Capacity fade characteristics of nickel-based lithium-ion secondary battery after calendar deterioration at 80 °C

JOURNAL OF POWER SOURCES

卷:501

Article

Du, Yating¹  Fujita, Kosuke¹  Shironita, Sayoko¹  Sone, Yoshitsugu²  Hosono, Eiji^1,3  Asakura, Daisuke^1,3  Umeda, Minoru¹ 

[1] Nagaoka Univ Technol, Dept Mat Sci & Technol, 1603-1 Kamitomioka, Nagaoka, Niigata 9402188, Japan

[2] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chou Ku, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 2525210, Japan

[3] Natl Inst Adv Ind Sci & Technol, Inst Energy Conservat, 1-1-1 Umezono, Tsukuba, Ibaraki 3058568, Japan

关键词: Nickel-based lithium-ion secondary cell;    High temperature;    Calendar aging;    Capacity fade;    Electrochemical characterization;    Post-mortem analysis;   

DOI  :  10.1016/j.jpowsour.2021.230005

来源: Elsevier

【 摘 要 】

In this study, we evaluated the calendar deterioration behavior of nickel-based lithium-ion secondary batteries by storing them at 80 degrees C for different durations. The results indicate that the battery capacity decreased with the increasing number of storage days in a high-temperature environment. From the differential capacity curves, we found that the change in the overvoltage, which was caused by the electrode reaction, that appeared at approximately 4.2 V was most significant. To analyze this phenomenon, electrochemical impedance spectroscopy of the deteriorated battery was measured at 4.2 V, and it was confirmed that the cathode-based resistance of the battery increased significantly at this potential. Furthermore, post-mortem analysis revealed that the cathode active material of the tested batteries clearly deteriorated; however, no significant change in the active material in the anode was observed. Therefore, it is considered that the cathode materials of nickel-based lithium-ion secondary batteries deteriorate by storing at 80 degrees C, thereby resulting in reduced battery capacity and increased cathode component resistance after storing at high temperatures.

【 授权许可】

Free