My watch list  

Green routes to supercapacitors


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.

Facts, background information, dossiers
  • Nanjing University
  • copper
  • supercapacitors
More about Royal Society of Chemistry
  • News

    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

  • Videos

    Royal Society of Chemistry – About us

    With more than 51,000 members and an international publishing and knowledge business we are the UK’s professional body for chemical scientists, supporting and representing our members and bringing together chemical scientists from all over the world. more

    A career in toxicology

    Hear from RSC member Vicki Stone talk about her role as a Nanotoxicologist. more

    When Food met Pharma: Delivery Strategies for Nutraceuticals

    With growing prevalence of lifestyle-associated diseases, including obesity, Type II diabetes and cardiovascular disease, there is an urgent need and demand to try to prevent the onset of these diseases within our growing population. Nutraceuticals, along with appropriate diet and exercise, ... more

  • Companies

    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

Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE