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High-capacity germanium-based anode materials are alternative materials for outstanding electrochemical performance lithium-ion batteries (LIBs), but severe volume variation and pulverization problems during charging–discharging processes can seriously affect their electrochemical performance. In addressing this challenge, a simple strategy was used to prepare the self-assembled GeOX/Ti3C2TX composite in which the GeOX nanoparticles can grow directly on Ti3C2TX layers. Nanoscale GeOX uniformly renucleates on the surface and interlayers of Ti3C2TX, forming the stable multiphase structure, which guarantees its excellent electrochemical performance. Electrochemical evaluation has shown that the rate capability and reversibility of GeOX/Ti3C2TX are both greatly improved, which delivers a reversible discharge specific capacity of above 1400 mAh g–1 (at 100 mA g–1) and a reversible specific capacity of 900 mAh g–1 after 50 cycles while it still maintains a stable specific capacity of 725 mAh g–1 at 5000 mA g–1. Furthermore, the composite exhibits an exceptionally superior rate capability, making it a good electrochemical performance anode for LIBs.

Silicon dioxide (SiO 2 ) has great potential application as anode materials for lithium-ion battery owing to the rich resource, economic cost, and easy preparation. SiO 2 /Ti 3 C 2 (ST-1, ST-2, and ST-3, respectively) nano-/microcomposites were synthesized via three different methods (sol-gel, centrifugal-drying, and freeze-drying method), and the SEM results indicate that abundant SiO 2 particles are distributed on the modified surface of multilayer Ti 3 C 2 nanosheets, forming stable multiphase structures. Electrochemical results demonstrate that the SiO 2 /Ti 3 C 2 composites can deliver good electrochemical performance and almost have no capacities decay after hundreds of cycles. In particular, the structure properties of ST-3 composite synthesized by freezedrying were well preserved, delivering a reversible discharge capacity of 242.4 mAh g −1 at 100 mA g −1 , even after high-rate test (5000 mA g −1 ), still exerting 258.6 mAh g −1 reversible discharge capacity at 100 mA g −1 , indicating good structural stability and electrochemical reversibility of ST-3 composite for lithium-ion batteries.Keywords Ti 3 C 2 . SiO 2 . Anode material . Lithium-ion battery * Jun-chao Zheng