摘要
为了优化钠离子电池制备及提高硬碳负极材料性能,对主流厂家生产的3种硬碳产品(可乐丽、佰思格及贝特瑞)的形貌、颗粒尺寸、晶体结构、孔洞、压实密度、容量、循环性能、倍率性能、扩散性能等结构及电化学性能进行了分析。结果表明:可乐丽硬碳粒径及比表面积最小,孔径分布最集中,压实密度最高;佰思格硬碳晶体无序度最高;贝特瑞硬碳颗粒及比表面积最大;佰思格、可乐丽及贝特瑞硬碳首次可逆比容量分别为319.0、303.3和301.0 mAh/g,且可乐丽硬碳循环250次后的容量保持率及10 C下比容量最高,分别为95.7%和232.0 mAh/g;电化学反应过程中,可乐丽硬碳易受表面控制,而贝特瑞及佰思格硬碳主要受扩散控制。
In order to optimize the preparation of sodium-ion batteries and improve the performance of hard carbon anode materials,the structural and electrochemical properties of commercial hard carbon materials from three leading manufacturers(Kuraray,Baisige,and BTR)were analyzed,including morphology,particle size,crystalline structure,pore characteristic,compacted density,specific capacity,cycling stability,rate capability,and diffusion kinetics.The results reveal that Kuraray's hard carbon demonstrates the smallest particle size and specific surface area,the most concentrated pore size distribution,and the highest compacted density.Baisige's hard carbon exhibits the highest structural disorder,while BTR's hard carbon shows the largest particle size and specific surface area.The initial reversible specific capacities of the hard carbon from Baisige,Kuraray and BTR are 319.0,303.3 and 301.0 mAh/g.Notably,Kuraray's hard carbon demonstrates the highest capacity retention(95.7%after 250 cycles)and the best rate capability(232.0 mAh/g at 10 C).During the electrochemical reaction process,Kuraray's hard carbon is predominantly surface-controlled,while Baisige and BTR's systems are mainly diffusion-controlled.
作者
夏晶
高源
李枢相
李首毅
高隆
张大奎
张宝磊
XIA Jing;GAO Yuan;LI Shuxiang;LI Shouyi;GAO Long;ZHANG Dakui;ZHANG Baolei(Ansteel Beijing Research Institute Co.,Ltd.,Beijing 102200,China;Angang Steel Co.,Ltd.,Anshan Liaoning 114021,China)
出处
《电源技术》
北大核心
2025年第10期2101-2108,共8页
Chinese Journal of Power Sources
关键词
钠离子电池
硬碳
负极
电化学
sodium-ion battery
hard carbon
anode
electrochemistry
作者简介
夏晶(1987—),女,重庆市人,高级工程师,主要研究方向为碳基新能源材料。
