| 锰基正极材料Li_(1.2)Ni_(0.13)Co_(0.13)Mn_(0.54)O_2的改性研究 |
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| 引用本文： | 吴汉杰,梁兴华. 锰基正极材料Li_(1.2)Ni_(0.13)Co_(0.13)Mn_(0.54)O_2的改性研究[J]. 电源技术, 2017, 0(11): 1520-1521,1540. DOI: 10.3969/j.issn.1002-087X.2017.11.003 |
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| 作者姓名： | 吴汉杰 梁兴华 |
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| 作者单位： | 广西科技大学广西汽车零部件与整车技术重点实验室,广西柳州,545006 |
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| 基金项目： | 广西汽车零部件与整车技术重点实验室开放课题，广西科技大学研究生教育创新计划项目，广西汽车零部件与整车技术重点实验室自主研究课题，广西科技大学研究生教育创新计划项目 |
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| 摘 要： | 采用高温固相合成法制备锰基正极材料Li_(1.2)Ni_(0.13-x/3)Co_(0.13-x/3)Mn_(0.54-x/3)Cr_xO_2(x=0,0.01,0.02,0.03),其中合成的锰基正极材料Li_(1.2)Ni_(0.13-x/3)Co_(0.13-x/3)Mn_(0.54-x/3)Cr_xO_2(x=0.02)的粒径分布均匀、结晶程度极高和结构稳定性很好,在不同倍率0.1C、0.2 C、0.5 C、1 C和2 C下的放电比容量分别达到332.11、308.36、271.06、191.56、113.92 m Ah/g,并在0.1 C下循环50次后的放电比容量维持率为97%,所以少量Cr3+的掺杂对正极材料Li_(1.2)Ni_(0.13)Co_(0.13)Mn_(0.54)O_2的充放电比容量、倍率特性和循环稳定性等电化学性能更好。
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| 关 键 词： | 正极材料 电化学性能 Li1.2Ni0.13Co0.13Mn0.54O2 Cr掺杂 |
Research on modified characterization of Mn-base cathode material Li1.2Ni0.13Co0.13Mn0.54O2 |
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| Abstract: | Li1.2Ni0.13-x/3Co0.13-x/3Mn0.54-x/3CrxO2 (x=0,0.01,0.02,0.03) cathode materials were prepared by high temperature solid state method with the characters of uniform particle size distribution,high crystallization degree and excellent structural stability.Li1.3Ni0.13-x/3Co0.13-x/3Mn0.54-x/3CrxO2 (x=0.02) was discharged at 0.1 C,0.2 C,0.5 C,1 C and 2 C with specific capacity of 332.11,308.86,271.06,191.56,113.92 mAh/g.After 50th cycles at 0.1 C,the capacity retention is 97％.Therefore,Li1.2i0.13Co0.13Mn0.54O2 doped Cr shows better cycling stability,rate performance and cyclic stability. |
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| Keywords: | cathode material electrochemical characterization Li1.2Ni0.13Co0.13Mn0.54O2 Cr doping |
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