Abstract
To realize flexible lithium-ion batteries (LIBs), the design of flexible electrode/current collector materials with high mechanical flexibility, superior conductivity and excellent electrochemical performance and electrical stability are highly desirable. In this work, we developed a new ternary Cd2GeO4 nanowire/graphene oxide/carbon nanotube nanocomposite (Cd2GeO4 NW/GO/CNT) film electrode. Benefiting from the efficient combination of GO and Cd2GeO4 NWs, our Cd2GeO4 NW/GO/CNT composite film exhibits a capacity of 784 mA h g−1 after 30 cycles at 200 mA g−1, which is 2.7 times higher than that of Cd2GeO4 NW/CNT film (290 mA h g−1). At a higher rate of 400 mA g−1 and 1 A g−1, the Cd2GeO4 NW/GO/CNT film delivers a stable capacity of 617 and 397 mA h g−1, respectively. Even at 2.5 A g−1, it still exhibits a high rate capacity of 180 mA h g−1. The flexible Cd2GeO4 NW/GO/CNT film clearly demonstrates good cycling stability and rate performance for anode materials in LIBs. This route may be extended to design other flexible free-standing metal germanate nanocomposite anode materials.
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