物理化学学报 >> 2026, Vol. 42 >> Issue (5): 100199.doi: 10.1016/j.actphy.2025.100199

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玉米酒糟衍生硬碳:一种可持续的高倍率、长寿命钠离子电池负极材料

张雪1, 何子涵1, 吴英琪1, 余维来2,*(), 刘涛1,*()   

  1. 1 中国地质大学(武汉)材料科学与化学学院, 太阳燃料实验室, 湖北 武汉 430078
    2 Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto ON, M5S3E5, Canada
  • 收稿日期:2025-08-29 修回日期:2025-09-28 录用日期:2025-09-29 发布日期:2026-01-23
  • 通讯作者: Email: weilai.yu@utoronto.ca (余维来)liutao54@cug.edu.cn (刘涛)

Corn-distillers-derived hard carbon: a sustainable high-rate, long-life anode for sodium-ion batteries

Xue Zhang1, Zihan He1, Yingqi Wu1, Weilai Yu2,*(), Tao Liu1,*()   

  1. 1 Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430078, Hubei Proivince, China
    2 Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto ON, M5S3E5, Canada
  • Received:2025-08-29 Revised:2025-09-28 Accepted:2025-09-29 Published:2026-01-23
  • Contact: Email: weilai.yu@utoronto.ca (Weilai Yu)liutao54@cug.edu.cn (Tao Liu)

摘要:

以玉米酒糟为原料制备的硬碳(HC)是一种可持续、低成本钠离子电池(SIBs)负极候选材料,但其实际应用一直受限于其不足的可逆容量。本研究报道一种温度梯度处理法,该方法可精确调控玉米酒糟衍生硬碳的层间距、孔隙率和石墨化程度,从而获得卓越的电化学性能。优化后的材料具有0.378 nm层间距和1.68 nm主孔径,展现出优异的高倍率性能:在1.0和2.0 A g-1电流密度下分别实现289与198 mAh g-1的比容量,且在2.0 A g-1下循环700次后容量保持率达83%。通过原位X射线衍射与非原位拉曼光谱联用,揭示出“吸附-插层协同孔隙填充”的独特储钠机制,该机制有助于解释其快速动力学特性和长循环稳定性。这些结果表明,通过精准调控生物质衍生硬碳的结构策略,可实现实用化SIB负极所需的容量、倍率性能和循环寿命——使这种储量丰富、源自废弃物的材料大幅迈向商业化。

关键词: 玉米酒糟, 硬碳, 非原位拉曼, 原位X射线衍射, 倍率性能

Abstract:

Hard carbon (HC) derived from corn-distillers is a sustainable, affordable anode candidate for sodium-ion batteries (SIBs), yet its practical deployment has been limited by insufficient reversible capacity. Here we report a temperature-gradient treatment that precisely tailors interlayer spacing, porosity, and graphitization in corn-distillers-derived hard carbon, unlocking exceptional electrochemical performance. The optimized material exhibits an interlayer spacing of 0.378 nm and a dominant pore size of 1.68 nm. It demonstrates outstanding high-rate behavior, achieving 289 and 198 mAh g-1 at 1.0 and 2.0 A g-1, respectively. Additionally, it retains 83% of its capacity after 700 cycles at 2.0 A g-1. Integrating in situ X-ray diffraction with ex situ Raman spectroscopy demonstrates a unique sodium-storage mechanism characterized by both "adsorption–intercalation and pore-filling". This approach helps elucidate the rapid kinetics and long-lasting performance. These results demonstrate that controlled structural tactics of biomass-derived HC can achieve the desired capacity, rate capability, and longevity required for practical SIB anodes—bringing an abundant, waste-derived feedstock dramatically closer to commercialization.

Key words: Corn distillers, Hard carbon, Ex situ Raman, In situ XRD, Rate performance