Wu Qijie, Shu Kewei, Zhao Long, Zhang Jianming
Institute of Quantum and Sustainable Technology (IQST), School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
Molecules. 2024 Sep 29;29(19):4639. doi: 10.3390/molecules29194639.
Exploring high-performance carbon anodes that are low-cost and easily accessible is the key to the commercialization of sodium-ion batteries. Producing carbon materials from bio by-products is an intriguing strategy for sodium-ion battery anode manufacture and for high-value utilization of biomass. Herein, a novel hard carbon (PPHC) was prepared via a facile pyrolysis process followed by acid treatment using biowaste pomegranate peel as the precursor. The morphology and structure of the PPHC were influenced by the carbonization temperature, as evidenced by physicochemical characterization. The PPHC pyrolyzed at 1100 °C showed expanded interlayer spacing and appropriate oxygen group content. When used as a sodium ion battery anode, the PPHC-1100 demonstrated a reversible capacity of up to 330 mAh g, maintaining 174 mAh g at an increased current rate of 1 C. After 200 cycles at 0.5 C, the capacity delivered by PPHC-1100 was 175 mAh g. The electrochemical behavior of PPHC electrodes was investigated, revealing that the PPHC-1100 possessed increased capacitive-controlled energy storage and improved ion transport properties, which explained its excellent electrochemical performance. This work underscores the feasibility of high-performance sodium-ion battery anodes derived from biowaste and provides insights into the sodium storage process in biomass-derived hard carbon.
探索低成本且易于获取的高性能碳负极是钠离子电池商业化的关键。利用生物副产物制备碳材料是一种用于钠离子电池负极制造和生物质高价值利用的有趣策略。在此，以生物废弃物石榴皮为前驱体，通过简便的热解过程并结合酸处理制备了一种新型硬碳（PPHC）。物理化学表征表明，PPHC的形貌和结构受碳化温度影响。在1100℃热解的PPHC表现出扩大的层间距和合适的含氧基团含量。当用作钠离子电池负极时，PPHC - 1100展现出高达330 mAh g的可逆容量，在1 C的增大电流密度下保持174 mAh g。在0.5 C下循环200次后，PPHC - 1100的容量为175 mAh g。对PPHC电极的电化学行为进行了研究，结果表明PPHC - 1100具有增强的电容控制储能和改善的离子传输性能，这解释了其优异的电化学性能。这项工作强调了源自生物废弃物的高性能钠离子电池负极的可行性，并为生物质衍生硬碳中的储钠过程提供了见解。
