Lead-Acid Battery Discharge

Pb + PbO2 + 2H2SO4 → 2PbSO4 + 2H2O

概述

During discharge, lead is oxidized to PbSO₄ at the anode while PbO₂ is reduced to PbSO₄ at the cathode, consuming sulfuric acid and producing water. The cell voltage is about 2.1 V, and six cells in series give the standard 12.6 V car battery. Invented by Gaston Planté in 1859, it remains the world's most recycled product.

参与者

角色 物质 系数 状态
反应物 Lead Pb 1 (s)
反应物 Sulfuric Acid H₂SO₄ 2 (aq)
产物 Water H₂O 2 (l)

日常示例

The 12V battery that starts your car every morning uses this exact lead-acid chemistry, invented over 160 years ago.

工业重要性

铅酸蓄电池市场规模达450亿美元，是汽车启动、UPS备用电源和通信基站的主流储能技术，可回收率高达99%，是世界上回收率最高的工业品。

属性

类型
Electrochemical
可逆
是
能量
放热
ΔH
-359.0 kJ/mol

相关反应

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Frequently Asked Questions

What is the equation for Lead-Acid Battery Discharge?
The balanced equation is: Pb + PbO₂ + 2H₂SO₄ → 2PbSO₄ + 2H₂O.
What type of reaction is Lead-Acid Battery Discharge?
Lead-Acid Battery Discharge is a electrochemical reaction. It is reversible under certain conditions.
Is Lead-Acid Battery Discharge exothermic or endothermic?
Lead-Acid Battery Discharge is exothermic (releases energy). The enthalpy change (ΔH) is -359.0 kJ/mol.