Current Progress of Anode‐Free Rechargeable Sodium Metal Batteries: Origin, Challenges, Strategies, and Perspectives

Hu, Zewei; Liu, Liyang; Wang, Xin; Zheng, Qingqing; Han, Chao; Li, Weijie

doi:10.1002/adfm.202313823

Cited by 22 publications

(1 citation statement)

References 130 publications

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“…30,33 In this paper, we evaluate the role of strain applied to a NiTi current collector on the energetics of Na metal plating and stripping. Strain effects in batteries have been established based on a number of mechanisms including temperature inhomogeneity during operation, 34 the formation of uncontrolled SEI or dead Li/Na for metal batteries, 35,36 and the asymmetric nature of n/p volume change in a Li or Na metal battery, 37,38 among others. The use of NiTi enables the direct comparison of Na electroplating processes at different current collector strain states based on the superelastic and shape memory behaviors of NiTi.…”

Section: Introductionmentioning

confidence: 99%

Role of Interface Strain and Chemo-Mechanical Effects during Electroplating in Sodium Metal Battery Anodes

Ojha,

Alaei,

Jiao

et al. 2024

ACS Appl. Mater. Interfaces

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In this study, we demonstrate that elastic strain applied to a current collector can influence the overall thermodynamic and kinetic picture of sodium metal electrodeposition and hence the performance of a sodium metal battery. To controllably study the role of strain in electrochemical performance, we utilize NiTi foil as a stable current collector, nucleation interface, and superelastic material. Our findings demonstrate that a locked-in elastic tensile strain near 8% results in 40 mV lower onset potential for sodium electrodeposition, 19% decrease in charge transfer resistance, and 20% lower cumulative sodium loss, among other effects. These performance improvements are correlated primarily to the control of the irreversible behavior in the first few minutes of electroplating. Given the prevalence of strain buildup in commercial battery cell configurations, our work highlights that strained current collector interfaces can result in significant long-term chemo-mechanical performance outcomes broadly relevant to sodium and other metal battery design considerations.

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Section: Introductionmentioning

confidence: 99%

Role of Interface Strain and Chemo-Mechanical Effects during Electroplating in Sodium Metal Battery Anodes

Ojha,

Alaei,

Jiao

et al. 2024

ACS Appl. Mater. Interfaces

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Anode‐Free Alkali Metal Batteries: From Laboratory to Practicability

Xu,

Huang,

Sun

et al. 2024

Adv Funct Materials

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Anode‐free alkali metal batteries (AFAMBs) are regarded as the most promising candidates for next‐generation high‐energy systems owing to their high safety, high energy density, and low cost. However, the restricted alkali supply at the cathode, severe dendrite growth, and unstable electrode‐electrolyte interface result in low Coulombic efficiency and severely short cycle life. The optimization strategies are mainly based on laboratory‐level coin cells, but their effectiveness in practical‐level batteries is rarely discussed. This review presents a comprehensive overview of the recent developments and challenges of AFAMBs from the laboratory toward their practicability. First, the advances, major challenges, and optimization strategies are systematically summarized. More significantly, given the vast differences in battery structures and operating conditions, the gap between laboratory‐level and practical‐level batteries is particularly emphasized in this review. In addition, the failure mechanisms of practical‐level AFAMBs have been outlined and the key parameters affecting their performance are identified. Finally, insightful perspectives on practical AFAMBs are presented, aiming to provide helpful guidance for subsequent basic research to promote large‐scale commercial applications of AFAMBs.

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Sodiophilic Substrate Induces NaF‐Rich Solid Electrolyte Interface for Dendrite‐Free Sodium Metal Anode

Liu,

Miao,

Sun

et al. 2024

Advanced Materials

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Three‐dimensional (3D) substrate with abundant sodiophilic active sites holds promise for implementing dendrite‐free sodium metal anodes and high‐performance sodium batteries. However, the heightened electrode/electrolyte side reactions stemming from high specific surface area still hinder electrode structure stability and cycling reversibility, particularly under high current densities. Herein, we regulated the solid electrolyte interface (SEI) component and restrained detrimental side reactions through the uniform loading of Na‐Sn alloy onto a porous 3D nanofiber framework (NaSn‐PCNF). The strong interaction between Na‐Sn alloy and PF6− anions facilitates the dissociation of sodium salts and releases more free sodium ions for effective charge transfer. Simultaneously, the modulations of the interfacial electrolyte solvation structure and the construction of a high NaF content SEI layer stabilize the electrode/electrolyte interface. NaSn‐PCNF symmetrical battery demonstrates stable cycling for over 600 hours with an ultralow overpotential of 24.5 mV under harsh condition of 10 mA cm−2 and 10 mAh cm−2. Moreover, the full cells and pouch cells exhibit accelerated reaction kinetics and splendid capacity retention, providing valuable insights into the development of advanced Na substrates for high‐energy sodium metal batteries.This article is protected by copyright. All rights reserved

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Current Progress of Anode‐Free Rechargeable Sodium Metal Batteries: Origin, Challenges, Strategies, and Perspectives

Cited by 22 publications

References 130 publications

Role of Interface Strain and Chemo-Mechanical Effects during Electroplating in Sodium Metal Battery Anodes

Role of Interface Strain and Chemo-Mechanical Effects during Electroplating in Sodium Metal Battery Anodes

Anode‐Free Alkali Metal Batteries: From Laboratory to Practicability

Sodiophilic Substrate Induces NaF‐Rich Solid Electrolyte Interface for Dendrite‐Free Sodium Metal Anode

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