| 具有电容和脱嵌锂特性的锂离子电池复合负极材料性能 |
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| 引用本文： | 方杰,王志兴,李新海,郭华军,彭文杰.具有电容和脱嵌锂特性的锂离子电池复合负极材料性能[J].中南大学学报(自然科学版),2010,41(6). |
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| 作者姓名： | 方杰 王志兴 李新海 郭华军 彭文杰 |
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| 作者单位： | 中南大学冶金科学与工程学院; |
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| 基金项目： | 国家科技支撑计划重点项目 |
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| 摘 要： | 以中间相炭微球和活性炭为原料,采用物理混合的方法制备锂离子电池复合负极材料.用扫描电镜、X线衍射仪、恒电流充放电和循环伏安(CV)测试来表征材料的表面形貌、结构和电化学性能.研究结果表明:制备复合材料的中间相炭微球和活性炭混合均匀;复合材料首次放电和充电比容量分别为549和290 mA-h/g,当电压为0.25～3.00 V时,复合材料充电曲线斜率介于中间相炭微球和活性炭的充电曲线斜率之间,比容量为93 mA-h/g,显示复合负极材料同时具有脱嵌锂特性和双电层特性;循环30次后,复合材料的放电容量为240 mA-h/g;在充放电电流密度为4 A/g时,复合材料的电化学极化较中间相炭微球的极化显著降低,是一种具有发展前途的锂离子电池负极材料.
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| 关 键 词： | 复合负极材料 电容特性 脱嵌锂特性 |
Anode composition with capacitance and (de)lithiation for lithium ion battery |
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| FANG Jie,WANG Zhi-xing,LI Xin-hai,GUO Hua-jun,PENG Wen-jie.Anode composition with capacitance and (de)lithiation for lithium ion battery[J].Journal of Central South University:Science and Technology,2010,41(6). |
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| Authors: | FANG Jie WANG Zhi-xing LI Xin-hai GUO Hua-jun PENG Wen-jie |
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| Institution: | FANG Jie,WANG Zhi-xing,LI Xin-hai,GUO Hua-jun,PENG Wen-jie (School of Metallurgical Science and Engineering,Central South University,Changsha 410083,China) |
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| Abstract: | An anode composite sample was prepared by means of physical mix using carbon microbeads and activated carbon as precursors.Scanning electron microscope,X-ray diffractrometry,the constant current charge/discharge and cyclic voltammmogram(CV) testing were adopted to investigate the morphology,structure and electrochemical performance of samples.The results showed that carbon microbeads and activated carbon for preparation of composites are mixed evenly.The initial specific discharge and charge capacity of com... |
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| Keywords: | anode composites capacitance (de)lithiation |
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