Abstract In the present paper, impedance measurements of the battery configuration, Anode│lithium borophosphate glass electrolyte│LiCoO2 cathode, has been carried out to throw some light on the electrochemical interfacial behavior between the chosen electrodes and electrolyte. The cathode material, lithium cobalt oxide (LiCoO2) has been prepared by three different techniques and characterized. Sol-gel synthesized LiCoO2 showed uniformly distributed spherical shape particles with an average size of 500 nm and also exhibited better electrochemical performance. Charging and discharging (2–3 cycles) of the battery indicated an OCV of 2 V. However, the theoretical OCV of 4 V could not be achieved. The poor performance of the battery could be attributed to the electrochemical processes and SEI film formation at the electrode/electrolyte interfaces. Impedance spectroscopy shows that the major contributions to the impedance of the battery are the electrolyte resistance and the electrode/electrolyte interfacial resistance. With each recharging cycle, the value of electrolyte resistance remains almost constant; however, the interface resistance increases, during the passage of current, due to the interfacial passive layer formation.

中文翻译：

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通过阻抗谱研究电极/电解质界面

摘要 在本文中，电池配置的阻抗测量，阳极│硼磷酸锂玻璃电解质│LiCoO2 阴极，已经进行，以揭示所选电极和电解质之间的电化学界面行为。正极材料钴酸锂 (LiCoO2) 已通过三种不同的技术制备和表征。溶胶-凝胶合成的 LiCoO2 显示出均匀分布的球形颗粒，平均粒径为 500 nm，并表现出更好的电化学性能。电池的充电和放电（2-3 次循环）表明 OCV 为 2 V。但是，无法实现 4 V 的理论 OCV。电池性能不佳可能归因于电化学过程和电极/电解质界面处的 SEI 膜形成。阻抗谱表明，对电池阻抗的主要贡献是电解质电阻和电极/电解质界面电阻。在每次充电循环中，电解液电阻值几乎保持不变；然而，在电流通过期间，由于界面钝化层的形成，界面电阻会增加。