What are the consequences of copper mixing into the battery cathode?

The consequence of copper mixed into the cathode material of lithium cobalt oxide battery is that it is directly scrapped.

A reduction reaction occurs at the positive electrode in the galvanic cell.

Due to the reaction between the negative electrode and the electrolyte of the galvanic battery, the negative electrode material loses electrons, so the negative electrode is a reducing agent.

An oxidation reaction occurs.

The positive electrode of the galvanic cell gets electrons, and the electrons protect the positive electrode so that the positive electrode does not react with the electrolyte, so the electrons will interact with the positive ions in the solution.

combined, so the positive ions around the cathode gain electrons, which are oxidants, and a reduction reaction occurs.

Primary batteries

Through redox reactions.

The device that generates an electric current is called a galvanic battery, which can also be said to combine chemical energy.

A device that converts into electrical energy. Some galvanic cells can constitute a reversible battery, while others are not. When the galvanic battery is discharged, the negative electrode undergoes an oxidation reaction and the positive electrode undergoes a reduction reaction.

For example, copper-zinc primary batteries, also known as Daniel batteries, have a positive electrode of copper, which is immersed in copper sulfate solution; The negative electrode is a zinc plate, immersed in a zinc sulfate solution. The two electrolyte solutions are connected by a salt bridge, and the two poles are connected by wires to form a galvanic cell. Dry cell batteries for everyday use.

It is made according to the principle of galvanic cells.

The above content reference:Encyclopedia – galvanic batteries

In galvanic battery cathode, the chemical reaction that takes place is a redox reaction.

Electrons flow out from one pole where the oxidation reaction occurs, and the substance that acts as a negative electrode and loses electrons is a reducing agent. Electrons flow to the positive electrode through the negative electrode of the galvanic cell through the wire, and the electrons are obtained by oxidizing the agent on the positive electrode, and a reduction reaction occurs. Galvanic cells convert chemical energy into electrical energy through chemical reactions.

Judgment of positive and negative electrodes of galvanic batteries

1) According to the electrode material: the more active one is negative, and the less active one is positive (electrons are lost by reacting with the electrolyte).

2) The reaction that occurs according to the two poles: the one pole where the oxidation reaction occurs is negative, and the one pole where the reduction reaction is positive.

3) According to the electrode weight gain or loss: the pole that dissolves or decreases is negative, and the pole that increases or releases bubbles is positive; (Lead-acid battery (PB-PBO2) can be used as a classic special case: when discharged, because the positive electrode PBO2 changes to PBo4 after the reaction, and the negative electrode PB also changes to PBSO4 after the reaction, the weight increases, and the solution solute H2SO4 decreases.)

4) According to the direction of electron or current flow: current direction: positive and negative electron flow direction: negative positive.

Summary. Hello, for your question, my yes, because the electron loss in the battery is the negative electrode, and the electron gain is the positive electrode, zinc is more active than copper, and it is volatile electrons, so copper is the positive electrode and zinc is the negative electrode.

Hello, for your question I is, because the battery is the negative electrode that loses electrons in the first bend, and the electrons are positive, zinc is more active than copper, and it is easy to lose electrons.

I hope mine is slim enough to help you. If you are satisfied with my satisfaction, I hope you can give me a thumbs up after the consultation Your thumbs up is my biggest motivation. Have a great day and thank you for your inquiry.

Good. I hope mine is slim enough to help you. If you are satisfied with my satisfaction, I hope you can give me a thumbs up after the consultation Your thumbs up is my biggest motivation. Have a great day and thank you for your inquiry.

Question 1: What reactions occur between the positive and negative electrodes of the battery, don't say it's a redox reaction What reactions occur between the positive and negative electrodes of the battery, don't say it's a redox reaction.

Cathode: A reduction reaction occurs. Negative Pole:

An oxidation reaction occurs. For example: Cuzn(H2SO4)galvanic cell) positive electrode (Cu):

2H+ +2E-= H2 ( ) Reduction Reaction) Negative Electrode (Zn): Zn-2E- =Zn2+ (Oxidation Reaction) Total Reaction: Zn + 2H+ =Zn2+ +H2 ( ) Formula:

Negative oxygen is also returned! Question 2: What happens to the positive and negative electrodes of the battery The positive electrode undergoes oxidation reaction.

The negative electrode undergoes a reduction reaction.

Question 3: How to judge the reaction of the positive electrode of the battery (any battery is counted) Galvanic battery: look at who is oxidized and who is reduced in the total reaction, and the negative electrode that is oxidized is the positive electrode.

Electrolytic cell: Again, look at who is oxidized and who is reduced in the total reaction, the oxidized anode (connected to the positive electrode of the external power supply) and the reduced anode (connected to the negative electrode of the external power supply).

When writing, after determining the reduced substance, look at what is missing from the product on the right side of the total reaction, what is missing, what is missing from the left side of the total reaction, or what is found in the solution (generally H2O, OH-, H+).

That's all there is to put into words.

Lithium as the negative electrode will cause a short circuit due to the growth of crystal branches.

A: 1Both are used as current collectors because they have good conductivity and a softer texture (which may also be good for bonding).

It is also relatively cheap, and both can form an oxide protective film on the surface. 2.The oxide layer on the surface of copper and nickel belongs to the semiconductor, the electron is on, the oxide layer is too thick, and the impedance is large; The oxide layer on the surface of aluminum is an insulator, and the oxide layer cannot conduct electricity, but because it is very thin, the electronic conductivity is realized through the tunnel effect, and if the oxide layer is thick, the conductivity of the aluminum foil is poor, and even insulation.

Generally, it is best to clean the surface of the current collector before use, on the one hand, to wash away the oil stains, and at the same time to remove the thick oxide layer. 3.The cathode potential is high and the thin aluminum oxide layer is very dense to prevent oxidation of the current collector.

The copper-nickel foil oxide layer is looser, in order to prevent its oxidation, the potential is relatively low, and it is difficult to form a lithium-intercalated alloy with Cu nickel at low potential, but if the surface of copper-nickel is oxidized in large quantities, Li will react with copper-nickel oxide under a slightly higher potential. Aluminum foil cannot be used as a negative electrode, and lial alloying occurs at low potentials. 4.

The current collector requires pure composition. The impurity of the composition of Al will lead to pitting corrosion due to the lack of density of the surface, and even more due to the destruction of the surface **, resulting in the formation of LIAL alloy.

In the electrolytic cell, the device is an electrical appliance, subject to the connected power supply, and the electrode connected to the positive electrode of the power supply plays an oxidation effect, that is, ions or molecules lose electrons, which is different from galvanic batteries.

Cathode: An electrode connected to the negative pole of the power supply. (The electrons are reduced).

Anode: An electrode connected to the positive terminal of a power supply. (Oxidation reaction occurs when electrons are lost).

In physics, the positive electrode refers to the end of the power supply with a higher potential (electric potential), as opposed to the negative electrode.

In electrochemistry, the usage habits of physics are followed. In galvanic batteries, the device is the power supply, and the electrode from which the current flows out has a high potential, which is the positive electrode, and the electrode plays a reducing role, that is, ions or molecules get electrons; In the electrolytic cell, the device is an electrical appliance, subject to the connected power supply, and the electrode connected to the positive electrode of the power supply plays an oxidation effect, that is, ions or molecules lose electrons, which is different from galvanic batteries.

Electrode reaction. The electrode that reacts and is connected to the positive electrode of the power supply is called the anode.

The substance loses electrons on the anode and an oxidation reaction occurs. As shown in the above figure, Cl- loses electrons on the anode and converts to Cl2, and the anode reaction formula: 2Cl- -2E-=Cl2 is abbreviated as cation oxygen.

The electrode connected to the negative electrode of the power supply becomes the cathode.

The substance gets electrons on the cathode and the reduction reaction takes place. As shown in the above figure, Cu2+ is converted into Cu at the cathode, and the cathode reaction formula: Cu2++2E- Cu is abbreviated as the cathode (cathodi).

Electrolysis results. New matter is formed at the poles.

We specify that the electrode where the oxidation reaction takes place is the anode, and in electricity it is specified that the direction of the current is opposite to the direction of the electron's motion, and the current flows from the positive electrode to the negative electrode.

In the electrolytic cell, an oxidation reaction takes place at the anode, and the electrons obtained during the oxidation reaction are provided by the power supply. So the anode is the positive electrode.

The positive electrode and the negative electrode are judged according to the electric potential, the high electrode is the positive electrode, and the low electrode is the negative electrode;

The anode and cathode are judged by redox, the oxidation reaction is the anode, and the reduction reaction is the cathode;

In the electrolytic cell: the oxidation reaction occurs when it is connected to the positive electrode, so it is the anode; The reduction reaction that is connected with the negative electrode is the cathode;

In galvanic cells: the electron outflow of the electron oxidation reaction occurs, which is the anode, the electric potential is low, and it is the negative electrode; The electrode where the electrons flow undergoes a reduction reaction, which is the cathode with high electric potential and is the positive electrode.

The positive charge is from high to low potential, and electrons are from low to high potential.

The principle of charging is the galvanic battery.

The negative electrode material loses electrons and an oxidation reaction occurs. When the valency increases, the cathode material gains electrons, and the principle of reducing reaction discharge is the electrolytic cell.

If the anode material is an active electrode, the anode material will lose electrons when discharged, and the reciprocal oxidation reaction will increase. The cathode material does not react with either active or inert electrodes, but the cation discharge in the electrolyte solution AG+>HG+>Cu2+>H+>Pb2+>SN2+Fe2+>Zn2+>Al3+>Mg2+>Na+>Ca2+>K+, that is, if there are Cu2+ and Zn2+ in the solution, Cu2+ is discharged first, and Zn2+ is discharged after Cu2+) If the anode material is an inert electrode, it is a cation discharge in solution, then (S2->I->Br->Cl-> is not the most ** oxygenated acid heel (such as chloric acid heel, nitrite heel) >OH->oxygenate group" F-).

It's so awkward!