Understanding the improved performance of sulfur‐doped interconnected carbon microspheres for Na‐ion storage
Source abstract
Abstract
Abstract As one of the low‐cost energy storage systems, Na‐ion batteries (NIBs) have received tremendous attention. However, the performance of current anode materials still cannot meet the requirements of NIBs. In our work, we obtain sulfur‐doped interconnected carbon microspheres (S‐CSs) via a simple hydrothermal method and subsequent sulfurizing treatment. Our S‐CSs exhibit an ultrahigh reversible capacity of 520 mAh g–1 at 100 mA g–1 after 50 cycles and an excellent rate capability of 257 mAh g–1, even at a high current density of 2 A g–1. The density functional theory calculations demonstrate that sulfur doping in carbon favors the adsorption of Na atom during the sodiation process, which is accountable for the performance enhancement. Furthermore, we also utilize operando Raman spectroscopy to analyze the electrochemical reaction of our S‐CSs, which further highlights the sulfur doping in improving Na‐ion storage performance.
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Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Supercapacitor Materials and Fabrication
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics, Siyuan Laboratory, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials Jinan University Guangzhou Guangdong China
School of Advanced Materials, Shenzhen Graduate School, Peking University Shenzhen Guangdong China
Department of Chemistry and Biological Engineering Guilin University of Technology Guilin China
Shanghai Key Laboratory of Magnetic Resonance, School of Physics and Electronic Science East China Normal University Shanghai China
Funding
Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China · Ministry of Education of the People's Republic of China
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