Electrochemical performance and reaction mechanism of the Li₂MoO₃ anode synthesized by ball milling and thermal reduction for lithium-ion batteries

详细信息    查看全文

• 作者：Hongyan He^b ; Dan Li^b ; Mingqi Li^a ; ^b ; ^{lmingq888@aliyun.com}
• 关键词：Lithium sub-molybdate ; Lithium-ion battery ; Anode ; Electrochemical performance ; Reaction mechanism
• 刊名：Electrochimica Acta
• 出版年：2017
• 出版时间：10 January 2017
• 年：2017
• 卷：224
• 期：Complete
• 页码：1-8
• 全文大小：1844 K
• 卷排序：224

文摘

Because of high lithium storage capacity, high first coulombic efficiency and low cost, Li2MoO3 has become a very attractive anode material for lithium-ion batteries. However, its cycling stability and severe polarization need further improvement. Besides, its reaction mechanism is unclear. In this work, Li2MoO3 is synthesized through ball milling and thermal reduction, and its electrochemical performance and reaction mechanism are investigated as anodes for lithium-ion batteries. The synthesized Li2MoO3 shows excellent cycling stability with high capacity. At a current density of 100 mA g−1, it presents a first discharge capacity of about 835 mAh g−1 with an initial coulombic efficiency of 97.6%. After 150 cycles, a discharge capacity of 902 mAh g−1 is preserved. At a current density of 1600 mA g−1, the compound exhibits a stable discharge capacity of about 556 mAh g−1. It is revealed that the synthesized Li2MoO3 follows mixed insertion/conversion reaction mechanism.