Secondary cell and the producing method thereof
AssigneeSanyo Electric Co., Ltd.
InventorsNobuhiro Furukawa, Masahisa Fujimoto, Noriyuki Yoshinaga, Koji Ueno
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Abstract
The present invention discloses a secondary cell. The secondary cell comprises a positive electrode, a negative electrode which is made of a carbon material, and non-aqueous electrolytic solution, wherein the secondary cell is characterized in that the carbon material as the material of the negative electrode is produced by carbonizing natural high polymers.
Claims7
In a method of producing a secondary cell comprising a positive electrode, a negative electrode and a non-aqueous electrolytic solution, the improvement wherein the negative electrode is produced by a process which comprises carbonizing a natural polymer at a temperature of from 500.degree. C. to 1000.degree. C. to provide a carbon material having a crystal thickness Lc of 10 Angstroms or less when analyzed by x-ray diffraction, the negative electrode being formed from materials other than lithium metal.
In a method of producing a secondary cell comprising a positive electrode, a negative electrode and a non-aqueous electrolytic solution, the improvement wherein the negative electrode is produced by a process which comprises carbonizing a cellulose at a temperature of from 500.degree. C. to 1000.degree. C. to provide a carbon material having a crystal thickness Lc of 10 Angstroms or less when analyzed by x-ray diffraction, the negative electrode being formed from materials other than lithium metal.
Dependencies are inferred from the claim text.