To materialize a nonaqueous solvent secondary cell with a discharge voltage of 2.4 V, compatible with Ni/Cd secondary cell, with improved capacity characteristic at over charge and over discharge.
For a nonaqueous solvent secondary cell having a positive electrode with positive electrode binding agent of MoO3 as an active material, and a negative electrode with negative electrode binding agent containing Li occluding carbon material, the operation potential of the positive electrode is higher by 1.5 V and over against the standard unipolar potential of lithium at all times, and discharge is made to finish when the operation potential of the negative electrode starts to increase. Such nonaqueous solvent secondary cell fulfilling above condition can be manufactured by making the electric capacity ratio of the positive electrode binding agent and the negative electrode binding agent 1.05-1.20, and the effect is further improved by adding Na element to the positive electrode active material.
FUJIWARA AIICHIRO
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Next Patent: NONAQUEOUS ELECTROLYTE SECONDARY CELL