关键字：LDHS

摘要：The unmatched reaction kinetics of positive and negative electrodes of alkaline zinc batteries (AZBs) lead to their unsatisfactory energy density and stability performance. To break through the diffusion limitation of positive electrode materials, a hollow layered double hydroxides (LDHs) nanotube with 95 % water coverage area is constructed by a metal-organic frameworks (MOFs) etching strategy. The unique hierarchical porous nanotube structure can provide a linear and open one-dimensional cavity and effectively shorten the electrolyte diffusion path for enhanced diffusion rate. Meanwhile, the constructed hydrogen bond network between LDH layers may achieve Newton's cradle-type OH- jumping path for dramatically enhanced reaction kinetics. Therefore, the optimized bimetallic hydroxide hexagonal nanotube (Co/Ni-HXN-0.1) presents a high capacity of 211.53 mAh g- 1 (1523 F g- 1 ) and excellent ratio performance of maintaining 70.1 % with the current increasing 20 times. Furthermore, the assembled Co/Ni-HXN-0.1//Zn@rGO AZB delivers a high energy density of 417.98 Wh kg- 1 at a power density of 0.45 kW kg-1 , and excellent cycling stability of maintaining 70.0 % initial capacity after 3500 cycles at the current density of 10 A g- 1 .

卷号：626

期号：-

是否译文：否