Effective enhancement of electrochemical performance for low-cost cathode material Li_1.231Mn_0.615Ni_0.154O₂ via a novel facile hydrothermal modification

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• 作者：Shi-Xuan Liao ; Yan-Jun Zhong ; Ben-He Zhong ; Heng Liu ; Xiaodong Guo
• 关键词：Cathode material ; Modification ; Lithium manganese oxide ; Lithium-ion batteries
• 刊名：Journal of Power Sources
• 出版年：2014
• 出版时间：15 January, 2014
• 年：2014
• 卷：246
• 期：Complete
• 页码：569-573
• 全文大小：1260 K

文摘

A novel facile hydrothermal modification method is applied to improve the electrochemical performance of the low-cost cathode material Li_1.231Mn_0.615Ni_0.154O₂, which is primarily prepared by a solid-combustion approach. The material before and after modifying are characterized by energy dispersive spectrometer (EDS), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), BET and high-resolution transmission electron microscopy (HRTEM). The samples are served as the cathode of lithium-ion batteries and investigated by galvanostatic experiments within a voltage range 2.0-4.8?V (vs. Li/Li⁺). The results reveal that the electrochemical performance of the Li_1.231Mn_0.615Ni_0.154O₂ cathode electrode is prominently enhanced after modifying. The significantly improved electrochemical performance of the Li_1.231Mn_0.615Ni_0.154O₂ cathode is attributed largely to the modification of the surface microstructure and the crystallinity.