Metallic Particles‐Induced Surface Reconstruction Enabling Highly Durable Zinc Metal Anode

Abstract

Aqueous zinc batteries usher in a renaissance due to their intrinsic security and cost effectiveness, bespeaking vast application foreground for large‐scale energy storage system. However, uncontrolled dendrite growth along with hydrogen evolution severely restricts its reversibility and stability for practical application. Herein, the surface of Zn metal is reconstructed with metallic particles (In, Sn, In0.2Sn0.8) to diminish surface defects and regulate Zn deposition behavior. The alloyed In–Sn greatly activates the Zn surface for lower Zn adsorption energy barrier to expedite plating kinetics and confine Zn aggregation. Dense and uniform deposition of Zn on the reconstructed surface significantly prevents the Zn substrate from dendrites growth for catastrophic damage. Meanwhile, alloy layer embodies high hydrogen evolution overpotential, ensuring high plating and stripping efficiency for Zn anode. Consequently, In0.2Sn0.8 reconstructed surface realizes long‐term lifespan up to 1800 h with low polarization (12 mV) at the condition of 1 mA cm−2 and 1 mAh cm−2. When paired with sodium vanadate (NVO) cathode, the full cell steady operates for a high‐capacity retention of 94.0% after 5000 cycles at 5 A g−1. This study provides new insights into the surface‐defects dependent Zn deposition process and offers a guide for constructing stable surface for dendrite‐free Zn growth.

Controllable synthesis of an atomic Sn-anchoring carbon host for excellent long-cycle-life zinc metal batteries

“…2c, Sn@HMCS exhibits stable CE with an average value of 99.4% over 215 cycles at 1 mA cm −2 for 1 mA h cm −2 , while the CE of HMCS decays sharply even within 100 cycles, indicating the strategy of doping single-atom Sn can improve the Zn-ion plating/stripping reversibility of the electrode. 33 As shown in Fig. S7a and b,† with increasing current density, Sn@HMCS still exhibits more stable CE than HMCS.…”

Effect of electrolyte optimization on nitrogen-doped MXene (Ti3C2Tx) coupled with Cu–BTC MOF for a supercapattery and the hydrogen evolution reaction

“…The presence of comparable helical structures at varying current densities can be attributed to the inherent stability and reversibility of the energy storage mechanism. 79,80 The GCD results evaluate the device storage efficiency concerning energy density E d (W h kg −1 ), and power density P d (W kg −1 ) (eqn (7) and (8)). 81 …”

Designing high-performance polyaniline @MoS2@AC hybrid electrode for electrochemical–based Next-generation battery-supercapacitor hybrid energy storage device and hydrogen evolution reaction

“…The performance of the cobalt-based electrode is strongly based on the morphology which is a critical parameter. However, the metallic oxide/sulfide-based electrode materials still have several limitations, including poor power densities and unstable cycling stabilities, caused by variations in their electrochemical volumetric processes [12,13].…”