期刊
NANO RESEARCH
卷 8, 期 2, 页码 523-532出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-014-0666-x
关键词
calcium terephthalate; carboxylate; Li-ion batteries; organic electrode
类别
资金
- National Natural Science Foundation of China [51033006, 51211140045, 11234013, 21473022]
- Fundamental Research Funds for the Central Universities, China [ZYGX2012Z003]
Currently, many organic materials are being considered as electrode materials and display good electrochemical behavior. However, the most critical issues related to the wide use of organic electrodes are their low thermal stability and poor cycling performance due to their high solubility in electrolytes. Focusing on one of the most conventional carboxylate organic materials, namely lithium terephthalate Li2C8H4O4, we tackle these typical disadvantages via modifying its molecular structure by cation substitution. CaC8H4O4 and Al-2(C8H4O4)(3) are prepared via a facile cation exchange reaction. Of these, CaC8H4O4 presents the best cycling performance with thermal stability up to 570 A degrees C and capacity of 399 mA center dot h center dot g(-1), without any capacity decay in the voltage window of 0.005-3.0 V. The molecular, crystal structure, and morphology of CaC8H4O4 are retained during cycling. This cation-substitution strategy brings new perspectives in the synthesis of new materials as well as broadening the applications of organic materials in Li/Na-ion batteries.
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