3D Nanowire Arrayed Cu Current Collector toward Homogeneous Alloying Anode Deposition for Enhanced Sodium Storage

Abstract

Alloying electrodes are regarded as promising anodes for lithium/sodium storage thanks to their multielectron reaction capacity, moderate voltage plateau, and high electrical conductivity. However, huge volume change upon cycling, especially for sodium storage, usually causes the loss of electrical connection between active components and their delaminations from traditional current collectors, thus leading to rapid capacity decay. Herein, a unique 3D current collector is assembled from 1D nanowire arrays anchored on 3D porous Cu foams for constructing core‐shelled Cu@Sb nanowires as advanced sodium‐ion battery (SIB) anodes. The so‐formed hierarchical 3D anode with interconnected 3D micrometer sized pores and abundant voids between nanowires not only effectively accommodates the structural strains during repeated cycling but also ensures the structural integrity and contributes to a uniform ion/electron scattered distribution throughout the whole surface. When employed as anodes for SIBs, the obtained electrode shows a high capacity of 605.3 mAh g−1 at 330 mA g−1, and demonstrates a high capacity retention of 84.8% even at a high current density of 3300 mA g−1. The 3D nanowire arrayed Cu current collector in this work can offer a promising strategy for designing and building advanced alloy anodes for lithium/sodium storage.

Facile and Controllable Synthesis of Co2V2O7 Microplatelets Anchored on Graphene Layers toward Superior Li-Ion Battery Anodes

“…Exploration of sustainable and clean energy is of top priority since the fuel crisis in the 1970s. − As one of the most successful renewable technologies, lithium-ion batteries (LIBs) have become indispensable power in mobile electronics and new energy vehicles (NEVs) because of their superior energy density, long cycling life, no memory effect, and environmental benignity. − However, the graphite anode of commercial LIBs has a limited theoretical specific capacity (372 mA h g –1 ) and a potential lithium dendrite issue, especially during fast charging or overcharging conditions, which cannot satisfy the requirements of large capacity storage systems and NEVs. − In the past several years, mixed transition metal oxides have received extensive attention in light of their diverse applications in many fields such as photocatalysis/electrocatalysis and rechargeable batteries. − Particularly, cobalt vanadates, including Co 3 V 2 O 8 , Co 2 V 2 O 7 , and CoV 2 O 6 , and so forth, have been widely studied, with desirable electrochemical performances in LIBs. For instance, Wu et al.…”

3D Porous Self-Standing Sb Foam Anode with a Conformal Indium Layer for Enhanced Sodium Storage

“…32 In our previous work, we have demonstrated successfully the use of a 3D porous Cu current collector assembled from core-shelled Cu@ Sb nanowire arrays, which displays a reversible capacity of 561.1 mA h g −1 after 200 cycles at 330 mA g −1 as an anode for SIBs. 33 Another effective method is compositing Sb with carbon materials or designing a Sb@C core−shell structure to improve the electron-/ion-transfer kinetics and enhance the electrode/electrolyte interphase stability. 36−44 Wang et al have developed a Sb@(N,S−C) composite with Sb nanorods encapsulated in highly conductive N&S codoped carbon frameworks.…”

Recent Developments of Antimony-Based Anodes for Sodium- and Potassium-Ion Batteries

“…In addition, as shown in Fig. 6b, Fan et al [60] constructed a core-shelled Cu@Sb nanowire array anchored on 3D porous Cu foam through anodization and high-temperature reduction. The hierarchical 3D structure with interconnected pores and voids between nanowires can effectively relieve the internal stress and promote the consistent transport of electrons and ions along the growth direction of the nanowire during charging and discharging.…”