@article{Zhang2026, 
author = {Kai Zhang and Xuanzhi Mao and Chaowei Luo and Wei Yan and Yiwen Long and Maojiang Zhang and Jie Gan and Hongyan Zeng and Mingxing Zhang and Guozhong Wu},
title = {Radiation-induced in situ synthesis of Ni anchored MoO3 with oxygen vacancy for high-performance pseudocapacitor},
year = {2026},
journal = {Nano Research},
volume = {19},
number = {1},
pages = {94907947},
keywords = {oxygen vacancy, single atoms, pseudocapacitor, γ-ray radiation, reduced MoO3},
url = {https://www.sciopen.com/article/10.26599/NR.2025.94907947},
doi = {10.26599/NR.2025.94907947},
abstract = {Introduction of active centers, such as oxygen vacancy and metal single atoms, has emerged as a promising strategy to further improve the electrochemical properties of transition metal oxide electrodes for high-performance pseudocapacitors. Here, an unprecedented MoO3 with multiple active centers, Ni anchored reduced MoO3 with oxygen vacancy (Ni-rMoO3−x), was in situ synthesized via γ-ray radiation-induced one-pot strategy under ambient conditions. This approach leverages the synergistic effects of radiation activation, etching, and reduction. The characteristics of multiple valence states (Mo4+/5+/6+ and Ni0/2+), oxygen vacancies, single atoms, and atomic clusters in Ni-rMoO3−x were determined by X-ray photoelectron spectroscopy (XPS), X-ray absorption fine structure spectroscopy (XAFS), and atomic-resolution aberration-corrected high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) measurements. Notably, Ni-rMoO3−x exhibited exceptional pseudocapacitive performance, with ultrahigh specific charge (881.0 C·g−1 at 1 A·g−1, more than twice that of MoO3), fast charge/discharge rates, and remarkable cycle life stability (98.5% capacitance retention after 10,000 cycles). Furthermore, a hybrid supercapacitor device (Ni-rMoO3−x//activated carbon (AC)) demonstrated a high energy density of 97.8 Wh·kg−1 at a power density of 0.90 kW·kg−1 and exhibited excellent mechanical flexibility for practical applications.}
}