A Superlattice-Stabilized Layered CuS Anode for High-Performance Aqueous Zinc-Ion Batteries

Abstract

Rechargeable aqueous zinc ion batteries (AZIBs) are attracting extensive attention owing to environmental friendliness and high safety. However, its practical applications are limited to the poor Coulombic efficiency and stability of a Zn anode. Herein, we demonstrate a periodically stacked CuS-CTAB superlattice, as a competitive conversion-type anode for AZIBs with greatly improved specific capacity, rate performance, and stability. The CuS layers react with Zn2+ to endow high capacity, while CTAB layers serve to stabilize the structure and facilitate Zn2+ diffusion kinetics. Accordingly, CuS-CTAB shows superior rate performance (225.3 mA h g–1 at 0.1 A g–1 with 144.4 mA h g–1 at 10 A g–1) and a respectable cyclability of 87.6% capacity retention over 3400 cycles at 10 A g–1. In view of the outstanding electrochemical properties, full batteries constructed with a CuS-CTAB anode and cathode (Zn x FeCo­(CN)6 and Zn x MnO2) are evaluated in coin cells, which demonstrate impressive full-battery performance.

A Volume Self-Regulation MoS2 Superstructure Cathode for Stable and High Mass-Loaded Zn-Ion Storage

“…This might be attributed to the fact that CTAB intercalated into MoS 2 and the weak Coulomb interaction between layers therefrom. 25 The SXRD patterns indicate the enlarged interlayer spacing of MoS 2 −CTAB and the successful formation of an organic−inorganic superlattice structure. In addition, different amounts of CTAB could affect the formation process of the structure, and the XRD peak of the superlattice could be significantly observed above 9.6 × 10 −4 mol CTAB.…”

Synergistic Engineering of Sulfur Vacancies and Heterointerfaces in Copper Sulfide Anodes for Aqueous Zn‐Ion Batteries with Fast Diffusion Kinetics and an Ultralong Lifespan

“…reported that the construction of an organic–inorganic superlattice structure can stabilize the reversible transition process of CuS, thereby achieving enhanced cycle stability (≈ 87.6% capacity retention over 3400 cycles) and reliable capacity. [ 31 ] These progressional results indicate that advanced design strategies such as defect engineering or heterogeneous interfaces would be beneficial to ion dynamics and structural stability, respectively, thereby modulating the Zn 2+ storage mechanism of Cu‐TMC anodes as well as improving one or more aspects of electrochemical performance. Therefore, it is foreseeable that the combination of multiple optimization strategies will synergistically improve the anode performance in AZIBs, which will also reveal the similarity and divergence of intrinsic electrochemical behaviors and performances for Zn 2+ storage in Cu‐based chalcogenides and that is worth exploring.…”

Practical conversion-type titanium telluride anodes for high-capacity long-lifespan rechargeable aqueous zinc batteries

“…3f, the proposed TiTe 2 electrode has a high capacity and long cycling life among the state-of-the-art low-voltage electrodes for RAZBs. 23,25–29,38–40…”

“…3f, the proposed TiTe 2 electrode has a high capacity and long cycling life among the state-of-the-art low-voltage electrodes for RAZBs. 23,[25][26][27][28][29][38][39][40] The galvanostatic intermittent titration technique (GITT) and electrochemical impedance spectroscopy (EIS) were carried out to probe the kinetic process. As shown in Fig.…”

“…By pairing Mo 6 S 8 anodes with the zincpolyiodide cathode, the full cells display stable long-term stability over 350 cycles. 23 To date, some metal-free anodes, e.g., Zn x Mo 2.5+y VO 9+z , 24 Na 0.14 TiS 2 , 25 CuS, 26 Cu 2Àx Se, 27 1,4,5,8-naphthalene diimide, 28 and perylene-3,4,9,10-tetracarboxylic diimide/ rGO 29 have been exploited in Zn batteries, delivering appropriate operating voltage (vs. Zn 2+ /Zn) below 1.0 V. However, there is still a particular gap from commercialization in terms of the energy density and cycling life.…”