Affiliation:
1. National and Local Joint Engineering Research Center of MPTES in High Energy and Safety LIBs Engineering Research Center of MTEES (Ministry of Education), and Guangdong Provincial International Joint Research Center for Energy Storage Materials School of Chemistry South China Normal University Guangzhou 510006 China.
2. Lecturer in the Department of Electrical Engineering Faculty of Engineering Souphanouvong University Luang Prabang Province 06000 Lao Democratic People's Republic.
3. Department of Mechanical and Aerospace Engineering and Department of Chemistry Hong Kong University of Science and Technology Hong Kong China.
Abstract
AbstractAnthraquinone electrode materials are promising candidates for lithium‐ion batteries (LIBs) due to the abundance of anthraquinone and the high theoretical capacity, and good reversibility of the anthraquinone electrodes. However, the active anthraquinone materials are soluble in organic electrolytes, resulting in a sharp decay of capacity during the charge and discharge processes. Herein, we report on a two‐dimensional calcium anthraquinone 2,3‐dicarboxy metal‐organic framework (2D CaAQDC MOF) fabricated using a simple hydrothermal method. The 2D CaAQDC MOF not only effectively inhibits the dissolution of active electrode substances into the electrolyte, but also promotes the diffusion of lithium ion into the pores of the MOF. When used as a cathode for the LIBs, the resulting CaAQDC electrode delivers a high specific capacity of ~100 mAh g−1 at a current density of 50 mA g−1 after 200 cycles, demonstrating its good cycle stability. Even at a high current density of 200 mA g−1, the CaAQDC electrode exhibits a specific capacity of ~60 mAh g−1. The fabricated 2D coordination polymers effectively restrains the dissolution of anthraquinone into the organic electrolyte and enhances the structural stability, which greatly improves the electrochemical performance of anthraquinone. These research results offer a rational molecular design strategy to address the dissolution of this and other active organic electrode materials.
Funder
National Natural Science Foundation of China
Cited by
1 articles.
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