Composite electrode materials Li[Li_0.13Ni_0.2Mn_0.47Co_0.2]O₂ (LNMC)–CeO₂–С are obtained by the coprecipitation of Co, Ni, Mn and Ce hydroxides followed by the coating of LNMC–CeO₂ composites with pyrolytic carbon. The introduction of 5% CeO₂ promotes the reduction of LNMC grain size from 190–230 to 100–170 nm and the corresponding increase in the electrochemical capacity of LNMC-CeO₂ composite. The pyrolytic coating consists of the network of 2–5 nm polymer-carbon particles at the surface of LNMC crystallites. The electrochemical impedance spectroscopy data, which was performed after the galvanostatic cycling, demonstrated considerably lower charge transfer resistance of the carbon-coated composites compared to the bare LNMC and the LNMC-CeO₂ composites. The values of the discharge capacity of LNMC-CeO₂-C composites are superior to the capacity of LMNC-CeO₂ and LMNC-C composites at all discharge rates (C/10 – 5C). The increase of the upper boundary of potentials to 4.8 V after cycling at 5C (U – 2÷4.6 V) promotes the increase of low rate electrochemical capacity of LNMC-CeO₂-C composite to 220 mAh g⁻¹.

中文翻译：

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CeO2共沉淀对Li（Li，Ni，Mn，Co）O2-CeO2-C复合正极材料电化学性能的影响

复合电极材料Li [Li _0.13 Ni _0.2 Mn _0.47 Co _0.2 ] O ₂（LNMC）–CeO ₂ –С是通过共沉淀Co，Ni，Mn和Ce氢氧化物，然后通过热解涂覆LNMC–CeO ₂复合材料而获得的碳。5％CeO ₂的引入促进了LNMC晶粒尺寸从190–230 nm减小到100–170 nm，并相应地增加了LNMC-CeO ₂的电化学容量合成的。热解涂层由LNMC晶体表面的2–5 nm聚合物-碳颗粒网络组成。在恒电流循环之后进行的电化学阻抗谱数据表明，与裸露的LNMC和LNMC-CeO ₂复合材料相比，碳涂层复合材料的电荷转移阻力要低得多。在所有放电速率（C / 10 – 5C）下，LNMC-CeO ₂ -C复合材料的放电容量值均优于LMNC-CeO ₂和LMNC-C复合材料的容量。在5C（U – 2÷4.6 V）循环后，电位上限增加到4.8 V，促使LNMC-CeO ₂ -C复合材料的低倍电化学容量增加到220 mAh g^-1。