Affiliation:
1. Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New Energy iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Fudan University Shanghai 200433 China
2. School of Materials Science and Engineering Anhui University of Technology Ma'anshan 243002 P. R. China
3. Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power College of Environmental and Chemical Engineering Shanghai University of Electric Power Shanghai 200090 China
4. College of Energy Material and Chemistry College of Chemistry and Chemical Engineering Inner Mongolia University Hohhot 010021 P. R. China
Abstract
AbstractSodium‐ion batteries (SIBs), based on hard carbon anodes and Na+‐intercalation compound cathodes, have gained significant attention. Nonetheless, hard carbon anodes involve the storage of Na+ at a low potential, typically below 0.1 V (vs Na/Na+), which increases the risk of dendritic Na growth on the anode surface during overcharging. Herein, a safe organic/inorganic composite anode containing tetrasodium 3,4,9,10‐perylenetetracarboxylate (Na4PTC) and Metallic bismuth (Bi) with a weight ratio of 7:2, which exhibits an average potential of 0.7 V (vs Na+/Na) and a capacity of 150 mAh g−1 is proposed. The electrode reaction involves a reversible coordination reaction within the organic host and alloying reactions within the metallic Bi component. Importantly, the organic component efficiently buffers the volume changes in Bi during the alloying reaction, while the metallic Bi enhances the electronic conductivity of the organic material. As a result, this composite anode shows high cycle stability and rate performance, even under high mass loadings ranging from 10 to 50 mg cm−2. Furthermore, it is demonstrated that the Na‐ion full cell, consisting of the composite anode and the Na3V2O2(PO4)2F cathode, exhibits minimal capacity degradation over 100 cycles while maintaining a high areal capacity of 1.1 mA cm−2.
Funder
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Cited by
2 articles.
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