251. Anode performance of NaOH-etched mesocarbon microbeads for sodium-ion batteries.
- Author
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Zhang, Yun-Peng, Wang, Jin-Xia, Zhao, Pin-Yi, Li, Ming-Wei, and Wang, Cheng-Yang
- Subjects
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MICROBEADS , *ELECTRIC batteries , *MESOPORES , *STORAGE batteries , *ANODES , *PERFORMANCES - Abstract
• Etched mesocarbon microbeads (MCMBs) are used as anodes for sodium-ion batteries. • The etched MCMBs are prepared by carbonizing mixed green MCMBs and NaOH. • The etched MCMBs have interlayer space of 356 pm and more mesopores. • The etched MCMBs anode shows improved rate capability and cyclability. • Modified structure benefit the sodium transfer in etched MCMBs. NaOH-etched mesocarbon microbeads (MCMBs) are prepared by carbonizing a mixture of green MCMBs and NaOH at 650 °C, and are used as the anode material for sodium-ion batteries (SIBs). Comparing with pristine MCMBs, NaOH-etched MCMBs have more surface fissures, more bigger pores with a mean diameter of ~5.0 nm, and graphite-like crystallites with wider interlayer space (356 pm). The etched MCMBs anode displays better rate capability and cyclability. It keeps a capacity of >218 mAh g−1 at a current of 15 mA g−1 with a coulombic efficiency of >97% during 60 cycles. We consider that the etched MCMBs' structure facilitate the sodium transfer and make them being potential as the anode material for SIBs. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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