基于粉煤灰空心微珠的硅基材料制备及其电化学性能研究  

Study on preparation and electrochemical propertiesof silicon-based materials based on flyash hollow microspheres

作　　者：王若禹 陈天星 张晓民[1] Wang Ruoyu;Chen Tianxing;Zhang Xiaomin(School of Resource Engineering,Xi'an University of Architecture and Technology,Xi'an Shaanxi 710055,China)

机构地区：[1]西安建筑科技大学资源工程学院,陕西西安710055

出　　处：《化工矿物与加工》2024年第2期20-25,共6页Industrial Minerals & Processing

基　　金：咸阳市科技局重点研发项目(2030022014)。

摘　　要：与传统石墨负极材料相比,硅具有高理论比容量、低嵌锂电位、储量丰富、环境友好等优点,已成为新一代锂离子电池负极材料的研究热点。以粉煤灰空心微珠为前驱体,利用镁热还原法制备了高结晶度硅基材料,并研究了其结构形貌和电化学性能,结果表明:粉煤灰空心微珠通过镁热还原法成功制备出了具有优异电化学性能的硅基材料,首次放电比容量可达2932.8 mAh/g,充电比容量达2336.6 mAh/g,首圈库仑效率为79.7%。该研究成果可为粉煤灰的高值利用和锂离子电池硅基负极材料的制备提供新思路。Compared with the traditional graphite negative material,silicon has the advantages of high theoretical specific capacity,low lithium intercalation potential,abundant reserves and environmental friendliness,which has become research hotspot for the new generation of lithium-ion battery negative materials.High crystallinity silicon-based materials were prepared by magnesium thermal reduction method using fly ash hollow microspheres as precursors,and their structural morphology and electrochemical properties were studied.The results show that fly ash hollow microspheres successfully prepared silicon-based materials with excellent electrochemical properties through magnesium thermal reduction process.The specific capacity of the initial discharge and charge reached 2932.8 mAh/g and 2336.6 mAh/g,and the coulomb efficiency of the first circle was 79.7%.This study provides new idea for the high-value utilization of fly ash and the preparation of silicon-based negative electrode materials for lithium-ion batteries.

关 键 词：粉煤灰 空心微珠 锂离子电池 硅基材料 负极材料 镁热还原法 电化学性能 

分 类 号：X752[环境科学与工程—环境工程]