首页> 外文期刊>Chemistry: A European journal >Lithium-Rich Layered Oxide Li1.18Ni0.15Co0.15Mn0.52O2 as the Cathode Material for Hybrid Sodium-Ion Batteries
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Lithium-Rich Layered Oxide Li1.18Ni0.15Co0.15Mn0.52O2 as the Cathode Material for Hybrid Sodium-Ion Batteries

机译:富锂层状氧化物Li1.18Ni0.15Co0.15Mn0.52O2作为混合钠离子电池的正极材料

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摘要

rich layered oxide Li1.18Ni0.15Co0.15Mn0.52O2 (LNCM) is, for the first time, examined as the positive electrode for hybrid sodium-ion battery and its Na+ storage properties are comprehensively studied in terms of galvanostatic charge-discharge curves, cyclic voltammetry and rate capability. LNCM in the proposed sodium-ion battery demonstrates good rate capability whose discharge capacity reaches about 90 mAhg(-1) at 10 C rate and excellent cycle stability with specific capacity of about 105 mAhg(-1) for 200 cycles at 5 C rate. Moreover, ex situ ICP-OES suggests interesting mixed-ions migration processes: In the initial two cycles, only Li+ can intercalate into the LNCM cathode, whereas both Li+ and Na+ work together as the electrochemical cycles increase. Also the structural evolution of LNCM is examined in terms of ex situ XRD pattern at the end of various charge-discharge scans. The strong insight obtained from this study could be beneficial to the design of new layered cathode materials for future rechargeable sodium-ion batteries.
机译:首次将富层状氧化物Li1.18Ni0.15Co0.15Mn0.52O2(LNCM)用作混合钠离子电池的正极,并根据恒电流充放电曲线全面研究了其Na +储存性能,循环伏安法和速率功能。拟议的钠离子电池中的LNCM表现出良好的倍率能力,其在10 C速率下的放电容量达到约90 mAhg(-1),并具有出色的循环稳定性,在5 C速率下200次循环的比容量约为105 mAhg(-1)。此外,非原位ICP-OES提出了有趣的混合离子迁移过程:在最初的两个循环中,只有Li +可以插入LNCM阴极,而Li +和Na +随电化学循环的增加而协同工作。此外,在各种充放电扫描结束时,根据异位XRD模式检查了LNCM的结构演变。从这项研究中获得的深刻见识可能有助于设计用于未来可充电钠离子电池的新型分层阴极材料。

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