Resin‐Derived Ni₃S₂/Carbon Nanocomposite for Advanced Rechargeable Aqueous Zn‐Based Batteries

Abstract

The exploration of high‐energy and stable cathode materials is highly desirable and challenging for the development of advanced Zn‐based batteries. In this work, a facile pyrolysis method is reported to synthetize Ni3S2/carbon nanocomposite as high‐performance cathode by employing ion exchange resin as a precursor. Attributing to the abundant active sites and enhanced conductivity from well binding between Ni3S2 and carbon, a markedly high capacity of 234.3 mA h g−1 is obtained for this Ni3S2/carbon at a high current density of 6.9 A g−1. Moreover, a Zn‐based battery is demonstrated by using the Ni3S2/carbon as a cathode and Zn plate as an anode, which delivers a maximum power density of 58.6 kW kg−1, together with a peak energy density of 356 W h kg−1 and 93.7% capacity retention after 5000 charging–discharging cycles. This simple synthetic strategy to achieve robust Ni‐based composite electrodes may open up new opportunities to design other transition metal–based electrodes for energy storage applications.

Engineering Sulfur Vacancies of Ni3S2 Nanosheets as a Binder-Free Cathode for an Aqueous Rechargeable Ni-Zn Battery

“…Notably, the obtained relevant overall property of the r-Ni 3 S 2 //Zn battery is analogous or even surpasses significant proportion of previously reported aqueous Ni-Zn batteries, for instance, NiO//Zn (318 Wh kg −1 @1.47 kW kg −1 ), 54 Ni 2 P// Zn (318 Wh kg −1 @1.37 kW kg −1 ), 10 Ni 3 S 2 @PANI//Zn (386.7 Wh kg −1 @3.88 kW kg −1 ), 13 NiS 2 /RGO//Zn (357.7 Wh kg −1 @1.721 kW kg −1 ), 15 CC-CF@NiO//CC-CF@Zn (355.7 Wh kg −1 @17.9 kW kg −1 ), 61 NNA@CNH-1//NNA@ Zn (148.54 Wh kg −1 @1.725 kW kg −1 ), 56 NiCo 2 O 4 //Zn (301.3 Wh kg −1 @1.309 kW kg −1 ), 57 Co 3 O 4 //Zn (241 Wh kg −1 @1.506 kW kg −1 ), 62 V 2 O 5 //Zn (230 Wh kg −1 @0.767 kW kg −1 ), 63 and Ni 3 S 2 /C//Zn (356 Wh kg −1 @58.6 kW kg −1 ). 64 The long-term cycling durability is considered as the significant barrier hampering the practical application of the Ni-Zn battery. Here, the repeated continuous charge− discharge measurements of the Ni 3 S 2 //Zn batteries are established to explore the cycling stability with the current density maintained at 2.0 A g −1 , as described in Figure 8b.…”

Strategies of structural and defect engineering for high-performance rechargeable aqueous zinc-ion batteries

“…MCM4 also enhances the electronic conductivity of the MCM4@Mn 3 O 4 cathode and promotes electron transfer. In addition to these composites, other active cathode material coating carbon layers have been widely investigated, including Ni 3 S 2 /carbon, 119 122 MnO@N-C, 123 and Mn 3 O 4 @NC. 124 Other carbon materials, such as graphene, reduced graphene oxide (rGO), and carbon nanotubes (CNTs), have also been combined with cathodes to optimize their electrochemical performance.…”

Constructing Phase-Transitional NiSx@Nitrogen-Doped Carbon Cathode Material with High Rate Capability and Cycling Stability for Alkaline Zinc-Based Batteries

“…31,32 Thus, the NiS x and its carbon composite are promising candidates as a novel type of cathode material for ZNBs. In previous work, several singlephase NiS x such as NiS, 33 NiS 2 , 34 and Ni 3 S 2 35,36 have been designed and synthesized. However, the relationships between crystalline phases and electrochemical activities of these materials still remain unclear.…”