Electrochemical characteristics of aluminum sulfide for use in lithium secondary batteries

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• 作者：Hiroshi Senoh ; Tomonari Takeuchi ; Hiroyuki Kageyama ; Hikari Sakaebe ; Masaru Yao ; Koji Nakanishi ; Toshiaki Ohta ; Tetsuo Sakai ; Kazuaki Yasuda
• 关键词：Lithium secondary battery ; Aluminum sulfide ; Charge– ; discharge curve ; Capacity retention ; X-ray diffraction ; X-ray absorption near edge structure
• 刊名：Journal of Power Sources
• 出版年：2010
• 出版时间：15 December 2010
• 年：2010
• 卷：195
• 期：24
• 页码：8327-8330
• 全文大小：278 K

文摘

In our effect to develop a lithium secondary battery with high energy density, aluminum sulfide (Al₂S₃) was studied for use as an active material. The measured initial discharge capacity of Al₂S₃ was ca. 1170 mAh g⁻¹ at 100 mA g⁻¹. This corresponds to 62 % of the theoretical capacity for the sulfide. Al₂S₃ exhibited poor capacity retention in the potential range between 0.01 V and 2.0 V, mainly due to the structural irreversibility of the charge process or Li extraction. XRD and Al and S K-XANES analyses indicated that the surface of Al₂S₃ reacts reversibly during charge and discharge processes, while the core of Al₂S₃ showed structural irreversibility because LiAl and Li₂S were formed from Al₂S₃ at the initial discharge and remained as they were afterward.