Lead-Acid Battery Discharge

Pb + PbO2 + 2H2SO4 → 2PbSO4 + 2H2O

개요

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.

참여 물질

역할 물질 계수 상태
반응물 Lead Pb 1 (s)
반응물 Sulfuric Acid H₂SO₄ 2 (aq)
생성물 Water H₂O 2 (l)

일상 속 예시

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

산업적 중요성

자동차 시동용 배터리(SLI), 지게차, UPS(무정전 전원 장치), 태양광 에너지 저장 시스템에 광범위하게 사용됩니다. 낮은 비용과 우수한 전류 공급 능력이 장점입니다.

성질

유형
Electrochemical
가역 반응
예
에너지
발열
ΔH
-359.0 kJ/mol

관련 반응

Electrolysis of Water Electrolytic Production of Chlorate Electrorefining of Copper Alkaline Battery Discharge Anodizing of Aluminum Cathodic Protection (Zinc Sacrificial Anode) Chlor-Alkali Electrolysis Chrome Electroplating Nickel-Metal Hydride Battery Electrochemical CO₂ Reduction to CO

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.