| 表面包覆保护的新型正极材料LiFeBO3电化学性能 |
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| 引用本文： | 王洪 杨驰 郭春泰 王大兴 孙礼安. 表面包覆保护的新型正极材料LiFeBO3电化学性能[J]. 应用化学, 2011, 28(7): 821-825. DOI: 10.3724/SP.J.1095.2011.00522 |
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| 作者姓名： | 王洪 杨驰 郭春泰 王大兴 孙礼安 |
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| 作者单位： | (1.绵阳师范学院 绵阳 621000；2.天津捷威动力有限公司 天津;3.四川久远环通电源有限责任公司 绵阳) |
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| 基金项目： | 四川省教育厅资助项目（09ZC021），绵阳市科技局资助项目（09Y002-3） |
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| 摘 要： | 以偏硼酸锂和草酸亚铁为原料，采用固相反应,合成了用于动力锂离子电池新型正极材料LiFeBO3,并用乙丙共聚物（EPM）对该材料进行包覆保护处理;采用XRD、SEM和元素分析等测试技术对样品进行表征。 实验表明,LiFeBO3具有较高的放电重量比容量,而且包覆EPM后的硼酸铁锂具有更好的电化学性能,5%EPM包覆的硼酸锂首次放电容量达190 mA·h/g,0.5 C下充放电循环50次后容量衰减只有4.2%。
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| 关 键 词： | 动力锂离子电池 正极材料 硼酸铁锂 |
| 收稿时间： | 2010-09-06 |
The Electrochemical Performance Studies on Novel LiFeBO3 Cathode Materials for Li-ion Batteries |
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| WANG Hong,YANG Ci,GUO Chuntai,WANG Daxing,SUN Lian. The Electrochemical Performance Studies on Novel LiFeBO3 Cathode Materials for Li-ion Batteries[J]. Chinese Journal of Applied Chemistry, 2011, 28(7): 821-825. DOI: 10.3724/SP.J.1095.2011.00522 |
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| Authors: | WANG Hong YANG Ci GUO Chuntai WANG Daxing SUN Lian |
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| Affiliation: | (1.School of Chemistry and Chemical Engineering,Mianyang Normal University,Mianyang 621000;2.Jiewei Power Co.Lt,Tianjin;3.Sichuan Jiuyuan Huantong Power Sources Co. Lt,Mianyang) |
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| Abstract: | The LiFeBO3 cathode materials for Li-ion batteries were prepared by means of solid reaction using lithium metaborate and ferrous oxalate as raw materials. The LiFeBO3 cathode materials were further coated by ethylene propylene copolymer(EPM). The samples were characterized by X-ray diffraction, scanning electron microscopy, and titration analysis. Electrochemical tests of materials showed that LiFeBO3 exhibited a higher discharge mass specific capacity. The electrochemical performance of the coated samples was demonstrated to be improved. Sample coated with 5%EPM had an initial capacity of 190 mA·h/g. It was found that only 4.2% capacity was lost after 50 charge/discharge cyclings at 0.5C. |
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| Keywords: | Lithium ion batterry Cathode material Lithium Iron Borate |
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