Affiliation:
1. Frontiers Science Center for New Organic Matter State Key Laboratory of Advanced Chemical Power Sources Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) College of Chemistry Nankai University Tianjin 300071 P. R. China
2. School of Materials Science and Engineering Key Laboratory of Electronic Packaging and Advanced Functional Materials of Hunan Province Central South University Changsha Hunan 410083 P. R. China
3. Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192 P. R. China
Abstract
AbstractSodium‐ion batteries (SIBs) are considered as a promising candidate for large‐scale electrochemical energy storage devices due to their low cost, abundant upstream resources, and compatible manufacturing processes with lithium‐ion batteries. However, the highly active free solvent molecules in the liquid electrolyte trigger continuous interfacial side reactions between electrodes and electrolyte, which degrades the cycling performance of SIBs. Herein, a Cu‐based metal‐organic framework (MOF) with a uniform nanoporous channel of 1.1 nm is exploited to confine the electrolyte. Benefiting from the highly‐aggregated solvation configuration, the MOF‐confined electrolyte possesses superior chemical/electrochemical and thermal stability, which guarantees its interface compatibility and flame retardancy. As a result, the batteries with the nano‐confined electrolyte and Na3V2(PO4)3 cathode show an ultra‐long lifetime of 3000 cycles with 93% capacity retention and decent high‐temperature performance (600 cycles with 90% capacity retention). This work presents a viable method for fabricating sustainable SIBs and also provides guidance for solving the side reactions between electrolytes and electrodes in electrochemical energy storage systems.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Cited by
7 articles.
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