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Nano Research

Article Title

Dicarboxylate CaC8H4O4 as a high-performance anode for Li-ion batteries

Authors

Liping Wang, State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
Haiquan Zhang, State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
Chengxu Mou, State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
Qianling Cui, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
Qijiu Deng, State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
Jing Xue, State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
Xinyi Dai, State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China
Jingze Li, State Key Laboratory of Electronic Thin Films and Integrated Devices, School of Microelectronics and Solid-State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China

Keywords

calcium terephthalate, carboxylate, Li-ion batteries, organic electrode

Abstract

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–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.

Graphical Abstract

Publisher

Tsinghua University Press

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