Ni (II) Coordination Supramolecular Grids for Aqueous Nickel‐Zinc Battery Cathodes

Abstract

Aqueous rechargeable nickel‐zinc batteries (NZBs) have the advantages of economical cost and reliable safety. Despite reports of success in achieving high‐utilization and stable Zn anodes, the practical application of NZBs has been plagued by the restrictive capacity density and degradation of the Ni‐based cathode. Herein, it is reported that nickel‐ligand coordination grids (NCGs) with a high theoretical capacity of 128.12 mAh g−1 offer a fast faradic reaction while maintaining good reversibility due to the abundant open metal sites and flexible network structures. In situ and ex situ characterizations demonstrate that the graphene nanosheet (GN) modification of NCGs supramolecular substantially boosts surface charge and reducing the work function of supramolecular compounds. A Ni//Zn battery using such a graphene organic‐inorganic material (G‐NCGs) achieve a high gravimetric capacity of 113.8 mAh g−1 at 0.5 A g−1 with 50% of its initial capacitance retained after 2000 cycles and an exceptional rate capacity of 43.3 mAh g−1 even at the current density of 5.0 A g−1.

Facile synthesis of mesoporous NixCo9−xS8 hollow spheres for high-performance supercapacitors and aqueous Ni/Co–Zn batteries

“…6c). The maximum charge capacitance approach to the similar aqueous Ni–Zn batteries, such as G-NCGs//Zn battery (113.8 mA h g −1 , 0.5 A g −1 ), 51 Ni 3 S 2 /Ni//Zn battery (148 mA h g −1 , 0.2 A g −1 ), 52 Zn//NiCo 2 O 4 (112 mA h g −1 , 1 A g −1 ), 53 Zn//NiO–CNTs battery (155 mA h g −1 , 1 A g −1 ), 54 F-doped Ni–Co hydroxide (FNCH) and oxide constructed FNCH/Ni//Zn battery (88 mA h g −1 , 1 A g −1 ) and FNCO/Ni//Zn battery (159 mA h g −1 , 1 A g −1 ), 55 ZnCo 2 O 4− x //Zn (148.3 mA h g −1 , 0.05 A g −1 ), 56 Zn//ZnAl 0.67 Co 1.33 O 4 (134 mA h g −1 , 16 mA g −1 ), 57 NiCo 2 O 4 -1//Zn (122.5 mA h g −1 , 1 A g −1 ), 58 and NiO/C–Zn (159 mA h g −1 , 1 A g −1 ). 59 Furthermore, the cyclic stability of the Ni-Co 9 S 8 -0.6//Zn battery was tested at 4 A g −1 for 3000 cycles, the capacity retention kept at 69% (Fig.…”

MOF-derived NiCo2S4 and carbon hybrid hollow spheres compactly concatenated by electrospun carbon nanofibers as self-standing electrodes for aqueous alkaline Zn batteries

“…During the cycling process, the coulombic efficiency of NiCo 2 S 4 /HCS@CFs//Zn is nearly 100%. Impressively, the NiCo 2 S 4 /HCS@CFs//Zn battery delivers a high capacity retention of 89.2% aer 1000 cycles, which also exceeds the value of other aqueous AZBs, such as G-NCGs//Zn (90% aer This journal is © The Royal Society of Chemistry 2022 650 cycles), 57 Al-CoNiDH-5%//Zn (78.1% aer 1000 cycles), 53 NiCo 2 O 4 //Zn (63.2% aer 1000 cycles), 54 NiSe//Zn-KFC//Zn (63.4% aer 1300 cycles), 55 CH@NC-LDH@NT//Zn (71.0% aer 800 cycles), 56 and others listed in Table S1 †. Besides, the NiCo 2 S 4 /HCS@CF cathode aer the cycling test was examined by SEM, which can maintain the morphology and structure, as shown in Fig.…”

Anchoring I3– via Charge-Transfer Interaction by a Coordination Supramolecular Network Cathode for a High-Performance Aqueous Dual-Ion Battery

“…We can see from Figure e that Zn-PymSH possesses both high capacity and high voltage compared with the reported aqueous Zn–I DIBs, or aqueous Zn-RCBs with CSNs cathode. Figure f shows that Zn-PymSH combines high capacity and high cycling stability compared with the reported aqueous Zn–I DIBs, or DIBs and aqueous Zn-RCBs with CSNs cathode. ,,,,,− More detailed data are listed in Tables S1–S4.…”