超声微纳米加工锰源前驱体提高锰基锂电池电化学性能的研究
Research on Improving the Electrochemical Performance of Manganese Based Lithium Batteries by Ultrasonic Micro-Nano Processing of Manganese Source Precursors
刘鑫翔 1马建民 2张丽云 3李致朋 4杨勇 3李华成 3金晶 5江卫良 6蓝凌霄 7吴元花 8曾文明 8周彤 9詹锋1
作者信息
- 1. 广西大学资源环境与材料学院,广西 南宁 530004
- 2. 湖南大学物理与微电子科学学院,湖南 长沙 410082
- 3. 南方锰业集团有限责任公司,广西 南宁 530200
- 4. 深圳市致远动力科技有限公司,广东 深圳 518055
- 5. 深圳中芯能科技有限公司,广东 深圳 518000
- 6. 深圳永泰数能科技有限公司,广东 深圳 518000
- 7. 广西科技大学,广西 柳州 545006
- 8. 广西桂柳新材料股份有限公司,广西 柳州 545005
- 9. 湘潭电化科技股份有限公司,湖南 湘潭 411100
- 折叠
摘要
研究深入探讨了微纳米气泡水和超声搅拌技术在磷酸锰铁锂(LFMP)合成过程中的应用,旨在提高锰基锂离子电池的电化学性能.实验将LiOH、MnSO4·H2O、FeSO4·H2O和H3PO4按顺序分别加入微纳米气泡水和去离子水中,并通过超声搅拌180 min,制备2 种LFMP样品.使样品在180℃下反应18 h,通过离心、清洗和烘干等步骤得到最终产物.电化学测试显示,使用微纳米气泡水的LFMP样品在1C电流倍率下具有更高的首圈放电比容量(149.82 mAh/g)和循环稳定性,100 次循环后容量保持率为 81.66%.相比之下,使用去离子水的样品首圈放电比容量为57.03 mAh/g,100 次循环后容量保持率为96.98%.研究表明,微纳米气泡水和超声搅拌技术能有效减少前驱体的团聚和氧化,提高材料的结构稳定性和电化学性能,为锰基电池前驱体的改善提供了一种有效的合成方法.
Abstract
This study delves into the application of micro-nano bubble water and ultrasonic stirring technology in the synthesis process of lithium manganese iron phosphate(LFMP),aiming to improve the electrochemical performance of manganese based lithium-ion batteries.In the experiment,LiOH,MnSO4·H2O,FeSO4·H2O,and H3PO4 were sequentially added tomicro-nano bubble water and deionized water,respectively.Two LFMP samples were prepared by ultrasonic stirring for 180 minutes.React the samples at 180℃ for 18 hours,and obtain the final product through steps such as centrifugation,cleaning,and drying.Electrochemical tests showed that the LFMP sample using micro-nano bubble water had a higher first cycle discharge specific capacity(149.82 mAh/g)and cycling stability at a current rate of 1 C,with a capacity retention rate of 81.66％ after 100 cycles.In contrast,the first cycle discharge specific capacity of the sample using deionized water is 57.03 mAh/g,and the capacity retention rate after cycling is 96.98％ .Research has shown that micro-nano bubble water and ultrasonic stirring technology can effectively reduce the aggregation and oxidation of precursors,improve the structural stability and electrochemical performance of materials,and provide an effective synthesis method for the improvement of manganese based battery precursors.
关键词
锰基锂离子电池/微纳米气泡水/超声搅拌法/锰基电池前驱体Key words
Manganese based lithium-ion batteries/Micro-Nano bubble water/Ultrasonic stirring method/Manganese based battery precursor引用本文复制引用
基金项目
广西创新驱动发展专项桂科(AA17204063)
出版年
2024
NETL
NSTL
万方数据