Hierarchical mesoporous NiCo2O4 hollow nanocubes for supercapacitors
文献信息
Chuanbao Cao, Jianhua Hou, Huazhang Zhai
In the present work, mesoporous NiCo2O4 hollow nanocubes are synthesized using a “coordinating etching & precipitating” (CEP) route. The hollow nanocubes are characterized using SEM, TEM, XRD, XPS and BET methods. The hollow nanocubes have a uniform morphology of 300–500 nm, a high surface area of 134.52 m2 g−1 and a mesoporous structure of 2.4–6 nm. These mesoporous NiCo2O4 hollow nanocubes exhibit the specific capacitance of 795.6 F g−1 at a constant discharge current density of 1 A g−1. The high specific capacitance and the stability of the NiCo2O4 hollow nanocube electrode are attributed to its large specific surface area and mesoporous structure. The specific capacity retention is 97.5% at a current density of 1 A g−1 and 96.1% at a current density of 2 A g−1 over 2000 charge–discharge cycles. The high specific capacitance and excellent cyclic stability indicate that NiCo2O4 hollow nanocubes are excellent supercapacitor electrode materials.
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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.




