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Breakage of the dense structure of coal precursors increases the plateau capacity of hard carbon for sodium storage.
Chem Sci
December 2024
MOE Key Laboratory for UV Light-Emitting Materials and Technology, Northeast Normal University Changchun Jilin 130024 China
Article Synopsis
- Hard carbon is a promising material for sodium ion batteries due to its ability to store sodium efficiently, but its production costs are high, prompting efforts to optimize usage of coal-derived hard carbon.
- To enhance the electrochemical performance, a method involving Zn(OH)CO assisted ball milling and subsequent carbonization is proposed to create closed pores within the coal-derived hard carbon, which is essential for increasing capacity.
- The resulting coal-derived hard carbon shows a significant capacity of 325.3 mA h g with a good retention rate over 500 cycles, demonstrating that innovative pore design can significantly boost sodium storage capabilities and utilize coal more effectively.