Cation-exchange and oxygen vacancies triggered capacity in hierarchical α-Ni_1−xCu_xMoO₄@CC flexible electrodes for energy-storage applications

Abstract

Development of hierarchical nano/microarchitectures and cation-doping strategies enhancing the electrochemical activity for supercapacitors have been well established. However, creating oxygen vacancies (OV) during the metal cation-exchange process could intrinsically modify...

Oxygenated copper vanadium selenide composite nanostructures as a cathode material for zinc-ion batteries with high stability up to 10 000 cycles

“…In particular, the peaks observed between 530.89 and 532 eV revealed the successful formation of oxygen vacancies in the CuVSe (to form O–CuVSe) sample. 46,77 The electrical conductivity of the CuVSe cathode can be altered due to the oxygen vacancies which act as open channels for the (de)-insertion of Zn 2+ . 46…”

“…In particular, the peaks observed between 530.89 and 532 eV revealed the successful formation of oxygen vacancies in the CuVSe (to form O-CuVSe) sample. 46,77 The electrical conductivity of the CuVSe cathode can be altered due to the oxygen vacancies which act as open channels for the (de)-insertion of Zn 2+ . 46 To evaluate the morphology of the O-CuVSe composite cathode material after the cycling process, the FE-SEM analysis was performed after the 1 st charge/discharge, 15 th charge/discharge, and 1000 th charge cycles, as shown in Fig.…”

Cationic vacancies and interface engineering on crystalline–amorphous gamma-phase Ni–Co oxyhydroxides achieve ultrahigh mass/areal/volumetric energy density flexible all-solid-state asymmetric supercapacitor

“…Nowadays, the increasing demand for portable electronic devices has presented a new challenge in the area of novel energy storage devices, among which all-solid-state asymmetric supercapacitors (ASCs), which exhibit excellent portability and fast charge-discharge characteristics, have been demonstrated as efficient energy storage devices. [1][2][3][4][5] However, all-solid-state ASC devices usually exhibit low energy density, limiting their large-scale applications. Moreover, producing high-energydensity all-solid-state ASCs typically requires an electrode material with abundant redox active sites and developed electrical percolative networks.…”

Overview of the oxygen vacancy effect in bimetallic spinel and perovskite oxide electrode materials for high-performance supercapacitors

“…This strategy has been performed successfully by many research groups in recent years. [48][49][50][51] For instance, Chakraborty et al reviewed the importance of OVs in single metal oxides and metal oxide/carbon hybrid electrodes in the SC research field. 52 Furthermore, the same research group summarized the implementation of some in situ/ operando spectroscopic techniques to evaluate the charge storage mechanism in bimetal oxides for energy storage applications.…”