Modulating Zinc Metal Reversibility by Confined Antifluctuator Film for Durable and Dendrite‐Free Zinc Ion Batteries

Abstract

Aqueous Zn ion batteries are promising systems due to their intrinsic safety, low cost, and non‐toxicity, and the Zn corrosion and dendrite growth will cause the poor reversibility of Zn anode. Herein, the porous Zn@C solid, hollow, and yolk–shell microsphere films are developed as Zn anode antifluctuator (ZAAF). The prepared yolk–shell microspheres (Zn@C yolk–shell microsphere [ZCYSM]) film with superior buffering can effectively restrict the deposition of Zn metal in its interior and inhibit the volume expansion during plating/stripping process, thus modulating the Zn2+ flux and enabling stable Zn cycling. As a proof of concept, the ZCYSM@Zn symmetric cells achieve the excellent cyclic stability over 4000 h and cumulative plated capacity of 4 Ah cm−2 at a high current density of 10 mA cm−2. Concomitantly, the suppressed corrosion reactions and dendrite‐free ZAAF significantly improve the durability of full cells (coupled to CaV6O16·3H2O). Additionally, durable pouch cell and electrochemical neuromorphic inorganic device (ENIDe) are integrated to simulate neural network, providing a strategy for extreme interconnectivity comparable to the human brain.

Double-sided engineering for space-confined reversible Zn anodes

“…Because of the plating/stripping electrochemistry, metallic Zn is “hostless” when used as the anode for Zn-based batteries, which can bring about large volume fluctuations and thus result in the unstable interface of the electrode. 54 Bare Zn shows a non-uniform stress distribution due to the uneven plating/stripping process (Fig. 4(f)).…”

ZnO–CoS heterostructure quantum dots for enhanced electrocatalytic nitrogen reduction to ammonia

“…2c). 38 High-resolution Zn 2p (2p 3/2 and 2p 1/2 ) peaks were observed at 1023.6 eV and 1044.7 eV (Fig. 2d).…”

Reshaping Zinc Plating/Stripping Behavior by Interfacial Water Bonding for High‐Utilization‐Rate Zinc Batteries

“…[1][2][3][4][5][6] However, the Zn anodes suffer a low utilization rate and rapid performance degradation stemming from dendrite growth and water-induced side reactions. [7][8][9][10][11][12][13] The widely used high dose of aqueous electrolytes with a large amount of free water infused in a glass fiber (GF) separator normally results in the continuous Zn dendrite growth and penetration, as well as the hydrogen evolution reaction (HER). [14][15][16][17] To solve these issues, controlling the activity of water molecules is crucial.…”