NICKEL HYDROGEN SECONDARY BATTERY

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PROBLEM TO BE SOLVED : To provide a nickel hydrogen secondary battery capable of achieving both excellent high rate discharge characteristics and excellent cycle life characteristics. SOLUTION : A nickel hydrogen secondary battery 2 includes : an electrode group 22 consisting of a positive electrode 24 and a negative electrode 26 which are superposed on each other through a separator 28; and an outer package 10 in which the electrode group 22 is housed in a sealed state together with an alkaline electrolyte. The negative electrode 26 contains a hydrogen-storing alloy and fluoride of rare earth elements. SELECTED DRAWING : Figure 1 COPYRIGHT : (C)2016, JPO&INPIT