A bio-inspired electrolyte with <i>in situ</i> repair of Zn surface cracks and regulation of Zn ion solvation chemistry to enable long life and deep-cycling zinc metal batteries

Hu, Nan; Lv, Wenxin; Tang, Huan; Qin, Hongyu; Zhou, Yuhang; Li, Yang; Huang, Dan; Wu, Zhenrui; Liu, Jian; Chen, Zhengjun; Xu, Jing; He, Huibing

doi:10.1039/d3ta02804f

Cited by 20 publications

(5 citation statements)

References 56 publications

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“…The highly active water in hydrated structures is prone to decomposing during the charging and discharging process, leading to side reactions including H 2 releasing, Zn corrosion, and the growth of Zn dendrites. 35–39 To address these issues, an organohydrogel electrolyte with a bisolvent of water and 1,3-dioxolane (BIS-D 0.6 , volume ratio of DOL : H 2 O = 6 : 4) as the dispersion medium is developed. The preferential solvation of DOL with Zn 2+ and strong DOL–H 2 O interaction both suppressed the HER and lowered the freezing point of water.…”

Section: Resultsmentioning

confidence: 99%

Organohydrogel electrolytes with solvated structure regulation for highly reversible low-temperature zinc metal batteries

Zhang,

Yang,

Fang

et al. 2024

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 99%

Organohydrogel electrolytes with solvated structure regulation for highly reversible low-temperature zinc metal batteries

Zhang,

Yang,

Fang

et al. 2024

J. Mater. Chem. A

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“…For TN‐containing electrolyte, a sharp ZnO (TN) peak appears at around 2 Å in the distance (Figure S31, Supporting Information), which is the same as that of pure ZS electrolyte (Figure S30b, Supporting Information), indicating the insertion of the double‐charged TN into the primary solvent shell (PSS) of Zn 2+ . Besides, the coordination number of H 2 O molecules drops from 5.98 to 5.12, suggesting that TN tends to replace the inner water and penetrate the PSS of Zn 2+ to coordinate with Zn 2+[ 50 ] (Figure 4h).…”

Section: Resultsmentioning

confidence: 99%

A Double‐Charged Organic Molecule Additive to Customize Electric Double Layer for Super‐Stable and Deep‐Rechargeable Zn Metal Pouch Batteries

Hu,

Lv,

Chen

et al. 2023

Adv Funct Materials

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The electrochemical performance of aqueous zinc metal batteries (AZMBs) is highly dependent on the electric double layer (EDL) properties at Zn electrode/electrolyte interface. Herein, a novel reconfigured EDL is constructed via a double‐charged theanine (TN) additive for super‐stable and deep‐rechargeable AZMBs. Experiments and theoretical computations unravel that the positively charged TN not only serves as preferential anchor to form a water‐poor Helmholtz plane onto the Zn anode, but also its anionic end could coordinate with Zn2+ to tailor the solvation structure in the diffusion layer and further reconstruct the inner H‐bonds networks, thus effectively guiding uniform Zn deposition and suppressing the water‐induced side reactions. Consequently, the Zn//Zn cells acquire outstanding cycling stabilities of nearly 800 h at a high depth of discharge of 80%. Moreover, the Zn//VOX full cells deliver substantial capacity retention (94.12% after 1400 cycles at 2 A g−1) under practical conditions. Importantly, the designed 2.7 Ah Zn//VOX pouch cell harvests a recorded energy density of 42.3 Wh Kgcell−1 and 79.5 Wh Lcell–1, with a remarkable capacity retention of 85.93% after 220 cycles at 50 mA g−1. This innovative design concept to reshape the EDL chemistry would inject fresh vitality into developing advanced AZMBs and beyond.

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“…To regulate nucleation process, various electrolyte additives have been extensively employed due to their cost-effectiveness and practicality. [125] Liu et al proposed ethylene glycol monomethyl ether (EGME) as an electrolyte additive. The regulation mechanism was revealed by AFM as EGME could adsorb on the anode to regulate interfacial deposition kinetics due to its inherent zincophilicity and finally created a flatter anode surface.…”

Section: Advanced Probe Techniquesmentioning

confidence: 99%

Advanced Characterization Techniques on Mechanism Understanding and Effect Evaluation in Zinc Anode Protection

Zhu,

Li,

Rao

et al. 2024

Advanced Energy Materials

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The growing environmental pollution issues and continuous energy dilemma call for high‐performance energy storage systems (ESSs). While the inevitable safety concerns appear and restrict the application of lithium‐ion batteries in large‐scale ESSs. Contrastively, zinc ion batteries (ZIBs) attract increasing attention due to the inherent advantages of high safety, low cost, and environmental friendliness. However, the poor stability and reversibility of Zn anodes bring severe difficulty for its practical application. Considerable efforts are devoted in the anode modification, such as electrolyte adjustment, interfacial engineering, and anode structure design, but there is still a fuzzy field concerning the reaction process, regulation mechanism, and modified effect. Reviewing the history, the development of various electrodes greatly depends on the breakthrough in advanced characterization technologies, while the summarizations of technological advances in the Zn anode are still deficient. Hence, this review concentrates on the recent progress in various characterization techniques and related strategies of anode protection. The information is especially highlighted that each technique can offer the crucial or auxiliary role they play in proving specific issues. Furthermore, the opinions on current limitations and future directions of common characterization techniques are also discussed in detail, aiming to give a comprehensive perspective in designing advanced zinc anodes.

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A bio-inspired electrolyte with in situ repair of Zn surface cracks and regulation of Zn ion solvation chemistry to enable long life and deep-cycling zinc metal batteries

Abstract: Rechargeable aqueous Zn-ion batteries (ZIBs) have drawn incredible attentions recently due to their high energy density, low cost and intrinsic safety. However, the water attack that consistently corrode the Zn...

Cited by 20 publications

References 56 publications

Organohydrogel electrolytes with solvated structure regulation for highly reversible low-temperature zinc metal batteries

Organohydrogel electrolytes with solvated structure regulation for highly reversible low-temperature zinc metal batteries

A Double‐Charged Organic Molecule Additive to Customize Electric Double Layer for Super‐Stable and Deep‐Rechargeable Zn Metal Pouch Batteries

Advanced Characterization Techniques on Mechanism Understanding and Effect Evaluation in Zinc Anode Protection

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