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首页> 外文期刊>International Journal of Electrochemical Science >Preparation and Electrochemical Performance of Spherical Mesophase Soft Carbon Materials Composite Anodes for Lithium-ion Batteries
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Preparation and Electrochemical Performance of Spherical Mesophase Soft Carbon Materials Composite Anodes for Lithium-ion Batteries

机译：锂离子电池用球形中间相软碳材料复合阳极的制备及电化学性能

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摘要

It is imperative to develop lithium battery anode materials with high power performance. In this paper,by improving the preparation process, a novel micro-nano composite structure spherical mesophase softcarbon material was developed as the anode material of a lithium-ion battery. The structure and surfacemorphology were observed by SEM and XRD. The material was assembled into a button battery and apower battery for performance testing and safety testing. The experimental results indicate that theprepared soft carbon material has excellent surface properties and a uniform shape distribution. The firstcoulombic efficiency of the button battery is 87.5%. The charging capacity and discharging capacityratios at 2C/1C are 84.8% and 85.9%, respectively. The capacity retention rate after 50 cycles at 0.5C is99.9%. The discharge capacity of the battery decreases with increasing discharge ratio. After 500 cyclesat 0.5C, 93.96% of the capacity is maintained. In low-temperature testing at –20℃, the discharge rate is98.94%, while in high-temperature testing at 60°C, the discharge rate is 99.74%. The battery doesnot catch fire under needle punching, extrusion or overcharging. Therefore, the new soft carbon batteryhas excellent working performance and can be used as a new energy storage battery.
机译：必须开发具有高功率性能的锂电池负极材料。通过改进制备工艺，研制了一种新型的微纳米复合结构球形中间相软碳材料作为锂离子电池的负极材料。通过SEM和XRD观察其结构和表面形态。将该材料组装成纽扣电池和动力电池，以进行性能测试和安全性测试。实验结果表明，所制备的软碳材料具有优异的表面性能和均匀的形状分布。纽扣电池的第一库仑效率为87.5％。 2C / 1C下的充电容量和放电容量比分别为84.8％和85.9％。在0.5℃下50次循环后的容量保持率为99.9％。电池的放电容量随着放电比的增加而降低。在0.5C下500次循环后，保持93.96％的容量。在–20℃的低温测试中，放电率为98.94％，而在60°C的高温测试中，放电率为99.74％。针刺，挤压或过度充电时，电池不会着火。因此，新型软碳电池具有优异的工作性能，可以用作新型储能电池。

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