Home > News > Rechargeable molecular cluster batteries
September 19th, 2007
Rechargeable molecular cluster batteries
Lithium-ion (Li-ion) batteries are a type of rechargeable battery commonly used in consumer electronics. They are currently one of the most popular types of battery for portable electronics, with one of the best capacity-to-weight ratios, no memory effect, and a slow loss of charge when not in use. Lithium is useful in batteries because of its lightness (it is the lightest metal) and because of the high voltage of the redox reaction between Li and Li+. In lithium ion batteries, a layered compound - lithium copper oxide or or lithium nickel oxide - is utilized as a cathode. Although this material can provide high capacity, its charging/discharging rates are slow because these processes include the absorption/desorption of lithium in the cathode. Recently, organic radical batteries have been developed as a new type of rechargeable battery, in which organic radical polymers are utilized as a cathode active material. They achieved a very fast chargeable/dischargeable rate, though their capacities are lower than those of the lithium ion batteries. A lot of research has gone into fabricating lithium batteries that achieve both high capacity and fast charging/discharging. Researchers in Japan came up with a completely new idea - the molecular cluster battery - where the cathode active material is a well-known manganese molecular cluster that is stable and insoluble to most solvents and exhibits a multi-step redox reaction. Although the battery was rechargeable, in early experiments the fast charging-discharging was not yet achieved due to the chemical decomposition of the cluster. Nevertheless, this is a first step that opens up a new branch of research into high-performance rechargeable molecular cluster batteries.
Transparent Conductive Films and Sensors Are Hot Segments in Printed Electronics: Start-ups in these fields show above-average momentum, while companies working on emissive displays such as OLED are fading, Lux Research says April 17th, 2014
Relieving electric vehicle range anxiety with improved batteries: Lithium-sulfur batteries last longer with nanomaterial-packed cathode April 16th, 2014
Catching the (Invisible) Wave: UC Santa Barbara researchers create a unique semiconductor that manipulates light in the invisible infrared/terahertz range, paving the way for new and enhanced applications April 11th, 2014
Nanotech Business Review 2013-2014 April 9th, 2014