| 摘要 |
PROBLEM TO BE SOLVED: To improve charge/discharge cycle life characteristics and a shelf life by including chelate polymer in at least one of a positive electrode, a negative electrode and an isolation body. SOLUTION: A positive electrode 10 is formed by covering positive electrode mix 1 on a positive electrode collecting body 6. The positive mix 1 contains LiCoO2 as a positive electrode active material, graphite powder as conductive agent, iminodiacetic acid chelate resin as a chelate polymer, and polyvinylidene fluoride as a binding agent, respectively. This positive mix 1 is mixed with an electrolyte formed by dissolving hexafluorolithium phosphate as a solute to a mixed solvent composed of propylene carbonate, etc., to term a slurry and applied to the positive electrode collecting body 6 composed of Al. An iminopropyonic acid chelate resin can be used as the chelate polymer besides the above. It is preferable that the content in the positive mix 1 is 1-10 wt.% Ti and stainless steel can be used for the positive electrode collecting body 6 besides Al. |
