Analysis of the failure mechanisms in magnesiummanganese dioxide dry cells

✍ Scribed by S.R. Narayanan

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 441 KB
• Volume: 34
• Category: Article
• ISSN: 0378-7753
• DOI: 10.1016/0378-7753(91)85019-s

✦ Synopsis

Fadure of high-energy magnesium-manganese dioxide dry cells is charactensed by loss of ampere hour capacity on storage, increase of voltage delay, and anode corrosion The present investigation of the degradation of cell performance suggests several underlying mechanisms The important ones have been identified as redistribution of electrolyte in the cathode, breakdown of the passive film on the anode, and corrosion at bi-metallic interfaces formed by cell components These degradation processes tend to increase cell internal resistance, thereby reducing capacity output and increasing voltage delay An analysis of the dependence of ampere hour capacity and voltage delay on internal resistance of the cell has also been presented 1 . Introduction