Journal
ELECTROCHIMICA ACTA
Volume 191, Issue -, Pages 23-28Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.01.019
Keywords
lithium ion batteries; LiFePO4; evaporative self-assembly; electrochemical performance
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Funding
- National Natural Science Foundation of China [51272074, 51572079]
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LiFePO4/carbon nanowires with three-dimensional (3D) nano-network structure were successfully synthesized via evaporative self-assembly method induced by amylose. The morphologies and structures are investigated by X-ray diffractometer, scanning electron microscope and transmission electron microscope. The co-axis one-dimensional LiFePO4/C nanowires, which are 50 nm in diameter and between 400 nm and 1 mu m in length, are tightly connected into 3D nano-network structure by the amorphous carbon from the short branched chains of amylase. They deliver high capacities of 167 and 138 mA h g(-1) at 0.1 C and 50 C respectively. After 100 cycles at 50C rate, the capacity retention of the composite can still maintain 92.8% (128 mA h g(-1)). The unique 3D nano-network structure can effectively increase the contact between active materials and electrolyte, and improve the poor electronic and ionic conductivity. (C) 2016 Elsevier Ltd. All rights reserved.
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