期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 163, 期 5, 页码 A654-A659出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0661605jes
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资金
- Natural Science Foundation of China (NSFC) [51372263, 51402330]
Correlation between the structure of selenized poly(acrylonitrile) (Se/PAN) composite materials and their electrochemical properties for lithium batteries was studied. Raman spectroscopy and X-ray photoelectron spectroscopy (XPS) measurements demonstrate that higher synthesis temperature results in a higher graphitization degree of the polymer skeleton and fewer Se-Se bonds. The Se/PAN electrodes present excellent rate capability and extra-long cycle life due to their fast electrochemical reaction kinetics and high structural stability. A reversible specific capacity of about 325 mA h g(-1) for the Se/PAN composite synthesized at 500 degrees C was obtained with a capacity decay of only 2.6% (based on the second cycle) after 1500 cycles. Furthermore, the correlation between their structure and electrochemical performance was elucidated. The Se/PAN composites obtained at higher temperature show better cycling stability but lower capacity. (C) 2016 The Electrochemical Society. All rights reserved.
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