Stereotaxically Constructed Graphene Modification of CuO-Cu2O/TiO2 Microspheres for Boosted Lithium and Sodium Storage Performance

• Published in: Journal of electronic materials Vol. 51; no. 1; pp. 47 - 56
• Main Authors: Huang, Yizhong, Liang, Juli, Xu, Meng, Lei, Jiawei, Huo, Xiaoyu, Ye, Debin, Zhang, Shifan, Wu, Xuehang, Wu, Wenwei
• Format: Journal Article
• Language: English
• Published: New York Springer US 2022; Springer Nature B.V
• Subjects: Anatase; Anodes; Characterization and Evaluation of Materials; Chemistry and Materials Science; Copper oxides; Electrode materials; Electronics and Microelectronics; Graphene; Hydrothermal treatment; Instrumentation; Lithium-ion batteries; Materials Science; Microspheres; Optical and Electronic Materials; Original Research Article; Rechargeable batteries; Sodium; Solid State Physics; Titanium dioxide; O/TiO; stereotaxically constructed grapheme; composite; Li-ion battery; CuO-Cu; anode material; Na-ion battery
• ISSN: 0361-5235; 1543-186X
• DOI: 10.1007/s11664-021-09196-w

A facile hydrothermal approach has been developed to synthesize a CuO-Cu 2 O/TiO 2 /stereotaxically constructed graphene (SCG) composite, which involves two main steps: the creation of anatase TiO 2 microspheres and the formation of the CuO-Cu 2 O/TiO 2 /SCG composite by a subsequent one-step hydrothermal treatment, in which CuO-Cu 2 O and TiO 2 particles adhere to SCG. The design of combining CuO-Cu 2 O with the TiO 2 and SCG layers is favorable to enhancing electronic conductivity and buffering the severe volume change. When assembled as anode materials for Li-ion batteries (LIBs) and Na-ion batteries (SIBs), the CuO-Cu 2 O/TiO 2 /SCG composite exhibits excellent capacity of 797.4 mA h g −1 at 0.1 A g −1 after 100 cycles for LIBs and 354.7 mA h g −1 at 0.1 A g −1 after 50 cycles for SIBs. An exceptional rate capability is also obtained: 782.8 and 578.1 mA h g −1 at 0.3 and 2 A g −1 for LIBs, respectively; 390.6 and 329.9 mA h g −1 at 0.3 and 0.5 A g −1 for SIBs, respectively. Graphic Abstract