TY - GEN
T1 - Long cycle life rechargeable lithium/titanium disulfide cells
AU - Post, C. J.
AU - Takeuchi, E. S.
N1 - Publisher Copyright: © 1992 IEEE.
PY - 1992
Y1 - 1992
N2 - Lithium/titanium disulfide (Li/TiS2) cells are being developed for long life rechargeable applications. The effects of cathode thickness, packing density, percent carbon, electrolyte type, and anode type on cycle life were evaluated. Cathode thickness was found to have the most dramatic effect on cycle life, followed by cathode packing density and electrolyte type. The cycle life of AA Li/TiS2 cells increased substantially as the cathode thickness decreased. At 100% depth of discharge (DOD), over 600 cycles have been demonstrated at 500 mA discharge and 125 mA charge rates. At 50% DOD, 830 cycles have been achieved. AA cells have been discharged at rates up to 2.0 A while maintaining over 60% cathode utilization. Microcalorimetry experiments have been used to estimate a self-discharge rate of less than 1% per month for cycled cells at 25 degrees C. Safety testing indicates that fresh cells do not vent when crushed or externally short circuited but may vent after cycling. Heat tape tests showed that venting did not occur below 170 degrees C.
AB - Lithium/titanium disulfide (Li/TiS2) cells are being developed for long life rechargeable applications. The effects of cathode thickness, packing density, percent carbon, electrolyte type, and anode type on cycle life were evaluated. Cathode thickness was found to have the most dramatic effect on cycle life, followed by cathode packing density and electrolyte type. The cycle life of AA Li/TiS2 cells increased substantially as the cathode thickness decreased. At 100% depth of discharge (DOD), over 600 cycles have been demonstrated at 500 mA discharge and 125 mA charge rates. At 50% DOD, 830 cycles have been achieved. AA cells have been discharged at rates up to 2.0 A while maintaining over 60% cathode utilization. Microcalorimetry experiments have been used to estimate a self-discharge rate of less than 1% per month for cycled cells at 25 degrees C. Safety testing indicates that fresh cells do not vent when crushed or externally short circuited but may vent after cycling. Heat tape tests showed that venting did not occur below 170 degrees C.
UR - https://www.scopus.com/pages/publications/85067479834
U2 - 10.1109/IPSS.1992.281991
DO - 10.1109/IPSS.1992.281991
M3 - Conference contribution
T3 - Proceedings of the 35th International Power Sources Symposium
SP - 323
EP - 327
BT - Proceedings of the 35th International Power Sources Symposium
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 35th International Power Sources Symposium, IPSS 1992
Y2 - 22 June 1992 through 25 June 1992
ER -