Lithium/Selenium Secondary Battery for Implantation.

摘要

A lithium/selenium battery is being developed as an implantable power source for an artificial heart or heart-assist device. Tests of 7.5-cm dia single cells operating at about 370C with a paste electrolyte consisting of LiF-LiCl-LiI and LiAl02powder,have yielded energy densities exceeding 0.76 W-hr/sq cm at an average voltage above 1.7 V. This performance is sufficient to permit the construction of a 10-W, 120 W-hr battery weighing about 1.1kg. An unsealed battery test demonstrated that a battery of five 7.5-cm dia lithium/selenium cells will be capable of at least 12 W of power. In addition, a sealed lithium/selenium battery was operated in an air environment and was found to be relatively insensitive to motion as well as orientation. Further work is needed on the development of sealed cells and batteries,on increasing the battery power level to 30 W,and on increased cell life. (Author)