Journal
NANOMATERIALS
Volume 9, Issue 5, Pages -Publisher
MDPI
DOI: 10.3390/nano9050793
Keywords
nano hard carbon; turbostratic structure; solid-electrolyte interphase; co-intercalation reaction; sodium-ion battery
Categories
Funding
- National Research Foundation of Korea (NRF) - Korean government (Ministry of Science and ICT) [2018R1C1B5046894]
- Global Frontier R&D Program on Center for Hybrid Interface Materials (HIM) - Ministry of Science, ICT & Future Planning Korea [2013M3A6B1078872]
- National Research Foundation of Korea [2018R1C1B5046894, 2013M3A6B1078874] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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A hindrance to the practical use of sodium-ion batteries is the lack of adequate anode materials. By utilizing the co-intercalation reaction, graphite, which is the most common anode material of lithium-ion batteries, was used for storing sodium ion. However, its performance, such as reversible capacity and coulombic efficiency, remains unsatisfactory for practical needs. Therefore, to overcome these drawbacks, a new carbon material was synthesized so that co-intercalation could occur efficiently. This carbon material has the same morphology as carbon black; that is, it has a wide pathway due to a turbostratic structure, and a short pathway due to small primary particles that allows the co-intercalation reaction to occur efficiently. Additionally, due to the numerous voids present in the inner amorphous structure, the sodium storage capacity was greatly increased. Furthermore, owing to the coarse co-intercalation reaction due to the surface pore structure, the formation of solid-electrolyte interphase was greatly suppressed and the first cycle coulombic efficiency reached 80%. This study shows that the carbon material alone can be used to design good electrode materials for sodium-ion batteries without the use of next-generation materials.
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