论文成果
Interface regulation strategy in constructing NiO@TiO2 heterostructure with enhanced surface reaction dynamics for robust lithium-ion storage
- 发布时间：2025-07-14
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- 关键字：OXIDE-ASSISTED SYNTHESIS; ANODE MATERIAL; NANOSHEETS; NANOTUBES; INSIGHTS; MOS2
- 摘要：Rationally regulated electrodes with outstanding electrochemical performance are crucial for lithium-ion storage. In this work, the heterogeneous electrode is structured through sol-gel synthesis NiO nanoparticles on the TiO2 particles (NiO@TiO2). The close interfacial contact between NiO and TiO2 is directly observed by Transmission Electron Microscope (TEM) analysis, and the intense chemical bonding interaction is confirmed by XPS analysis via the formed interfacial bond (Ni-O-Ti). The distinct interatomic electron migration is also interpreted through density functional theory (DFT). The discharge capacity at 0.1 A g-1 of this well-designed NiO@TiO2 electrode can reach up to 1355 mA h g-1, and the capacity retention rate is approximately 62 % after 2000 cycles at 1.0 A g-1, showing its good capacity retention and structural stability. The kinetics study confirms the enhanced lithium-ion storage dynamics and electronic conductivity. Ex-situ X-ray diffractometer (XRD) and XPS analyses show the cycling stable and stepwise cycling reaction mechanism of the NiO@TiO2 electrode. DFT analysis shows that lithium-ion adsorption and migration ability are enhanced owing to the apparent electron redistribution at the interface. This interface engineering strategy offers a promising approach to enhance the lithium-ion energy storage capacity and performance of oxide-based electrodes.
- 卷号：1031
- 期号：
- 是否译文：否