18650 Battery 3.70V 4000mah Rechargeable Lithium-Ion Battery
|4.1||Typical Capacity||4030mAh @ 0.2C Discharge|
|Minimum capacity||3950mAh @ 0.2C Discharge|
|4.3||Standard Charge||CC/CV,0.2C5A, 4.20V|
|4.4||Standard Discharge||CC,0.2C5A, 2.75V|
|4.6||End-of-charge Current||0.01C5A (At CV mode)|
|4.7||End-of-discharge Voltage||2.45 V|
|4.8||Charging Time||8.0hours(standard charge)|
|4.9||Quick Charge Current||4000mA (1.0C5rate)|
|4.10||Quick Discharge Current||8000mA (2.0C5rate)|
|4.11||Max Discharge Current||40000mA (10.0C5rate)|
|4.14||Operating temperature||Charging: 0℃~45℃
|4.16||Storage Humidity||≤75% RH|
|4.17||Appearance||Without scratch, distortion, contamination and leakage|
|4.18||Standard environmental condition||Temperature : 25±5℃
Humidity : 45-75%RH
Atmospheric Pressure : 86-106 KPA
|4.19||Temperature Dependence of Discharge Capacity
@ 0.2C Discharge
|Charge temperature||Discharge temperature|
Because superconductors can sustain very large currents, they can store a lot of energy in a relatively small volume. But even superconducting materials cannot sustain limitless electrical currents, and they can lose their special properties above a critical current density, which is in excess of 10 mega-amperes per square centimeter for state-of-the-art superconducting cables. By comparison, copper can carry a maximum current density of 500 amperes per square centimeter, which is same as the current density passed through a 100-watt tungsten wire light bulb.
While these critical currents where superconductivity turns off are known, what happens at the nanoscale inside the material as its approaches that critical condition is still unknown, yet it might hold the key to engineer better superconducting cables and devices, with even higher resilience.
Comin was one of three MIT researchers to win a U.S. Air Force Young Investigator Research Program grant this fall. The three-year, $450,000 award will allow Comin to pursue research into what happens to one particular superconducting material, yttrium barium copper oxide (YBCO) when it is driven at large currents.