Enable commercial Zinc powders for dendrite-free Zinc anode with improved utilization rate by pristine graphene hybridization

Du, Wencheng; Huang, Song; Zhang, Yufei; Ye, Minghui; Li, Cheng Chao

doi:10.1016/j.ensm.2021.12.007

Cited by 116 publications

(106 citation statements)

References 41 publications

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“…Undoubtedly, the CPE strategy shows a remarkable improvement and surpasses the performance of Zn//Cu cells in the latest reported works (Table S2, Supporting Information). [26][27][28][29][30][31][32][33][34][35][36][37][38][39] To demonstrate the feasibility and efficiency of the CPE in full cell, NVO nanofibers are used as the cathodes to pair with Zn metal anodes. [40] The Zn//NVO full cell demonstrates nearly no capacity decay over 5000 cycles at a high rate of 5 A g −1 as shown in Figure 5f, featuring decent capacity ≈100 mAh g −1 and CE of >99%.…”

Section: Efficacy Of the Designed Cpementioning

confidence: 99%

Diminishing Interfacial Turbulence by Colloid‐Polymer Electrolyte to Stabilize Zinc Ion Flux for Deep‐Cycling Zn Metal Batteries

et al. 2022

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volumetric capacity of 5855 mAh cm −3 ) of metallic Zn. [1] However, nonuniform Zn deposition aggravates formation of dendrites and leads to a low Coulombic efficiency (CE), resulting in battery performance deterioration. It is believed that regulated Zn 2+ distribution is beneficial to the uniform Zn plating. [1,2] Many works in the field of Zn anode realize uniform Zn 2+ distribution and improve Zn electrochemistry by constructing efficient Zn 2+ transport path. [1][2][3] However, we find that at deep cycling (high current densities and capacities), the interfacial turbulence is a severe problem that cannot be ignored to destroy the stability of Zn 2+ transport path. In details, the Zn 2+ ions flux distribution is affected by two factors: construction and stabilization of Zn 2+ transport path. Homogeneous Zn 2+ channels are helpful to realize uniform ion flux distribution; while Zn 2+ transport path would be destructed due to inevitable severe interfacial turbulence caused by fluidity of electrolyte and undesired H 2 evolution reaction (HER), which would lead to the disturbance of ion flux and uneven Zn deposition. In addition, the HER is usually accompanied by metal corrosion. [3] This not only consumes water in the electrolyte, but also the generated H 2 would result in swelling of the cell and even cell rupture. Meanwhile, the consumption of H + in water results in the accumulation of residual OH − ions, driving the corrosion reaction to form inactive Zn 4 SO 4 (OH) 6 •xH 2 O byproducts. [4,5] Moreover, the operation of ZMBs with high capacities is limited owing to the incomplete Zn discharging process because accumulated Zn leads to increased polarization of the battery; High current density can also cause an inhomogeneous electric field, incomplete metal stripping, and excessive polarization especially current and concentration polarization. [6,7] These issues can cause more serious interfacial instability and disturbance for deep-cycling batteries with high areal capacities and high current densities, significantly undermining the performance of ZMBs and plaguing their scale-up implementation. Aqueous deeply rechargeable Zn metal electrodes can only be achieved when the interfacial turbulence is rectified. Considering that free water molecules in electrolytes induce H 2 evolution and interfacial corrosion, highly concentrated The fluidity of aqueous electrolytes and undesired H 2 evolution reaction (HER) can cause severe interfacial turbulence in aqueous Zn metal batteries (ZMBs) at deep cycling with high capacities and current densities, which would further perturb ion flux and aggravate Zn dendrite growth. In this study, a colloid-polymer electrolyte (CPE) with special colloidal phase and suppressed HER is designed to diminish interfacial turbulence and boost deep Zn electrochemistry. Density functional theory calculations confirm that the quantitative migratory barriers of Zn 2+ along the transport pathway in CPE demonstrate much smaller fluctuations compared with normal aqueous electrolyte, indicating...

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Section: Efficacy Of the Designed Cpementioning

confidence: 99%

Diminishing Interfacial Turbulence by Colloid‐Polymer Electrolyte to Stabilize Zinc Ion Flux for Deep‐Cycling Zn Metal Batteries

et al. 2022

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“…Although the performance of RZMBs has been greatly improved, the instability [ 4 ] of the Zn anodes is still the bottleneck restricting their commercialization [ 5 , 6 ]. One of the important and unresolved issues is that previous reports generally use thick Zn foils (> 100 μm) as the anode [ 7 ], which leads to high negative to positive capacity ratios (N/P > 50) [ 8 ]. The large excess of Zn can compensate for the rapid loss of Zn during cycling to achieve excellent cell performance [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

Iodine Promoted Ultralow Zn Nucleation Overpotential and Zn-Rich Cathode for Low-Cost, Fast-Production and High-Energy Density Anode-Free Zn-Iodine Batteries

Zhang

Wang

et al. 2022

Nano-Micro Lett.

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The anode-free design is a promising strategy to increase the energy density of aqueous Zn metal batteries (AZMBs). However, the scarcity of Zn-rich cathodes and the rapid loss of limited Zn greatly hinder their commercial applications. To address these issues, a novel anode-free Zn-iodine battery (AFZIB) was designed via a simple, low-cost and scalable approach. Iodine plays bifunctional roles in improving the AFZIB overall performance: enabling high-performance Zn-rich cathode and modulating Zn deposition behavior. On the cathode side, the ZnI2 serves as Zn-rich cathode material. The graphene/polyvinyl pyrrolidone heterostructure was employed as an efficient host for ZnI2 to enhance electron conductivity and suppress the shuttle effect of iodine species. On the anode side, trace I3− additive in the electrolyte creates surface reconstruction on the commercial Cu foil. The in situ formed zincophilic Cu nanocluster allows ultralow-overpotential and uniform Zn deposition and superior reversibility (average coulombic efficiency > 99.91% over 7,000 cycles). Based on such a configuration, AFZIB exhibits significantly increased energy density (162 Wh kg−1) and durable cycle stability (63.8% capacity retention after 200 cycles) under practical application conditions. Considering the low cost and simple preparation methods of the electrode materials, this work paves the way for the practical application of AZMBs.

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“…As seen, the cell can deliver capacities of 415.6, 379.7, 350.0, 316.3, 280.3 and 184.9 mAh g −1 at 0.1, 0.2, 0.5, 1.0, 2.0 and 5.0 A g −1 , respectively, and the capacity can recover to 270.0 mAh g −1 when the current decreases to 2.0 A g −1 . It should be noted that the capacity decay was faster than that of a half-cell and the capacities at higher current densities were slightly lower than those of cells using zinc foils as anodes, which may result from vanadium dissolution and the severe side reaction of zinc powders in aqueous electrolytes and can be further improved by structural modification and electrolyte optimization [ 54 , 55 , 56 , 57 ]. The cell was also cycled at 1.0 A g −1 for 100 cycles ( Figure 6 c).…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Electrochemical Performance of the Orthorhombic V2O5·nH2O Nanorods as Cathodes for Aqueous Zinc Batteries

et al. 2022

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Aqueous zinc-ion batteries offer the greatest promise as an alternative technology for low-cost and high-safety energy storage. However, the development of high-performance cathode materials and their compatibility with aqueous electrolytes are major obstacles to their practical applications. Herein, we report the synthesis of orthorhombic V2O5·nH2O nanorods as cathodes for aqueous zinc batteries. As a result, the electrode delivers a reversible capacity as high as 320 mAh g−1 at 1.0 A g−1 and long-term cycling stability in a wide window of 0.2 to 1.8 V using a mild ZnSO4 aqueous electrolyte. The superior performance can be attributed to the improved stability of materials, inhibited electrolyte decomposition and facilitated charge transfer kinetics of such materials for aqueous zinc storage. Furthermore, a full cell using microsized Zn powder as an anode within capacity-balancing design exhibits high capacity and stable cycling performance, proving the feasibility of these materials for practical application.

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Enable commercial Zinc powders for dendrite-free Zinc anode with improved utilization rate by pristine graphene hybridization

Cited by 116 publications

References 41 publications

Diminishing Interfacial Turbulence by Colloid‐Polymer Electrolyte to Stabilize Zinc Ion Flux for Deep‐Cycling Zn Metal Batteries

Diminishing Interfacial Turbulence by Colloid‐Polymer Electrolyte to Stabilize Zinc Ion Flux for Deep‐Cycling Zn Metal Batteries

Iodine Promoted Ultralow Zn Nucleation Overpotential and Zn-Rich Cathode for Low-Cost, Fast-Production and High-Energy Density Anode-Free Zn-Iodine Batteries

Synthesis and Electrochemical Performance of the Orthorhombic V2O5·nH2O Nanorods as Cathodes for Aqueous Zinc Batteries

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