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05-03-2013: A new copper-manganese composite could find use as a supercapacitor thanks to its high capacitance, conductivity and durability. What’s more, the synthesis of the material makes use of tree leaves – an abundance natural resource that makes this a truly green material.
Researchers from Nanjing University, China, prepared a highly conductive copper superstructure using the sapless leaves of magnolia, phoenix and maidenhair trees. They added a MnO2 nanofilm coating and used the resulting composite material as an electrode in an electrochemical supercapacitor, measuring a capacitance of 1024 F g-1. Approximately 96% of this capacity was retained after 2000 charge-discharge cycles.
Supercapacitors are thought to be good candidates for future power-storage devices, showing high power density, fast charging/discharging and excellent cycling stability.
Original publication:
H Pang et al, J. Mater.Chem. A, 2013
New coating is self-defence for seeds
Scientists in Switzerland have developed a protective coating for seeds that poisons pests with cyanide when they bite into it. The coating is a system of two layers and only becomes toxic when the layers are mixed, eliminating the problem of environmental contamination that is associated w ... more
Using bacteria to make electrodes
Scientists in France have produced hematite using a bacterial pathway for use as an electrode material in Li-ion technologies. Currently, most commercial electrode materials for Li-ion technologies are prepared using the ceramic method, which requires long heating periods at high temperatur ... more
Marine plant replacement for platinum in solar cells
An international research team has shown that that the power conversion efficiency of sea tangle extract is comparable to platinum in solar cell electrodes. Dye-sensitized solar cells (DSCs) are quickly becoming a widespread and affordable alternative to photovoltaic solar cells. The electr ... more
Single-Molecule Microscopy and Spectroscopy
Since their inception, optical detection and spectroscopy of single molecules have steadily expanded to an amazing variety of disciplines in natural sciences. Domains as varied as optical microscopy, quantum optics, nanophotonics, material science and soft-matter physical chemistry all have ... more
Carbon dioxide utilisation processes convert CO2 into commercially viable products such as chemicals, polymers, building materials and fuels. Carbon dioxide utilisation is an emerging technology which can contribute to the reduction of greenhouse gas emissions by the use of CO2 to manufactu ... more
24th International Symposium: Synthesis in Organic Chemistry
The Synthesis in Organic Chemistry conference is the flagship event of the RSC's Organic Division. The first meeting of this internationally renowned symposium was held in Oxford in 1969, and since then the meetings have alternated on a biennial basis between Oxford and Cambridge. The S ... more
Royal Society of Chemistry (RSC)
The RSC is a leading international publisher of highly regarded journals and books in the chemical sciences. The RSC is also the professional body for chemists with a global membership of over 46,000. more
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