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首页> 外文期刊>RSC Advances >MgH2–CoO: a conversion-type composite electrode for LiBH4-based all-solid-state lithium ion batteries
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MgH2–CoO: a conversion-type composite electrode for LiBH4-based all-solid-state lithium ion batteries

机译：MgH2-CoO：基于LiBH4的全固态锂离子电池的转换型复合电极

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Several studies have demonstrated that MgH _(2) is a promising conversion-type anode toward Li. A major obstacle is the reversible capacity during cycling. Electrochemical co-existence of a mixed metal hydride-oxide conversion type anode is demonstrated for lithium ion batteries using a solid-state electrolyte. 75MgH _(2) ·25CoO anodes are obtained from optimized mixing conditions avoiding reactions occurring during high-energy ball-milling. Electrochemical tests are carried out to investigate the cycling capability and reversibility of the on-going conversion reactions. The cycling led to formation of a single-plateau nanocomposite electrode with higher reversibility yield, lowered discharge–charge hysteresis and mitigated kinetic effect at high C-rate compared to MgH _(2) anodes. It is believed that reduced diffusion pathways and less polarized electrodes are the origin of the improved properties. The designed composite-electrode shows good preservation and suitability with LiBH _(4) solid electrolyte as revealed from electron microscopy analyses and X-ray photoelectron spectroscopy.
机译：多项研究表明，MgH _（2）是一种有前途的向Li转化型阳极。一个主要的障碍是骑车过程中的可逆容量。对于使用固态电解质的锂离子电池，已经证明了混合金属氢化物-氧化物转化型阳极的电化学共存。 75MgH _（2）·25CoO阳极是从优化的混合条件获得的，避免了在高能球磨过程中发生反应。进行电化学测试以研究正在进行的转化反应的循环能力和可逆性。与MgH _（2）阳极相比，该循环导致形成了单平台纳米复合电极，该电极具有较高的可逆性产量，较低的充放电滞后并降低了在高C速率下的动力学效应。据信减少的扩散路径和较少的极化电极是改善的性能的起源。电子显微镜分析和X射线光电子能谱显示，设计的复合电极对LiBH _（4）固体电解质显示出良好的保存性和适用性。

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