In Situ TEM Reveals the Hard Carbon Sodium Storage Mechanism and Discovers the Sodium Carbide
Source abstract
Abstract
ABSTRACT Hard carbon anodes for sodium‐ion batteries rely on Na + insertion into graphite‐like layers below 0.1 V, where closed‐pore structures are critical for high energy density. However, controlling hard carbon microstructures remains challenging. Here, the industrial lignin precursor was simply pre‐pyrolyzed and carbonized to synthesize high‐performance hard carbon with curved graphite‐like layers forming topological cavities. Through GITT and in situ TEM, we visualized Na + (de)intercalation and demonstrated that closed pores (∼1 nm) enhance sodium storage. Even the FFT transform revealed the appearance of a new material lattice (C 32 Na). This work provides insights for tuning hard carbon microstructures and biomass bulk processing and value‐added utilization.
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Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Fiber-reinforced polymer composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Light Industry State Key Laboratory of Green Papermaking and Resource Recycling, Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education Qilu University of Technology (Shandong Academy of Sciences) Jinan China
Guangdong Engineering Technology Research Center For Sensing Materials Devices Guangzhou Key Laboratory of Sensing Materials Devices School of Chemistry and Chemical Engineering, Guangzhou University Guangzhou China
Medical Science and Technology Innovation Center and Electron Microscopy Center Shandong First Medical University and Shandong Academy of Medical Sciences Jinan China
Funding
National Natural Science Foundation of China
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