Hydrothermal synthesis of rod‐like CoMoO4 and its excellent properties for the anode of lithium‐ion batteries,Journal of the Chinese Chemical Society

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Hydrothermal synthesis of rod‐like CoMoO4 and its excellent properties for the anode of lithium‐ion batteries
Journal of the Chinese Chemical Society ( IF 1.6 ) Pub Date : 2020-06-14 , DOI: 10.1002/jccs.202000040
Qingnan Feng ₁ , Xinlu Wang ₁ , Huan Zhang ₁ , Jinxian Wang ₁ , Guixia Liu ₁ , Wensheng Yu ₁ , Xiangting Dong ₁

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CoMoO₄ has attracted extensive interest as an anode for lithium‐ion batteries due to its high theoretical capacity and low cost. Nevertheless, achieving controlled synthesis of CoMoO₄ with definite morphology by simply adjusting a certain synthesis condition is a very meaningful topic. Here, rod‐like CoMoO₄ formed by lamellar stacking was successfully synthesized through the control pH value of one‐step hydrothermal route, and its excellent electrochemical performance was investigated. The rod‐like CoMoO₄ prepared at 190°C and pH = 7 has a high initial discharge capacity of 1,482.8 mAh/g at 200 mA/g. The discharge capacity of 1,041 mAh/g was maintained after 500 cycles, and the capacity retention was 70.2%. The improved electrochemical performance of rod‐like CoMoO₄ can be attributed to the rod structures, which could shorten ion diffusion and electronic conduction pathway, provide more efficient charge storage sites, and alleviate the volume changes during Li + intercalation/deintercalation.

中文翻译：

棒状CoMoO4的水热合成及其在锂离子电池负极中的优异性能

CoMoO ₄由于其高理论容量和低成本而作为锂离子电池的负极材料引起了广泛的兴趣。然而，通过简单地调节某个合成条件来实现具有确定形态的CoMoO _4的受控合成是一个非常有意义的课题。在此，通过一步水热法控制pH值成功合成了层状堆积形成的棒状CoMoO ₄，并研究了其优异的电化学性能。棒状CoMoO ₄在190°C和pH = 7的条件下制备的200毫安/克的高初始放电容量为1,482.8 mAh / g。500次循环后维持1,041mAh / g的放电容量，容量保持率为70.2％。棒状CoMoO ₄电化学性能的提高归因于棒状结构，它可以缩短离子扩散和电子传导途径，提供更有效的电荷存储位点，并减轻Li +嵌入/脱嵌过程中的体积变化。

更新日期：2020-06-14

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