Hollow nanostructured NiO particles as an efficient electrode material for lithium-ion energy storage properties

• Published in: RSC advances Vol. 13; no. 32; pp. 227 - 2216
• Main Authors: Hwang, Young Geun, Nulu, Venugopal, Nulu, Arunakumari, Sohn, Keun Yong
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 19.07.2023; The Royal Society of Chemistry
• Subjects: Activated carbon; Anodes; Chemistry; Electrochemical analysis; Electrode materials; Electrodes; Energy storage; Ion storage; Lithium ions; Nanostructure; Nanostructured materials; Nickel oxides; Rechargeable batteries; Storage batteries; Supercapacitors
• ISSN: 2046-2069; 2046-2069
• DOI: 10.1039/d3ra03467d

This work has developed a straightforward approach to obtaining NiO hollow structures by using Li 2 O 2 as an easily removable template. The easy availability and electrochemically active nature of NiO have attracted researchers' attention as an anode electrode for Li-ion storage applications, including Li-ion secondary batteries (LIBs) and for Li-ion hybrid supercapacitors (LiHSCs; which offer higher power densities than LIBs without compromising energy density). However, NiO usage has been limited to its low reaction reversibility, poor conductivity, and conversion reaction capability. Recently, hollow nanostructured materials have attracted attention as efficient battery materials due to their fascinating structural features. This study presents a modified Li 2 O 2 -assisted method to obtain porous open 3D architectures of NiO nanostructures. The resultant hollow structures are electrochemically studied as an anode for a LIB, exhibiting excellent stability over hundreds of cycles. The result is recognized as one of the finest among NiO anodes reported. Also, NiO hollow structures studied as anodes for LiHSC devices fabricated with activated carbon cathodes exhibit an outstanding comprehensive electrochemical performance which is better than the typical LIB and supercapacitors. A facile non-aqueous chemical approach was employed for the synthesis of NiO porous hollow structures by using an easily water washable template. These hollow particles are greatly beneficial to the Li-ion battery and Li-ion hybrid supercapacitors.