13. The magic of 2D current collectors

2D mxene light current collectors to replace heavy copper current collectors, from Gogotsi group.

Gogotsi paper on mxene current collectors

Gogotsi page at Drexel University

2D current collector on the left (sheets of d-Ti3C2Tx) and cathode (particles of LFP+CB+PVDF) on the right. Inset shows bending of such electrode.

Current collectors are the substrates on which anode and cathode active materials are deposited in a lithium ion battery. They do NOT contribute to battery energy density. Their role is to transport electrons from the location of redox reactions in the active material towards wiring tabs and through the load (cell phone or electric motor, etc). Traditionally, current collectors need high transverse electron conductivity parallel to the sheet plane as well as flexibility and high mechanical strength to allow for tight electrode winding into cells, under high tension. In addition, current collectors need to block any ion transport across the foil which would short the cell. These requirements have traditionally limited a choice of current collector materials to metallic foils such as copper and aluminum, circa 10 micron in thickness. It is desirable to reduce the weight of current collectors which currently can account for as high as 50% of electrode weight in a lithium ion cell. This podcast discusses professor Gogotsi’s invention of mxene based, 2D, light current collectors.

Advertisements

One thought on “13. The magic of 2D current collectors

  1. Nice article, Lithium ion batteries have great scope as increasing need of energy in world, The overall lithium ion battery market is expected to grow from USD 37.4 billion in 2018 to USD 92.2 billion by 2024, at a CAGR of 16.2%.

    Key players operating in the lithium ion battery market include BYD Company (China), LG Chem (South Korea), Panasonic (Japan), Samsung SDI (South Korea), BAK Group (China), GS Yuasa (Japan), Hitachi (Japan), Johnson Controls (Ireland), Toshiba (Japan), Lithium Werks (The Netherlands), CALB (China), Saft Groupe, (France), VARTA Storage (Germany), Farasis Energy (California), and Sila Nanotechnologies (California).
    Source: https://www.marketsandmarkets.com/Market-Reports/lithium-ion-battery-market-49714593.html

Leave a Reply