Synthesis of carbon/EMD composite from carbon-suspended sulfuric acid and manganese sulfate bath
✍ Scribed by Gen-pei Piao; Masaki Yoshio; Hideyuki Noguchi; Akiya Kozawa
- Book ID
- 103899951
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 886 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0378-7753
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✦ Synopsis
A study has been made of the electrodeposition of MnOz on a titanium anode from a carbon or carbon/MnO, composite suspended in a H$O.,-MnS04 bath. Electrolytic manganese dioxide (EMD) containing acetylene black or vapour-grown carbon fibre shows excellent alkaline battery performance and good grindability. Nevertheless, passivation of the titanium anode sometimes occurs during electrolysis at a current density of 1 A dm-'. This problem is successfully resolved without loss of battery performance, by using carbon/ S-MnO, as suspension particles. Apart from producing EMDs with good grindability and excellent battery performance, this bath has several other advantages, namely: easy maintenance of the dispersion; good reproducibility; low anode potential during electrolysis, and higher carbon content. It is proposed that a close relationship exists between battery performance and the surface characteristics of EMDs such as BET surface area and pore size.