Enhanced lithium storage performance of anodes for lithium-ion batteries with biscuit-shaped LaNiO3-NiO/g-C3N4 composites

• Published in: Journal of alloys and compounds 2024-03, Vol.976, p.173039, Article 173039
• Main Authors: Huang, Jian, Hu, Lin, Xu, Hui, Yang, Zhong, Li, Jianping, Wei, Yongxing
• Format: Article
• Language: English
• Subjects: Anode; Biscuit-shaped materials; LaNiO3-NiO/g-C3N4 composites; Lithium-ion battery; Perovskite oxides
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2023.173039

The significance of lithium-ion batteries in our daily lives cannot be overstated, and the advancement of anode materials is instrumental in achieving battery systems with remarkable energy and power density. Perovskite-type oxides with high theoretical capacity and environmental friendliness have received attention, their poor conductivity and bulk effect urgently need to be improved. With graphene-like layered structure, the rich nitrogen content of g-C3N4 can improve the wettability of the electrode and electrolyte, thus improving the lithium charge transfer process. Therefore, we demonstrated that LaNiO3 is the major phase in the LaNiO3-NiO composites with 80.57% and NiO is the sub-phase with 19.43% using Rietveld XRD refinement treatment. The theoretical capacity of the composites was calculated to be 666.8 mAh g−1 combining the respective theoretical capacities of the two phases. Subsequently, the Biscuit-shaped LaNiO3-NiO/g-C3N4 composite was prepared, which showed excellent electrochemical performance when used as an anode material for lithium-ion batteries. The LaNiO3-NiO/g-C3N4 electrodes exhibit excellent rate performance (with 154.5 mAh g−1 at 10 A g−1) and cycling stability (with 502.5 mAh g−1 for 900 cycles at 1.0 A g−1). This work is believed to provide new ideas for the design and synthesis of perovskite oxide materials in the future. [Display omitted] •Biscuit-Shaped LaNiO3-NiO/g-C3N4 composites were constructed.•The percentage of LaNiO3 and NiO phase was analyzed via refinement of XRD.•Exploring the mechanism behind the excellent performance via constructive modeling to simulate the lithiation process.•The unique architecture alleviates volume expansion and benefits rapid Li+ diffusion.