Lithium battery

摘要

A lithium battery (1) including a positive electrode (10) containing low-crystallinity manganese dioxide having a specific surface area of 8 to 28 m2/g as a positive electrode active material, a negative electrode (11) containing metallic lithium or a lithium alloy as a negative electrode active material, and an organic electrolyte is provided. The lithium battery (1), due to said low-crystallinity manganese dioxide contained therein, has excellent storage characteristics at high temperatures of 100° C. or higher, large-current discharge characteristics, large-current pulse discharge characteristics, low-temperature discharge characteristics, and like characteristics, and in addition, is cost advantageous.

主权项

1. A lithium battery comprising a positive electrode, a negative electrode, and an organic electrolyte, wherein:
said positive electrode comprises low-crystallinity manganese dioxide having a specific surface area of 14 to 28 m2/g as a positive electrode active material, said low-crystallinity manganese dioxide has a ratio [I(110)/I(101)] of peak intensity I(110) of a diffraction peak for a (110) plane near 2θ=28° to peak intensity I(101) of a diffraction peak for a (101) plane near 2θ=37.5° of 0.5 to 0.58 in a powder X-ray diffraction pattern with CuKα radiation, said negative electrode comprises at least one selected from metallic lithium and lithium alloys as a negative electrode active material, and said low-crystallinity manganese dioxide comprises boron and a Group 2 element, said boron being contained in an amount of 0.3 to 1.4 wt % of a total amount of said low-crystallinity manganese dioxide.