| 六方LiMnBO3/C复合物的合成及电化学性能 |
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| 引用本文： | 李琳,郑浩,林华.六方LiMnBO3/C复合物的合成及电化学性能[J].安顺师范高等专科学校学报,2014(2):130-132. |
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| 作者姓名： | 李琳 郑浩 林华 |
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| 作者单位： | 安顺学院化学化工学院,贵州安顺561000 |
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| 基金项目： | 贵州省科技厅、安顺市人民政府、安顺学院联合基金项目“新型锂离子电池正极材料及锂离子电池组电量平衡算法的研究”（项目编号：黔科合J字LKA[2012]02号） |
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| 摘 要： | 采用流变相法方法,成功地合成了六方晶型的LiMnBO3/C复合材料.用XRD、TG、SEM等技术对材料的结构和形貌进行表征,并对其电化学性能进行了测试,结果表明：在电压范围为1.0～4.6 V,电流密度为10 mA/g的充放电条件下,煅烧温度为800℃时,合成的样品首次放电比容量达到了139 mAh/g,而煅烧温度为800℃时,合成的样品首次放电比容量只有105mAh/g.其电化学性能有了明显的改善,具有较高的可逆比容量和优良的循环性能.
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| 关 键 词： | 锂离子电池 正极材料 LiMnBO3 碳包覆 流变相反应法 |
Synthesis and Electrochemical Performance of New Cathode Material Hexagonal LiMnBO3/C Composite |
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| Li Lin,ZhengHao,Lin Hua.Synthesis and Electrochemical Performance of New Cathode Material Hexagonal LiMnBO3/C Composite[J].Journal of Anshun Teachers College,2014(2):130-132. |
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| Authors: | Li Lin ZhengHao Lin Hua |
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| Institution: | 1,2,3 college of chemistry and chemical engineering,Anshun university, Anshun 561000,Guizhou ,China) |
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| Abstract: | Hexagonal LiMnBO5/C composite were prepared by a rheological phase reaction method, using LiOH ·2H2O, MnAc2·4H2O, and H3BO3 as reactants, Citric add was used as carbon source during synthesis process. The structure and mot phology of samples were characterized by X-ray diffraction （XRD）, thermagravimetric analysis （TGA）, scanning electron micros copy （SEM） techniques. The initial specific capadty of the LiMnBO3/C dectrode （annealed at 830℃） was 139 mAh/g in a volatage of 0.01-4,6 V versus Li/Li＋, but the initial spedfic capadty of the LiMnBO3/C electrode （annealed at 850℃） was just 105 mAh/g. The dectrochemical tests showed that the carborrcoated LiMnBO3 could greatly improve the discharge capacity, rate capability and cycling stability. |
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| Keywords: | Lithium ion batteries Cathode material LiMnBO3 Carbon-coated Rheological phase synthesis |
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