标题：Solid-state synthesis of uniform Li2MnSiO4/C/graphene composites and their performance in lithium-ion batteries
作者：Gong, Huaxu ;Zhu, Yongchun ;Wang, Linlin ;Wei, Denghu ;Liang, Jianwen ;Qian, Yitai
作者机构：[Gong, Huaxu ;Zhu, Yongchun ;Wang, Linlin ;Wei, Denghu ;Liang, Jianwen ;Qian, Yitai ] Hefei National Laboratory for Physical Science at Microscale, De 更多
来源：Journal of Power Sources
摘要：Uniform nanospherical Li2MnSiO4/C/graphene composites have been obtained by polyethylene glycol-600 (PEG-600) assisted solid-state reaction using spherical SiO2as precursor, and heat treatment with the mixed carbon sources (glucose, cellulose acetate and graphene oxide). The transmission electron microscope (TEM) images show that Li2MnSiO4nanospheres with size of 50 nm are embedded in the three-dimensional (3D) nest-like carbon network. Electrochemical measurements reveal that the composites exhibit first discharge capacity of 215.3 mAh g-1under 0.05 C, together with a stable discharge capacity of 175 mAh g-1after 40 cycles. The 3D carbon network and the carbon layer (amorphous carbon and graphene) are favorable for improving the electrochemical performance. © 2013 Elsevier Ltd. All rights reserved.