Battelle-Geneva's Pioneering Work On NiMH, 1967
The pioneering work on NiMH batteries - essentially based on sintered Ti2Ni+TiNi+x alloys for the negative electrode and NiOOH-electrodes for the positives - was performed at the Battelle Geneva Research Center starting after its invention in 1967: The development work was sponsored over nearly 2 decades by Daimler-Benz Comp./Stuttgart and by Volkswagen AG. within the framework of Deutsche Automobilgesellschaft. The batteries showed high energy and power densities up to 50 Wh/kg, 1000 W/kg and a reasonable cycle life of 500 cycles. - Patent applications were filed in European countries (priority: Switzerland), USA and Japan and the patents transferred to Daimler-Benz Comp./Stuttgart. - Ref: Elektrode zur Speicherung und Aktivierung von Wasserstoff", K.D. Beccu, Battelle-Geneva, CH Priority Application No. 6333/67-Bb3/CH/2 - (2.05.1967), Patent: DE 2317505 C2 (18.10.73). Negative electrode of Ti-Ni alloy hydride phases, US patent US 3,669,745 (06/13,1972), inventor: K.D. Beccu, Ph.D, Battelle-Geneva R&D Center. See also NiMH batteries
The "invented NiMH variation" of Mr. Ovshinsky consisted in special alloys with disordered alloy structure and specific multicomponent alloy compositions. This variation made possible to increase the battery performance, i.e. the energy density, the cycle life and other characteristics.
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