Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Include electrolyte chemically specified and method
Patent
1991-08-23
1992-10-06
Skapars, Anthony
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Include electrolyte chemically specified and method
429218, H01M 1040
Patent
active
051530821
ABSTRACT:
A nonaqueous electrolyte secondary battery includes a positive electrode of vanadium pentoxide, a negative electrode of lithium-doped carbonaceous material, and an organic electrolyte liquid containing a lithium salt. The electric capacities of the positive and negative materials are selected such that the electric capacity of the carbonaceous material at a potential of 1 volt or lower vs. lithium counter electrode is 0.8 to 1.8 times the electric capacity of vanadium pentoxide at a potential of 2.5 volts or higher vs. lithium counter electrode. Graphitized mesophase microspheres resulting from carbonization of pitch is preferred carbonaceous material. The battery is improved in both charge/discharge cycle and overdischarge properties.
REFERENCES:
patent: 4615959 (1986-10-01), Hayashi et al.
patent: 4668595 (1987-05-01), Yoshino et al.
Kawagoe Takahiro
Kijima Shigeru
Maeda Yuko
Miyazaki Tadaaki
Ogawa Masao
Bridgestone Corporation
Skapars Anthony
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