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首页> 外文期刊>Journal of power sources >The effect of compositional change of transition metals on the electrochemical behavior of layered LiMO_2(M = Li_wNi_xCo_y;Mn_z)
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The effect of compositional change of transition metals on the electrochemical behavior of layered LiMO_2(M = Li_wNi_xCo_y;Mn_z)

机译：过渡金属组成变化对层状LiMO_2（M = Li_wNi_xCo_y; Mn_z）电化学行为的影响

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摘要

Seven compositions of LiMO_2 (M = Li_wNi_xCo_yMn_z) (w = 1/15- 1/6;x = 0-3/10; y= 1/5-1/2; z= 13/30-1/3; i.e. w+x + y + z = 1) solid solutions were synthesized using the sol-gel method with the following end members LiCoO_2, Li_2MnO_3(Li[Li_(1/3)Mn_(2/3)]O_2), and Li[Ni_(0.5)Mn_(0.5)]O_2. The electrochemical behavior of the solid solutions was analyzed for the various compositions of metals in transition metal sites. All synthesized particles were semi-spherically shaped with a layered structure. When the content of lithium and cobalt was reduced (while the other metals were increased), the lattice parameters, a and c, decreased and were accompanied by a shift in the Raman spectrum. The cycling studies reveal that the compound, Li[Li_(1/12)Ni_(1/4)Co_(1/4)Mn_(5/12)]O_2 was found to be optimal in voltage and from a stability point of view.
机译：LiMO_2的七种成分（M = Li_wNi_xCo_yMn_z）（w = 1 / 15-1 / 6; x = 0-3 / 10; y = 1 / 5-1 / 2; z = 13 / 30-1 / 3;即w + x + y + z = 1）使用溶胶-凝胶法合成固溶体，其中固溶体具有以下端基LiCoO_2，Li_2MnO_3（Li [Li_（1/3）Mn_（2/3）] O_2）和Li [Ni_ （0.5）Mn_（0.5）] O_2。对于过渡金属位点中金属的各种组成，分析了固溶体的电化学行为。所有合成的颗粒均为半球形，具有分层结构。当锂和钴的含量减少（而其他金属增加）时，晶格参数a和c降低，并伴有拉曼光谱的移动。循环研究表明，发现化合物Li [Li_（1/12）Ni_（1/4）Co_（1/4）Mn_（5/12）] O_2在电压和稳定性方面均是最佳的。

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