1. Voltaic battery: (negative electrode -Zn, positive electrode -Cu, electrolyte -H2SO4) Negative electrode: Zn–2e-==Zn2+ (oxidation reaction) Positive electrode: 2H++2e-==H2↑ (reduction reaction ) Ionic equation Zn + 2H+ == H2↑+ Zn2+ 2. Iron-carbon battery: (negative electrode—Fe, positive electrode—C, weakly acidic H2CO3 electrolyte) Negative electrode: Fe–2e-==Fe2+ (oxidation reaction ) Positive electrode: 2H+ +2e-==H2↑ (reduction reaction) ionic equation Fe+2H+==H2↑+Fe2+ (corrosion by hydrogen evolution) 3. Iron-carbon battery: (negative electrode - Fe, electrode positive - C, the electrolyte is neutral or alkaline) negative electrode: 2Fe–4e-==2Fe2+ (oxidation reaction) Positive electrode: O2+2H2O+4e-==4 (reduction reaction) Chemical equation 2Fe+O2 +2H2O==2Fe(OH)2 (oxygen absorbing corrosion) 4Fe(OH) 2+O2+2H2O==4Fe(OH)3 2Fe(OH)3==Fe2O3 +3 H2O (the rust formation process ) 4. Aluminum-nickel battery: (negative electrode -Al, positive electrode-Ni NaCl electrolyte, O2) Negative electrode: 4Al–12e-==4Al3+ (oxidation reaction) Positive electrode: 3O2+6H2O+12e-==12 (reduction reaction) chemical equation 4Al+3O2+6H2O ==4Al(OH)3 (marine light battery) 5. Ordinary zinc-manganese dry battery: (negative electrode-Zn, positive electrode-C, NH4Cl electrolyte, MnO2 paste) Negative electrode: Zn–2e-==Zn2+ (oxidation reaction) Positive electrode: 2MnO2+2H++2e-==Mn2O3+ H2O (reduction reaction) chemical equation Zn+2NH4Cl+2MnO2=ZnCl2+Mn2O3+2NH3↑ 6. Zinc-manganese alkaline dry cell: (negative electrode-Zn, positive electrode-C, KOH electrolyte, MnO2 paste) Negative electrode: Zn + 2OH– 2e-== Zn(OH)2 (oxidation reaction) Positive electrode: 2MnO2 + 2H2O + 2e-==2MnOOH +2 OH- ( reduction reaction) Chemical equation Zn +2MnO2 +2H2O == Zn(OH)2 + MnOOH 7. Silver-zinc battery: (negative electrode—Zn, positive electrode—Ag2O, NaOH electrolyte) Negative electrode: Zn+2OH––2e -== Zn (OH)2 (ox reactionydation) Positive electrode: Ag2O + H2O + 2e-== 2Ag + 2 OH- (reduction reaction)
My digital camera uses a dual Luter Powerful mercury-free alkaline battery, AA, 1.5V. The power is out now. I don't know much about batteries that can be charged with a charger.
| (1) ① In LiMnO 2, the element lithium has a valence of +1, and the valence of the element O is -2 < p>Suppose that Mn The valence of the element is > The solution is x=+3 So the answer is: +3; ② According to the principle operation, lithium reacts with MnO 2 to generate LiMnO 2. It can be seen that during discharge, lithium and diamine manganese oxide react to generate LiMnO 2. The equation for this battery reaction is Li+MnO 2 = LiMnO 2. So the answer is: Li+MnO 2 =LiMnO 2; ③Because of the battery During discharge, chemical energy is converted into energy electric. Charging and dischargingge are opposite processes, that is, electrical energy is. converted to chemical energy during charging. So the answer is: B. (2) In the expression "drawing firewood from the bottom of the cauldron", the method The fire extinguishing method described consists of isolating flammable materials. Fishermen use nets to catch fish, and the method they use is similar; to the filtration method in chemical laboratories. So the answer is: remove flammable materials; (3) Pb shows a +2 valency or a +4 valency in the compound. According to the principle according to which the algebraic sum of the valences is zero, write the two forms of Pb oxide as: PbO and PbO 2., then Pb 3. The oxide form of O 4 can be written 2PbO?PbO 2; the salt form can be written Pb 2 PbO 4. The answer is therefore: 2PbO?PbO 2 or Pb 2 PbO 4. |
Please provide reliable information on the equationon reaction of the positive and negative discharge electrodes of the lithium battery
I regret to tell you that this is not possible. Nickel cadmium batteries, nickel metal hydride batteries and lithium batteries, these three types of batteries can be recharged. Currently, most cell phones and other digital products use alkaline lithium-ion batteries. The structure and reactive materials of alkaline batteries are completely different from the former. The total chemical equation reflected is Zn+MnO2+2H2O+4OH-=Mn(OH)42-+Zn(OH)42-. It is not reversible and belongs to a disposable battery. There is a risk of leakage and explosion if the voltage is forcibly charged in reverse. I hope my answer will be useful to you and you can adopt it. Lithium batteries are a new generation of high-energy batteries that have been developed into a variety of lithium batteries (which have been widely usedused in the mobile phone industry).
The general reaction formula of a certain lithium battery is:
Li+ MnO2 == LiMnO2, about this battery,
NextThe statement following is correct
A When discharging, the reaction of the positive electrode: Li-e- == Li+
B When discharging, the reaction of the positive electrode negative: MnO2 + e- == MnO2-
C When the battery reacts, lithium is the positive electrode and manganese dioxide is the negative electrode
D When the battery reacts, the mixture changes from black to purple