School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510641, China.
Nanoscale. 2014 Jul 21;6(14):8350-8. doi: 10.1039/c4nr00921e.
A facile one-step route was developed to synthesize crystalline CuGeO₃ nanowire/graphene composites (CGCs). Crystalline CuGeO₃ nanowires were tightly covered and anchored by graphene sheets, forming a layered structure. Subsequently, CGCs were exploited as electrode materials for lithium ion batteries (LIBs). The reversible formation of Li₂O buffer layer and elastic graphene sheets accommodated the volume change during the charge and discharge processes. CGC containing 37 wt% graphene exhibited a superior electrochemical performance, that is, a remarkable reversible capacity (1265 mA h g(-1) for the first cycle), an outstanding cyclic performance (853 mA h g(-1) after 50 cycles under a current density of 200 mA g(-1)), a high coulombic efficiency, and an excellent rate capability. Clearly, CGCs may stand out as a promising anode material for LIBs.
一种简便的一步法被开发用来合成结晶的 CuGeO₃ 纳米线/石墨烯复合材料（CGCs）。结晶的 CuGeO₃ 纳米线被石墨烯片紧密地覆盖和固定，形成层状结构。随后，CGCs 被用作锂离子电池（LIBs）的电极材料。Li₂O 缓冲层和弹性石墨烯片的可逆形成在充放电过程中容纳了体积变化。含有 37wt%石墨烯的 CGC 表现出优异的电化学性能，即显著的可逆容量（首次循环 1265 mA h g(-1)）、出色的循环性能（在 200 mA g(-1)的电流密度下 50 次循环后为 853 mA h g(-1)）、高库仑效率和优异的倍率性能。显然，CGCs 可能是一种很有前途的 LIBs 用阳极材料。
