A study of the effects of compression on the performance of the positive active mass in lead-acid cells using absorptive glass mat separators

A new electrochemical cell was designed and constructed to enable in situ m easurements of the performance and internal resistances of lead-acid test e lectrodes in a vertical position during cycling at well-defined degrees of compression. The AGM separators used were combined with microporous paper s eparators to prevent short-circuiting by conducting bridges of lead dioxide . The test cells were subjected to pressures in the range 0-8 N/cm(2); the compression decreased the positive active mass resistance and increased its cycle life. (C) 1999 Elsevier Science S.A. All rights reserved.