Copper oxide@cobalt oxide core–shell nanostructure, as an efficient binder-free anode for lithium-ion batteries

Abstract

Here, cobalt oxide nanostructures synthesized on vertically aligned copper oxide nanowires (NWs) have been investigated as a possible anode material for Lithium-ion batteries (LIBs). Copper oxide NWs were formed by thermal oxidation of electrochemically deposited copper on the stainless steel mesh substrate. The process used allows the formation of highly dense copper oxide NWs with excellent adhesion to the conductive current collector substrate. A simple hydrothermal method was implemented for the deposition of cobalt oxide nanostructures on the copper oxide NWs. The as-prepared binder-free copper oxide@cobalt oxide NWs electrode exhibits a high initial specific capacity of 460 mAh g−1 at a current density of 148 mA g−1. The fabricated core–shell structure effectively improved the capacity of the fabricated half-cell by four times after 30 cycles, compared with bare copper oxide NWs. In addition to its straightforward and inexpensive synthesis process, the improved electrochemical performance suggests the copper oxide@cobalt oxide NWs electrode as a potential anode material for advanced LIBs.

Superior performance of silicon nanowires@void@carbon on a conductive substrate as a scalable binder-free anode electrode for lithium-ion batteries

“…[7][8][9][10][11][12] In this regard, a great deal of research has been focused on creating batteries with increased specic energy, capacity, and safety. [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] It has been proven that LIBs with silicon-based anodes are capable of supporting these benets if properly engineered, and therefore, aer an enormous amount of investment and research in this eld, they have now found their way into commercial LIBs. [31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49] Silicon-based anodes have been successfully employed in LIBs by nding solutions for their enormous volume change, unstable solid electrolyte interface (SEI) layer, and low electrical conductivity.…”

“…7–12 In this regard, a great deal of research has been focused on creating batteries with increased specific energy, capacity, and safety. 13–30…”