LITHIUM-IRON-PHOSPHATE-BASED BATTERIES: MATERIALS, PROCESSES, CHARACTERISTICS AND PRODUCTION EXPERIENCE IN RUSSIA

The paper analyses the establishment of mass production of lithium-iron-phosphate-based batteries in Liotech Co., Ltd. (Novosibirsk) and studies the electrochemical characteristics of LT-LFP 300 model of batteries. Irreversible capacity for the batteries in the first (formation) cycle was the permissible value of 16.8%. The increase in normalized discharge current within 0.2 to 1.5 С interval had only little effect on the discharge capacity of LT-LFP 300. The discharge capacity of the batteries was virtually unchanged within the temperature range 0 оC to +50 оC while it reasonable declined with temperature decrease below 0 oC. Nevertheless, the LT-LFP 300 batteries demonstrated discharge capacity about ~67% even at –40 оC. When the temperature was increased again to positive values, full recovery of the former values of discharge capacity was observed. After 500 cycles at the normalized discharge current of 0.2 С with discharge depth of ≤80%, the discharge capacity of LT-LFP 300 gradually stabilized at the level of 85-90% in respect to initial value. Operational characteristics of the LT-LFP 300 batteries comply with similar products of other world companies. The lithium-iron-phosphate-based batteries produced by “Liotech” Co., Ltd. were successfully tried as an autonomous power supply in electric vehicles and stationary energy storage systems.

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