monoxide. 8. The high-performance and high-efficiency secondary battery according to item 1 of the patent application scope, wherein the conductive current collector substrate is a nickel foam net or a nickel-gold local fiberboard. 9 · If the high-performance and high-efficiency secondary battery in item 1 of the patent application scope, wherein the anode structure contains a reversible hydrogen-absorbing and desorbing hydrogen-absorbing alloy metal as the active material, this hydrogen-absorbing alloy is expressed by the general formula: L m N i aC o bM n CA 1 dZ re where L m is a rare earth element mixture containing La, and a, b, c, d, e are their atomic ratios, and the upper and lower limits of their total values are 5.0 and 5. 50, that is, 5.00 ^ a + b + c + d + e ^ 5.50 ° I 0. For example, the high-performance and high-efficiency secondary battery of item 9 in the scope of patent application, wherein the general formula is 1 ^ 1 ^ / 〇1 ^ In the 11 (^ 1 (^ 1'6 ^) absorbing alloy, it is composed in the following manner: 4.09 S a ^ 4. 50 0.38 ^ b ^ 4. 50 0.20 ^ c ^ 0. 31 0.31 ^ d ^ 0. 41 0.001 ^ e ^ 0. 01 »II · If the high-performance and high-efficiency secondary battery of item 1 of the patent application scope, Page 13 4 6 6 78 9 6. In the scope of patent application, the conductive material is composed of metal nickel, carbon black, and graphite. 1 2 · If the high-performance and high-efficiency secondary battery of item 1 of the patent application scope, wherein the conductive current collector substrate is a nickel foam net or perforated nickel-plated stainless steel (NPPS). Page 14