Studying the Conversion Mechanism to Broaden Cathode Options in Aqueous Zinc‐Ion Batteries

Hao, Junnan; Yuan, Libei; Johannessen, Bernt; Zhu, Yilong; Jiao, Yan; Ye, Chao; Xie, Fangxi; Qiao, Shi‐Zhang

doi:10.1002/ange.202111398

Cited by 40 publications

(20 citation statements)

References 66 publications

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“…In recent decades there has emerged significant research interest in aqueous zinc-ion batteries (AZIBs) as a practically promising alternative to lithium-ion batteries. [1,2] The reasons include, low relative cost, good environmental "friendliness" and nonflammability. [3][4][5][6][7] Zinc metal is widely used as an anode in AZIBs because it exhibits a high theoretical capacity of 820 mAh g −1 and a low electrochemical potential of −0.762 V versus SHE which results in an attractive energy density in practical application.…”

Section: Introductionmentioning

confidence: 99%

Understanding H₂ Evolution Electrochemistry to Minimize Solvated Water Impact on Zinc‐Anode Performance

et al. 2022

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H2 evolution is the reason for poor reversibility and limited cycle stability with Zn‐metal anodes, and impedes practical application in aqueous zinc‐ion batteries (AZIBs). Here, using a combined gas chromatography experiment and computation, it is demonstrated that H2 evolution primarily originates from solvated water, rather than free water without interaction with Zn2+. Using linear sweep voltammetry (LSV) in salt electrolytes, H2 evolution is evidenced to occur at a more negative potential than zinc reduction because of the high overpotential against H2 evolution on Zn metal. The hypothesis is tested and, using a glycine additive to reduce solvated water, it is confirmed that H2 evolution and “parasitic” side reactions are suppressed on the Zn anode. This electrolyte additive is evidenced to suppress H2 evolution, reduce corrosion, and give a uniform Zn deposition in Zn|Zn and Zn|Cu cells. It is demonstrated that Zn|PANI (highly conductive polyaniline) full cells exhibit boosted electrochemical performance in 1 M ZnSO4–3 M glycine electrolyte. It is concluded that this new understanding of electrochemistry of H2 evolution can be used for design of relatively low‐cost and safe AZIBs for practical large‐scale energy storage.

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Section: Introductionmentioning

confidence: 99%

Understanding H₂ Evolution Electrochemistry to Minimize Solvated Water Impact on Zinc‐Anode Performance

et al. 2022

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“…[1][2][3][4][5][6] However, the sluggish intercalation kinetics associated with the large size of hydrated Zn-ions results in the lack of suitable cathode materials. [7][8][9][10] Currently, manganese-based oxides materials, [11,12] vanadium-based oxides materials, [13,14] and prussian blue analogues [15,16] have been widely studied. Their poor electrical conductivity attracts the introduction of transition metal dichalcogenides (TMDs) because TMDs typically show superior electrical conductivity to transition metal oxides (TMOs).…”

Section: Doi: 101002/smll202204534mentioning

confidence: 99%

Heterostructures Stimulate Electric‐Field to Facilitate Optimal Zn²⁺ Intercalation in MoS₂ Cathode

Yao

Xiao

et al. 2022

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The electric‐field effect is an important factor to enhance the charge diffusion and transfer kinetics of interfacial electrode materials. Herein, by designing a heterojunction, the influence of the electric‐field effect on the kinetics of the MoS2 as cathode materials for aqueous Zn‐ion batteries (AZIBs) is deeply investigated. The hybrid heterojunction is developed by hydrothermal growth of MoS2 nanosheets on robust titanium‐based transition metal compound ([titanium nitride, TiN] and [titanium oxide, TiO2]) nanowires, denoted TNC@MoS2 and TOC@MoS2 NWS, respectively. Benefiting from the heterostructure architecture and electric‐field effect, the TNC@MoS2 electrodes exhibit an impressive rate performance of 200 mAh g−1 at 50 mA g−1 and cycling stability over 3000 cycles. Theoretical studies reveal that the hybrid architecture exhibits a large‐scale electric‐field effect at the interface between TiN and MoS2, enhances the adsorption energy of Zn‐ions, and increases their charge transfer, which leads to accelerated diffusion kinetics. In addition, the electric‐field effect can also be effectively applied to TiO2 and MoS2, confirming that the concept of heterostructures stimulating electric‐field can provide a relevant understanding for the architecture of other cathode materials for AZIBs and beyond.

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“…[36][37][38][39] However, the problems of dendrite and side reaction, such as corrosion, passivation, and hydrogen evolution, in zinc anode are urgent to be solved, which seriously hinder the practical application. [40,41] Therefore, alleviating the growth of zinc dendrites and the occurrence of side reactions is of great significance for improving the performance of ZIBs.…”

Section: Introductionmentioning

confidence: 99%

A Review on 3D Zinc Anodes for Zinc Ion Batteries

et al. 2022

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Zinc ion batteries (ZIBs) have been gradually developed in recent years due to their abundant resources, low cost, and environmental friendliness. Therefore, ZIBs have received a great deal of attention from researchers, which are considered as the next generation of portable energy storage systems. However, poor overall performance of ZIBs restricts their development, which is attributed to zinc dendrites and a series of side reactions. Constructing 3D zinc anodes has proven to be an effective way to significantly improve their electrochemical performance. In this review, the challenges of zinc anodes in ZIBs, including zinc dendrites, hydrogen evolution and corrosion, as well as passivation, are comprehensively summarized and the energy storage mechanisms of the zinc anodes and 3D zinc anodes are discussed. 3D zinc anodes with different structures including fiberous, porous, ridge‐like structures, plated zinc anodes on different substrates and other 3D zinc anodes, are subsequently discussed in detail. Finally, emerging opportunities and perspectives on the material design of 3D zinc anodes are highlighted and challenges that need to be solved in future practical applications are discussed, hopefully illuminating the way forward for the development of ZIBs.

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Studying the Conversion Mechanism to Broaden Cathode Options in Aqueous Zinc‐Ion Batteries

Cited by 40 publications

References 66 publications

Understanding H₂ Evolution Electrochemistry to Minimize Solvated Water Impact on Zinc‐Anode Performance

Understanding H₂ Evolution Electrochemistry to Minimize Solvated Water Impact on Zinc‐Anode Performance

Heterostructures Stimulate Electric‐Field to Facilitate Optimal Zn²⁺ Intercalation in MoS₂ Cathode

A Review on 3D Zinc Anodes for Zinc Ion Batteries

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Studying the Conversion Mechanism to Broaden Cathode Options in Aqueous Zinc‐Ion Batteries

Cited by 40 publications

References 66 publications

Understanding H2 Evolution Electrochemistry to Minimize Solvated Water Impact on Zinc‐Anode Performance

Understanding H2 Evolution Electrochemistry to Minimize Solvated Water Impact on Zinc‐Anode Performance

Heterostructures Stimulate Electric‐Field to Facilitate Optimal Zn2+ Intercalation in MoS2 Cathode

A Review on 3D Zinc Anodes for Zinc Ion Batteries

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Product

Resources

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Understanding H₂ Evolution Electrochemistry to Minimize Solvated Water Impact on Zinc‐Anode Performance

Understanding H₂ Evolution Electrochemistry to Minimize Solvated Water Impact on Zinc‐Anode Performance

Heterostructures Stimulate Electric‐Field to Facilitate Optimal Zn²⁺ Intercalation in MoS₂ Cathode