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US 5,691,084 AGranted
Organic electrolytic solution secondary cell
AssigneeHitachi Maxell, Ltd.
InventorsFusaji Kita, Masaharu Higashiguchi, Kouji Murakami, Akira Kawakami
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AssigneeHitachi Maxell, Ltd.
InventorsFusaji Kita, Masaharu Higashiguchi, Kouji Murakami, Akira Kawakami
Estimating the term…
An organic electrolytic solution secondary cell having a positive electrode, a negative electrode and an organic electrolytic solution, wherein a solvent of the organic electrolytic solution contains a triester of phosphoric acid, and the negative electrode contains a carbonaceous material, further, the carbonaceous material of the negative electrode has the specific surface condition, and carbon dioxide is dissolved in the organic electrolytic solution, whereby safety and shelf stability of the cell are increased, and also cell properties such as the closed circuit voltage, the retention (difference between the charge capacity and the discharge capacity), the discharge capacity and so on are improved.
An organic electrolytic solution secondary cell comprising a positive electrode, a negative electrode and an organic electrolytic solution, wherein a solvent of said organic electrolytic solution contains a triester of phosphoric acid, and said negative electrode comprises a carbonaceous material, and wherein the ratio (I.sub.135 /I.sub.c) of peak intensity of phosphorus around 135 eV (I.sub.135) to a sum of peak intensities of carbon from around 284 eV to around 289 eV (I.sub.c) in an X-ray photoelectron spectroscopy on a surface of the negative electrode is at least 0.05.
Dependencies are inferred from the claim text.