The present work unveils the facile solvothermal synthesis of nanocrystallite assembled La₂CoNiO₆ nanorods via calcination process. The Rietveld refinement confirmed the formation of monoclinic phase with P2₁/n symmetry. The stable porous nanorods of La₂CoNiO₆ with naturally self-assembled nanocrystallite aggregates are observed via high-resolution transmission electron micrographs. The specific surface area of ~ 32 m²/g has been achieved via Brunauer–Emmett–Teller analysis with average pore size of diameter ~ 5 nm via Barrett-Joyner-Halenda analysis. The nanocrystallite assembled La₂CoNiO₆ nanorods exhibited specific capacitance as 635.5 F/g at current density of 1 A/g, with retention of ~ 75% after 5000 cycles at constant high current density of 5 A/g via solvothermal approach followed by calcination.

Graphical abstract

中文翻译：

---

纳米微晶组装的 La2CoNiO6 纳米棒通过简便的溶剂热途径制备以提高电化学性能

目前的工作揭示了通过煅烧过程轻松溶剂热合成纳米微晶组装的 La ₂ CoNiO ₆纳米棒。Rietveld 精修证实了具有P2 ₁ /n对称性的单斜相的形成。通过高分辨率透射电子显微照片观察到具有自然自组装纳米微晶聚集体的稳定的 La ₂ CoNiO ₆多孔纳米棒。~ 32 m ² /g的比表面积已通过 Brunauer-Emmett-Teller 分析实现，平均孔径为 ~ 5 nm，通过 Barrett-Joyner-Halenda 分析。纳米晶组装的 La ₂ CoNiO ₆ 纳米棒在 1 A/g 的电流密度下表现出 635.5 F/g 的比电容，在 5 A/g 的恒定高电流密度下通过溶剂热法随后煅烧，在 5000 次循环后保留率约为 75%。

图形概要