Ya-Meng Yin

1 Introduction Sodium-ion batteries (SIBs) are gradually being recognized as a competitive battery technology in the field of large-scale electrical energy storage systems because of the abundant resources, low cost, high safety, and environmental friendliness [1]. Crucial to SIBs, cathode materials determine the overall battery performance, particularly governing the energy density and high rate cycling stability [2].

Na3(VO)2(PO4)2F (NVOPF) has emerged as one of the most promising cathode materials for sodium-ion batteries (SIBs) attributed to its high specific capacity (130 mAh g−1), high operation voltage (>3.9 V vs Na+/Na), and excellent structural stability (<2% volume change). However, the comparatively low intrinsic electronic conductivity (≈10−7 S cm−1) of NVOPF leads to unsatisfactory electrochemical performance, especially at high rates, limiting its practical applications.

Ar plasma assists in enhanced oxygen evolution kinetics of MOG-derived multicomponent transition metal sulfides† Jia-Yang Luo,ab Ya-Meng Yin,*ab Gui-Zhi Guo,a Xi-Wen Chang,a Xue-Qian Wu,ab Ya-Pan Wu, ab Shuang Li,ab Ru-An Chib and Dong-Sheng Li *ab Abstract Transition metal sulfides are low-cost oxygen evolution reaction (OER) electrocatalysts that can potentially substitute noble metal catalysts. However, the adsorption process of their OER is impeded by their intrinsic poor catalytic activity.