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01-Feb-2017 01:50

The exceptional electrochemical performance of the Li-metal anode in the 3D current collector highlights the importance of rational design of current collectors and reveals a new avenue for developing Li anodes with a long lifespan.Electrochemical energy storage systems, for example batteries, with high-energy density and safe and clean features are critical for various applications such as smart electrical grid, electric vehicles and portable electronics.With Li-metal anode accommodated in the 3D current collector, we are able to get Li metal anodes free from the Li dendrite crux and remarkably improve the lifespan of Li-metal anodes.The 3D porous Cu foil is fabricated from a commercial planar Cu foil via a facial and scalable method.Advanced electrode materials are the key to high-energy batteries.Lithium metal is an ideal anode material in terms of energy density because it delivers an attractively high specific capacity (3,860 m A h g.We are coming to an age beyond Li-ion batteries, in which advanced energy storage systems are necessary. The persistent challenge is the formation of dendritic Li during Li plating, which would lead to low Coulombic efficiency, short cycle life, internal short circuits and even catastrophic cell failure (ref.

However, the role of the current collector for the Li-metal anode has not been investigated thoroughly.The use of Li-ion batteries, which use rocking Li ions and Li-intercalating materials (such as graphite) instead of Li metal as anode, has successfully circumvented this problem and gained great success.Nevertheless, with the energy density of Li-ion batteries approaching the theoretical value, they will soon no longer meet the demands for advanced energy storage. How to cope with a ‘Brexit’ and placate other Eurosceptic Member States?