Performance characteristics of Ultralife's solid polymer rechargeable batteries

Ultralife Batteries delivered the world's first commercial shipments of sol id polymer rechargeable batteries in 1997. The battery consists of a LixMn2 O4- based cathode, graphite anode and proprietary polymeric separator. Ener gy density of the batteries exceeds 120 W h kg(-1) and 200 W h dm(-3) at th e C rate. Pulse capability up to 5 C has been demonstrated. More than 90% o f the initial C rate capacity remains after 500 continuous cycles at room t emperature. These solid polymer rechargeable batteries also show good low a nd high temperature performance and have good safety characteristics. (C) 1 999 Elsevier Science S.A. All rights reserved.