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Anonymous users2024-02-15The galvanic battery uses zinc as the negative electrode, manganese dioxide as the positive electrode, and potassium hydroxide solution as the electrolyte. Abbreviated as alkaline manganese battery, commonly known as alkaline battery.
The most popular alkaline manganese batteries are cylindrical and button-shaped, in addition to square and flat varieties. The shell of the cylindrical cell (see picture) is a nickel-plated steel shell with a cathode cap, which doubles as a cathode collector. In close contact with it inside the shell is a cathode ring (cathode) made by pressing electrolytic dioxide, graphite and carbon black
The middle is filled with zinc paste made of zinc powder and gel lye, i.e. anode glue (anode), which is interpolated with a brass current collector. The positive and negative electrodes are isolated by alkali-resistant isolation tubes. The negative current collector is welded to the negative cap and inserted into the plastic seal.
This assembly is inserted into the steel shell and crimped and sealed, and the steel shell is wrapped with a heat shrinkable film trademark to become a commercial battery. The structure and size specifications of the button alkaline manganese battery are basically the same as those of the zinc-silver button battery. Alkaline zinc-manganese battery.
Typical formulation (mass) of active material in the battery: cathode electrolytic manganese dioxide 90 92 , graphite powder 8 9 , acetylene carbon black; The negative electrode is 88 90 zinc powder amalgamation, 5 7 zinc oxide, 3 4 CMC sodium salt, KOH solution (add) appropriate amount. The electrolyte is 8 12N KOH solution, in which an appropriate amount of zinc oxide is dissolved.
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Anonymous users2024-02-14Reaction of alkaline zinc-manganese dry cell (followed by acid zinc-manganese dry cell reaction).
The cathode reacts with cathode:
mno2＋h2o＋e→mno(oh)＋oh－
MNO(OH) has a certain solubility in alkaline solutions.
mno(oh)＋h2o＋oh－→mn(oh)4－
mn(oh)4－＋e→mn(oh)42－
The negative electrode is the reed reaction of the abutment of the plexus:
zn＋2oh－→zn(oh)2＋2e
zn(oh)2＋2oh－→zn(oh)42－
The total battery response is:
Zn garter mNO2 2H2O 4oh mn(OH)42 zn(OH)42
Acid zinc-manganese dry cell reaction:
The cathode is cathode, and manganese is reduced from tetravalent to trivalent.
2mno2＋2h2o＋2e→2mno(oh)＋2oh－
The negative electrode is the anode, and the zinc is oxidized to divalent zinc ions:
zn＋2nh4cl→zn(nh3)2cl2＋2h＋＋2e
The battery reaction of the total Zheng La is:
2mno2＋zn＋2nh4cl→2mno(oh)＋zn(nh3)2cl2
Lead sulphate battery electrode reaction:
1) The total reaction formula of the battery is: PB+PBO2+4H++2SO42-=2PBSO4+2H2O, and the electrode reaction is written as: negative electrolysis reaction:
PB-2E-+SO42-=PBSO4, positive electrode reaction: PBO2+2E-+4H++2SO42-=PBSo4+2H2O, according to the electrolysis reaction and battery principle.
2) The device is an electrolysis device, and the connection B is the anode, which should lose electrons and undergo oxidation reaction.
A is the cathode, which is the reduction reaction of the electrons obtained.
So it's a lead-acid battery.
The electrolytic reaction of lead sulfate at the two electrodes is analyzed according to the principle of electrolysis.
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Anonymous users2024-02-13The positive electrode reaction: mNO2+H++E-mNO(OH), the negative reaction: Zn+2NH4Cl+2E-Zn(NH3)2Cl2+2H+, and the total cell reaction is 2mNO2+Zn+2NH4Cl 2mNO(OH)+Zn(NH3)2Cl2.
Acid zinc-manganese dry battery Acid zinc-manganese battery is to use zinc cartridge as the negative electrode, and after amalgamation treatment, the surface properties are more uniform, so as to reduce the corrosion of zinc and improve the storage performance of the battery, the cathode material is a mixed paste composed of manganese dioxide powder, ammonium chloride and carbon black, and a carbon rod is inserted in the middle of the cathode material as a conductor to draw out the current.
Reaction principle of zinc-manganese dry battery
It should be noted that the main working principle of zinc-manganese dry battery is that the redox reaction is realized in a closed loop! (Very similar to galvanic batteries, that is, chemical energy is converted into electrical energy), for example: the electrode reaction formula of alkaline zinc-manganese dry battery is:
zn+2mno2+2nh4cl= zncl2++mn2o3+2nh3+h2o。
The cylinder made of metal zinc skin, that is, the negative electrode, the battery discharge is the electrolysis reaction of ammonia chloride and zinc, and the released charge is conducted by graphite to the positive carbon rod, and the electrolysis reaction of zinc will release hydrogen. However, if the battery works continuously or is used for too long, the manganese dioxide will be too late or nearly saturated and unable to absorb it again.
The above content refers to Encyclopedia - Acid Zinc Manganese Dry Battery.
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Anonymous users2024-02-12Alkaline zinc-manganese batteries use zinc as the negative electrode.
Alkaline zinc-manganese battery is a battery made of zinc as the negative electrode, manganese dioxide as the positive electrode, sodium hydroxide or potassium hydroxide as the electrolyte, and adopts a reverse polarity structure. The potassium hydroxide solution is the galvanic cell of the electrolyte. Abbreviated as alkaline manganese battery, commonly known as alkaline battery.
Its product range is indicated by the letters "LR", followed by the number indicating the model number of the battery.
The alkaline manganese battery, which was first patented in Germany, is a kind of wet battery. In 1912, another dry cell was patented in Germany. It was not until 1949 that the "Crown" type battery of Yuehua Company of the United States was put on the market.
After the successful development of the cylindrical structure in 1960, the alkaline manganese battery was able to develop rapidly.
Alkaline zinc-manganese battery is an upgraded high-performance battery product of ordinary dry battery, with two product batteries: LR6 (No. 5) and LR03 (No. 7). The products are divided into ordinary type (mercury content and micro mercury content) (the mercury content is not high, and the trial production of mercury-free batteries is being carried out.
Whether it is for civilian or military use, primary alkaline zinc-manganese batteries are mainly used as a portable power source. Ordinary zinc-manganese batteries have poor continuous working capacity at high current, while alkaline zinc-manganese relaxation can work continuously at high current, which is most suitable for equipment that requires high current power supply, such as cameras, field cameras, radio-controlled model airplanes and sea models, power tools, electric toys, tape recorders, etc.
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Anonymous users2024-02-11Alkaline zinc is a group of crude manganese batteries that rot in the town of Sensui.
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Anonymous users2024-02-10The cathode reacts with cathode:
Mno2 H2O e Mno(OH) OH Mno(OH) has a certain solubility in alkaline solution.
mno(oh)＋h2o＋oh－→mn(oh)4－mn(oh)4－＋e→mn(oh)42－
The negative electrode is the anodic reaction:
zn＋2oh－→zn(oh)2＋2e
Zn(OH)2 2OH ZN(OH)42 The total cell response is:
zn＋mno2＋2h2o＋4oh－→mn(oh)42－＋zn(oh)42－
Acid zinc-manganese dry cell reaction:
The cathode is cathode, and manganese is reduced from tetravalent to trivalent.
2mNO2 2H2O 2E 2mNO(OH) 2OH The negative electrode is the anode, and the zinc is oxidized to divalent zinc ions:
The total cell reaction of Zn 2NH4Cl Zn(NH3)2Cl2 2H2E is:
2mno2＋zn＋2nh4cl→2mno(oh)＋zn(nh3)2cl2
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Anonymous users2024-02-09Alkaline zinc-manganese battery The zinc-manganese battery uses alkaline substances such as potassium hydroxide aqueous solution as the electrolyte, which is an improved type of neutral zinc-manganese battery. Electrolytic manganese dioxide is used as the positive active substance, mixed with conductive graphite powder and other materials and pressed into a ring, and zinc powder is used as the negative active substance, mixed with electrolyte and gelling agent to make paste. The structure is opposite to the neutral zinc-manganese battery, the negative electrode is inside, the positive electrode is outside, also known as the reverse pole structure, and the positive and negative electrodes are separated by special isolation paper.
Alkaline zinc-manganese batteries can also be made cylindrical, button-shaped or square according to the needs of electrical appliances. This kind of battery has superior high current and continuous discharge performance, higher capacity and better low temperature performance than ordinary zinc-manganese batteries, and is currently the civil primary battery with the highest performance ratio. It is especially suitable for continuous use of high current such as cameras and children's toys.
The electrochemical system is denoted by an "L". The following is the reaction of alkaline zinc-manganese dry cell (followed by acid zinc-manganese dry cell reaction).
2mno2＋zn＋2nh4cl→2mno(oh)＋zn(nh3)2cl2
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