Sodium-Ion Battery Cycle Life Breaks Through 8,000 Cycles: CATL's Second-Generation Product Storage Cost Approaches Lead-Acid Batteries
CATL released its second-generation sodium-ion battery with cycle life improved from 3,000 to 8,000 cycles and cost reduced below $50/kWh, approaching lead-acid battery levels.
On August 13, 2028, CATL unveiled its second-generation sodium-ion battery at its Investor Day event. The new product's cycle life has been significantly improved from the first generation's 3,000 to 8,000 cycles, with manufacturing cost per kilowatt-hour reduced to $48, approaching the $40 level of lead-acid batteries.
The second-generation product uses an improved layered oxide cathode and hard carbon anode formulation, solving the first generation's capacity degradation issue in low-temperature environments. Testing at minus 20 degrees Celsius showed the second-generation product still maintains 85% of rated capacity.
CATL Chairman Zeng Yuqun stated that sodium-ion batteries are positioned not to replace lithium batteries but to provide more economical solutions in energy storage and low-speed electric vehicles. The company plans to increase sodium-ion battery annual production capacity to 50 GWh by 2029.
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