DEVELOPMENT OF LECLANCHE BATTERIES WITH IMPROVED STORAGEABILITY
Abstract
Various types of separators were tested for 12 mo at 113 deg F. None of the samples appeared to be more resistant to oxidation than either the corn or potato starch. Studies showed that the greatest part of the voltage reduction of MnO sub 2 caused by contact with a starch separator is due to the presence of a soluble material, in the initial starch or to the formation of such a material by the acid action of the electrolyte on the starch. The best inhibitors, with respect to the polarization of Zn, were determined to be Antaron R-155, (NH sub 4) sub2 Cr sub2 O sub7, (NH sub4) sub2CrO sub4, NA sub2 Cr sub2 O sub7.2H sub2 O, and a mixture of Na sub2 Cr sub2 O sub7.2H sub2 O and Antaron R-155. However, the chromate film resulted in a high anodic polarization. For cells stored at elevated temperatures, best results were obtained by using a chromate inhibitor in the paste and BaCrO sub4 as a reservoir for chromate ions in the depolarizer itself. Data were obtained which indicated that cells fabricated from methyl cellulose-coated paper liners, polyethylene gaskets as subseals, and heat- resistant polystyrene top seals had met the storage capacity requirements of 130 deg F, 50% RH and 160 deg F, 50% RH.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1953
- Accession Number
- AD0020075