Gao Liu at LBNL has developed a new kind of composite anode based on silicon that can absorb eight times the lithium of current Li-ion batteries and maintains a high capacity of 2100 mAh/g in Si after 650 cycles. The key to such improved cyclability is a tailored polymer with dual functionality: it conducts electricity and binds closely to silicon particles as they undergo more than a 300% volume change during the lithiation process (Figure 1).
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LBNL presents its latest results on flow batteries for grid scale storage at ITRI conference in Taiwan
LBNL presented its latest results on flow batteries for grid scale storage at the ITRI Energy Innovation Summit in Taiwan, August 2011.
From Particles to Wires: Shaping Silicon Cyclability
Understanding volume change and conductivity in Si nanostructures for Li-ion anodes
Silicon is a promising next-generation anode material for high-energy lithium-ion batteries due to its high specific capacity, which is theoretically 10 times greater than graphite. However, its cycle life is limited due to volume expansion and fracture during lithium reaction. This degradation of the Si results in loss of electrical connection and pulverization of the electrode. Several fundamental studies still need to be conducted to develop viable Si electrodes for batteries. Yi Cui’s group at Stanford University is working on understanding the properties of various Si nanostructures and is designing new ones based on particles and wires that target improving Si cyclability.
LBNL to Host BLI5
The next Symposium on Electrochemical Storage for Beyond Li-Ion Batteries will be held at the CLaremont Hotel in Berkeley, CA June 5-7, 2012. The preliminary list of speakers, as well as the latest information on conference and hotel registration can be found at BLI5
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