High mass loading NiCo–OH nanothorns coated CuO nanowire arrays for high-capacity nickel–zinc battery

Abstract

The rational design of cathode materials with core–shell heterostructures is significant to develop a Ni//Zn battery with both high gravimetric and areal energy density under high mass loading. In this work, the NiCo–OH nanothorns with a mass loading of 11.6 mg cm−2 were coated on CuO nanowire arrays via a chemical bath deposition method. Thanks to the construction of 3D core–shell nanowire arrays and appropriate cobalt doping, as-fabricated Ni//Zn battery based on the NiCo–OH as cathode achieved the maximum specific capacity of 383 mAh g−1 at 5 mA cm−2 with high energy density of 649 Wh kg−1 at 0.73 kW kg−1, indicating good energy storage performance in Ni//Zn battery.

Uniform zinc-ion deposition regulated by thin sulfonated poly(ether ketone) layer for Stabilizing Zn anodes

“…Because of their environmental friendliness, affordability, and high level of aqueous electrolyte safety, aqueous Zn ion batteries (AZIBs) have drawn increasing amounts of interesting [7][8][9]. Various kinds of Zn metal batteries (such as Znair and Zn-Ni batteries) have made great progress over the past few decades, but modern rechargeable Zn batteries with alkaline electrolytes still face some insurmountable difficulties, such as serious side reactions (hydrogen evolution reactions and surface passivation), shape changes, and dendrite growth [10][11][12][13]. Recently, it has been discovered that the use of mild electrolytes in Zn metal batteries can alleviate the problem of Zn anodes to some extent [14][15][16][17].…”

“Two Birds with One Stone”: F Doping Ni–Co Hydroxide as High-Performance Cathode Material for Aqueous Zn Batteries

“…Furthermore, heteroatom doping is an effective approach to regulate the material composition for better electrical conductivity and electrochemical activity [ 17 , 18 , 19 ]. Qiao and coworkers reported NiCo–OH nanothorns coated CuO nanowire arrays as cathode materials; the 3D construction allows an effective exposure of the active material in electrolytes and provides more reaction sites to promote electrochemical reactions on the cathode [ 20 ]. Xie and coworkers demonstrated hierarchical NiCo 2 O 4 @CoMoO 4 @Co 3 O 4 arrayed structures for AZBs, and such an electrode design possesses abundant electrochemical active sites and facile ion diffusion towards high performance [ 21 ].…”