Rabbit Anti-Human AR Polyclonal antibody

In the paper, the results of the study on how etching type influences the quality of mesa structures in discrete antimonide-based photodetectors are presented. Devices based on both symmetrical and asymmetrical InAs/ GaSb type-II superlattices (T2SLs) designed for mid-(MWIR) and long-wavelength infrared spectral range, respectively were tested. Mesa structures were formed using photolithography followed by wet or inductively coupled plasma - reactive ion etching. The former was based on H3PO4:C4H6O6:H2O:H2O2 solution, and dry etching was performed in BCl3:Ar plasma. The quality of mesas was evaluated using a scanning electron mi-croscope. The current-voltage characteristics of MWIR photodetectors based on the symmetric T2SL show significantly lower leakage currents for plasma etched devices.

The operating temperature determines the energy consumption and lithium extraction rate of a pyrometallurgical process. This paper aims to employ a molten ammonium sulfate ((NH4)(2)SO4) assisted roasting approach to recovering and regenerating LiCoO2 from spent lithium-ion batteries (LIBs) at 400 degrees C. First, cathode materials from the spent LIBs are converted to CoSO4 and Li2SO4 via a sulfation roasting approach. Both recovery rates of Li and Co reach over 98% at 400 degrees C for 2h and at an (NH4)(2)SO4/(cathode materials) mass ratio of 4:1 in Ar atmosphere. Then, the obtained Co(OH)(2) and Li2CO3 are used to regenerate LiCoO2 that delivers a specific capacity of over 154 mAh g(-1) at 1C with capacity retention of 94% after 100 cycles. Overall, the molten (NH4)(2)SO4 assisted roasting approach reduces the operating temperature to 400 degrees C while maintaining a high extraction rate of over 98% for both Li and Co, promising an energy-efficient approach to recovering various cathode materials from spent LIBs.