Dicarboxylate CaC8H4O4 as a high-performance anode for Li-ion batteries
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- 作者：Liping Wang ; Haiquan Zhang ; Chengxu Mou ; Qianling Cui ; Qijiu Deng…
- 关键词：calcium terephthalate ; carboxylate ; Li ; ion batteries ; organic electrode
- 刊名：Nano Research
- 出版年：2015
- 出版时间：February 2015
- 年：2015
- 卷：8
- 期：2
- 页码：523-532
- 全文大小：2,656 KB
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- 刊物主题：Chinese Library of Science
Chemistry
Nanotechnology - 出版者：Tsinghua University Press, co-published with Springer-Verlag GmbH
- ISSN：1998-0000
文摘
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 Al2(C8H4O4)3 are prepared via a facile cation exchange reaction. Of these, CaC8H4O4 presents the best cycling performance with thermal stability up to 570 °C and capacity of 399 mA·h·g?, without any capacity decay in the voltage window of 0.005-.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.