Saturday, March 26, 2022

Solar 3.0 - research notes



Solar 3.0: This New Technology Could Change Everything
https://www.youtube.com/watch?v=tQmFVcD-Mbo

Shockley–Queisser limit
https://en.wikipedia.org/wiki/Shockley%E2%80%93Queisser_limit
In physics, the Shockley–Queisser limit (also known as the detailed balance limit, Shockley Queisser Efficiency Limit or SQ Limit, or in physical terms the radiative efficiency limit) is the maximum theoretical efficiency of a solar cell using a single p-n junction to collect power from the cell where the only loss mechanism is radiative recombination in the solar cell. It was first calculated by William Shockley and Hans-Joachim Queisser at Shockley Semiconductor in 1961, giving a maximum efficiency of 30% at 1.1 eV.[1]

https://en.wikipedia.org/wiki/Shockley%E2%80%93Queisser_limit#Exceeding_the_limit



Sunday, March 13, 2022

Promising New Electrolyte for Solid-State Lithium-Ion Batteries

https://scitechdaily.com/scientists-discover-promising-new-electrolyte-for-solid-state-lithium-ion-batteries/

"Researchers from the University of Waterloo, Canada, who are members of the Joint Center for Energy Storage Research (JCESR), headquartered at the U.S. Department of Energy’s (DOE) Argonne National Laboratory, have discovered a new solid electrolyte that offers several important advantages."

"This electrolyte, composed of lithium, scandium, indium, and chlorine, conducts lithium ions well but electrons poorly. This combination is essential to creating an all-solid-state battery that functions without significantly losing capacity for over a hundred cycles at high voltage (above 4 volts) and thousands of cycles at intermediate voltage. The chloride nature of the electrolyte is key to its stability at operating conditions above 4 volts — meaning it is suitable for typical cathode materials that form the mainstay of today’s lithium-ion cells."

The main attraction of a solid-state electrolyte is that it can’t catch fire, and it allows for efficient placement in the battery cell; we were pleased to demonstrate stable high-voltage operation,” said Linda Nazar, a Distinguished Research Professor of Chemistry at UWaterloo and a long-time member of JCESR.


"A paper based on the research, “High areal capacity, long cycle life 4 V ceramic all-solid-state Li-ion batteries enabled by chloride solid electrolytes,” appeared in the January 3 online edition of Nature Energy."

Reference: “High areal capacity, long cycle life 4 V ceramic all-solid-state Li-ion batteries enabled by chloride solid electrolytes” by Laidong Zhou, Tong-Tong Zuo, Chun Yuen Kwok, Se Young Kim, Abdeljalil Assoud, Qiang Zhang, Jürgen Janek and Linda F. Nazar, 3 January 2022, Nature Energy.
DOI: 10.1038/s41560-021-00952-0

Sunday, March 6, 2022

Seattle Center for Wooden Boats, 2022 Rendezvous on the Docks & Online Auction - April 23rd 2022

 If you will be in the Seattle area on Saturday, April 23rd, and if you have a love for nautical traditions, old wooden boats, boat building skills/traditions - join me in supporting a worthy non-profit, at the The Center for Wooden Boats (CWB) - from 4pm-9pm:

"Proceeds from the 2022 Rendezvous on the Docks & Online Auction support CWB’s ability to provide equitable access to empowering maritime experiences. Last year, CWB engaged over 30,000 people with sailing and woodworking instruction, boat rentals, the Public Peapod Program, and free access to maritime exhibits. Your generosity helps us steward northwest maritime heritage through hands-on learning on the water and in our boat shops, and enables CWB to provide scholarships to our youth programs for families in need - ensuring access to boating opportunities for people from all walks life."