Lithium Batteries 3.2V 50AH LFP Cells High Quality Li-Ion Battery For EV/Energy Storages

Capacity	Nominal	50Ah
	Typical	Min. 50Ah
Cut-off  Charging Voltage	Max. 3.65V
Nominal Voltage	3.2V
Standard Charging Method	Constant Current/ Constant Voltage
Cut-off Discharging Voltage	2.5V
Charge	Standard Current	1C
	Max. Continuous Current	2C
	Cut-off Current	0.05C
Discharge	Stardard Current	1C
	Max. Cotinuous Current	2C
Cycle Life	>5000 cycle times
Ambient Temperature	for Standard Charge	0℃~45℃
	for Discharge	-20℃~55℃
Storage	Storage Temperature	-20℃~40℃
	Storage Humidity	15%~90%
	State of Charge(SOC)	30%~50%
Weight of Bare Cell	about 1.1 kg
Charge State Internal Impedance	0.9mΩ

The researchers first decided the anode needed to be sulfur, a widely available byproduct of natural gas and petroleum refining that’s very energy dense, having the lowest cost per stored charge next to water and air. The challenge then was finding an inexpensive liquid cathode material that remained stable while producing a meaningful charge. That seemed improbable — until a serendipitous discovery in the lab.

On a short list of candidates was a compound called potassium permanganate. If used as a cathode material, that compound is “reduced” — a reaction that draws ions from the anode to the cathode, discharging electricity. However, the reduction of the permanganate is normally impossible to reverse, meaning the battery wouldn’t be rechargeable.

Still, Li tried. As expected, the reversal failed. However, the battery was, in fact, recharging, due to an unexpected oxygen reaction in the cathode, which was running entirely on air. “I said, ‘Wait, you figured out a rechargeable chemistry using sulfur that does not require a cathode compound?’ That was the ah-ha moment,” Chiang says.