硫酸酸浸改性修饰花生壳基硬碳负极材料的制备和储钠性能的研究

doi:10.11896/cldb.25030015

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Abstract Biomass-based hard carbon materials have lots of advantages, such as low cost, renewability, and natural porous structures. They have gradually become a hotspot in research of anode materials of sodium-ion batteries. However, the electrochemical performance of ordinary biomass-based hard carbon anode materials is severely limited due to their complex surface structures and numerous side reactions of functional groups. They exhibit low initial coulombic efficiency (ICE) and poor cycling stability. In this work, the S-HC-1000 hard carbon material was synthesized by modifying the peanut shell-based precursor through sulfuric acid immersion and then combining it with a simple carbonization process. The results demonstrate that the S-HC-1000 exhibits a notable enhancement in ICE (increasing from 51.1% to 82.3%) and improved cycling stability (exhibiting a high capacity retention rate of 94.4% after 500 cycles). This can be attributed to the sulfuric acid modification, which optimizes the interlayer spacings of the material and modulates surface oxygen-containing functional groups, thereby endowing the resultant biomass-derived hard carbon with a stable structure and enhanced electrochemical performance. The sulfuric acid leaching modification method proposed in this study provides an effective strategy for advancing research on the performance enhancement of sodium-ion battery anode materials.

Key words： sodium ion battery biomass hard carbon sulfuric acid immersion modification

Published: Online: 2026-04-16

CLC number:	TM912
	TQ127.11

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	PENG Siyuan
	QI Xiaopeng

Cite this article:

PENG Siyuan,QI Xiaopeng. Synthesis and Sodium Storage Performance of Sulfuric Acid Immersion Modified Peanut Shell-derived Hard Carbon Anode Material[J]. Materials Reports, 2026, 40(7): 25030015-8.

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https://www.mater-rep.com/EN/10.11896/cldb.25030015 OR https://www.mater-rep.com/EN/Y2026/V40/I7/25030015

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