Nanosize tin particles (Sn-PMCMT) embedded in electrically conducting porous multichannel carbon microtubes are synthesized by co-electrospinning followed by air stabilization and carbonization in Ar/H2 atmosphere. Scanning and transmission electron microscopy show that the material is nanostructured with nanosize Sn particles well embedded into the carbon host matrix. Composite electrodes prepared using Sn-PMCMT, Super-P carbon and Na-carboxymethylcellulose as binder, exhibit a superior rate capability and exceptional cycle life in cell tests at room temperature. Discharge capacities as high as 632 mAh/g at 0.7 C rate are obtained during the first galvanostatic cycles. The delivered capacities are still in excess of 350 mAh/g after 600 cycles, most of them performed at 2C rate. These outstanding results represent the highest performance so far reported for this type of electrode.
High-Performance SnCarbon Nanocomposite Anode for Lithium Batteries
NOBILI, Francesco;MARASSI, Roberto;TOSSICI, Roberto;
2013-01-01
Abstract
Nanosize tin particles (Sn-PMCMT) embedded in electrically conducting porous multichannel carbon microtubes are synthesized by co-electrospinning followed by air stabilization and carbonization in Ar/H2 atmosphere. Scanning and transmission electron microscopy show that the material is nanostructured with nanosize Sn particles well embedded into the carbon host matrix. Composite electrodes prepared using Sn-PMCMT, Super-P carbon and Na-carboxymethylcellulose as binder, exhibit a superior rate capability and exceptional cycle life in cell tests at room temperature. Discharge capacities as high as 632 mAh/g at 0.7 C rate are obtained during the first galvanostatic cycles. The delivered capacities are still in excess of 350 mAh/g after 600 cycles, most of them performed at 2C rate. These outstanding results represent the highest performance so far reported for this type of electrode.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
