Long‐Life Sulfide All‐Solid‐State Battery Enabled by Substrate‐Modulated Dry‐Process Binder

Li, Yongxing; Wu, Yujing; Ma, Tenghuan; Wang, Zhixuan; Gao, Qifa; Xu, Jiming; Chen, Liquan; Li, Hong; Wu, Fan

doi:10.1002/aenm.202201732

Cited by 52 publications

(32 citation statements)

References 54 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The calendering process can effectively decrease the porosity and densify the microstructure in the composite electrodes, thus improving the electrochemical performance. The successful electrode fabrication by a dry process mainly relies on the surface interaction of the different electrode components and a robust 3D network created by binders. , However, the surface energies and the resulting particle adhesion of silicon, SE and carbon particles are not well studied. The large shear forces during the dry process may damage the SE particles, leading to decreased ionic conductivity, which has yet not been explored.…”

Section: Sheet-type Silicon Composite Anodesmentioning

confidence: 99%

Silicon as Emerging Anode in Solid-State Batteries

Huo

Janek

2022

ACS Energy Lett.

View full text Add to dashboard Cite

Silicon is one of the most promising anode materials due to its very high specific capacity (3590 mAh g −1 ), and recently its use in solid-state batteries (SSBs) has been proposed. Although SSBs utilizing silicon anodes show broad and attractive application prospects, current results are still in an infant state in terms of electrochemical performance, analytical characterization and mechanistic understanding. This paper aims to summarize current achievements and remaining challenges for the use of silicon anodes in SSBs and to provide a perspective for SSB cells with high energy density. Three types of cells with their specific type of silicon anode (i.e., thin-film cells, powder-pressed pellet-type cells, and sheet-type pouch cells) are reviewed, from their electro-chemo-mechanical behavior to microstructure optimization. Future directions for research of silicon anodes in SSBs are outlined, such as quantifying the partial ionic/ electronic conductivity of silicon anodes, clarifying their interfacial stability, and investigating their chemo-mechanical stability.

show abstract

Section: Sheet-type Silicon Composite Anodesmentioning

confidence: 99%

Silicon as Emerging Anode in Solid-State Batteries

Huo

Janek

2022

ACS Energy Lett.

View full text Add to dashboard Cite

show abstract

“…[37] Recently, the dry process has been employed to fabricate SSE films that showed retained ionic conductivity and a thin layer comparable to that of the pristine SSEs and commercial polymeric separators, respectively. [37][38][39][40][41][42] Despite the feasibility of dry processing SSE films, there remain limitations in the understanding of specific process design principles. i) While the reported work showed the presence of fibrils connecting SSE particles, the exact morphology and distribution of the fibrils have not been clearly probed and understood with different fabrication parameters.…”

Section: Introductionmentioning

confidence: 99%

Physio‐Electrochemically Durable Dry‐Processed Solid‐State Electrolyte Films for All‐Solid‐State Batteries

Lee

Jang

Lee

et al. 2023

Adv Funct Materials

View full text Add to dashboard Cite

The dry process is a promising fabrication method for all‐solid‐state batteries (ASSBs) to eliminate energy‐intense drying and solvent recovery steps and to prevent degradation of solid‐state electrolytes (SSEs) in the wet process. While previous studies have utilized the dry process to enable thin SSE films, systematic studies on their fabrication, physical and electrochemical properties, and electrochemical performance are unprecedented. Here, different fabrication parameters are studied to understand polytetrafluoroethylene (PTFE) binder fibrillation and its impact on the physio‐electrochemical properties of SSE films, as well as the cycling stability of ASSBs resulting from such SSEs. A counter‐balancing relation between the physio‐electrochemical properties and cycling stability is observed, which is due to the propagating behavior of PTFE reduction (both chemically and electrochemically) through the fibrillation network, resulting in cell failure from current leakage and ion blockage. By controlling PTFE fibrillation, a bilayer configuration of SSE film to enable physio‐electrochemically durable SSE film for both good cycling stability and charge storage capability of ASSBs is demonstrated.

show abstract

“…Therefore, additional measures, either mechanical rubbing or thermal treatment, have been executed to accelerate such a de-fluorination reaction for rapidly constructing NaF-rich interface. [29,41] Interestingly, when the PTFE-covered Na metal was soaked into diglymebased electrolyte and then pressed by a slight squeeze as illustrated in Figure 1, the color of PTFE membrane quickly turned black (Figure S2c, Supporting Information). Such a resultant Na metal (noted as PTFE-Na) could be used as the anode in the coin-type cell assembly.…”

Section: Resultsmentioning

confidence: 99%

Rapidly Constructing Sodium Fluoride‐Rich Interface by Pressure and Diglyme‐Induced Defluorination Reaction for Stable Sodium Metal Anode

Zhang

Yang

Wang

et al. 2023

Small

View full text Add to dashboard Cite

theories regarding stabilizing metal anode, the enhancement of mechanical flexibility and ionic conductivity for solid electrolyte interphase (SEI) formed on metal anode has become a paradigm, because better SEI film is believed to have a passivated role in protecting metal surface from the corrosion attack of organic electrolyte. [15][16][17][18][19] Specifically for the design of the SEI ingredients, the high content of sodium fluoride (NaF) is frequently emphasized, [20][21][22][23] since the NaF is chemically inert for organic electrolyte but ionically conductive to reinforce the Na diffusion within the SEI film, in turn offsetting the adverse effect in impedance polarization. [24][25][26] Accordingly, the various strategies, including electrolyte additive and artificial coating, to obtain NaF-rich SEI film are often performed, technologically realizing a significant improvement in specific energy and cycling stability. [27][28][29][30] This is particularly true for the hybrid NaF/carbon-based SEI film generated by leveraging the reaction between highly reductive Na metal and various F-contain materials. [31][32][33] Nevertheless, these above-mentioned methods are rarely put to use in daily battery assembly regarding Na metal anode, because some electrolyte additives are likely incompatible with the cathode materials, causing their functions to fail. [34] Meanwhile, the artificial coating essentially needs for a pretreatment process involving with a high-temperature and complexity operation. [35][36][37][38] Therefore, the methods that can be surely applied to stabilize Na metal anode should be universal, immediate, forceful but within a mild condition.In this work, we look to develop a universal and facile method that is readily applied in daily battery assembly regarding Na metal anode, to the maximum extent eliminating the uncertainties arising from the utilization of bare Na metal anode. We observed that the ether-based solvents, including diglyme, tetraglyme, and 1,3-dioxolane, could accelerate the reaction between Na metal and polytetrafluoroethylene (PTFE) film. Inspired by this phenomenon, an integrated design based on PTFE film and ether solvents is proposed that initially prevents the exposure of pristine Na metal anode to the water. Subsequently, once the electrolyte is dropped into coin-type cells followed by a slight squeeze, the Na metal surface readily forms a hybrid NaF/carbon layer to enhance interfacial stability. [39,40] Sodium (Na) metal is able to directly use as a battery anode but have a highly reductive ability of unavoidably occurring side reactions with organic electrolytes, resulting in interfacial instability as a primary factor in performance decay. Therefore, building stable Na metal anode is of utmost significance for both identifying the electrochemical performance of laboratory half-cells employed for quantifying samples and securing the success of room-temperature Na metal batteries. In this work, we propose an NaF-rich interface rapidly prepared by pressure and diglyme-induc...

show abstract

Long‐Life Sulfide All‐Solid‐State Battery Enabled by Substrate‐Modulated Dry‐Process Binder

Cited by 52 publications

References 54 publications

Silicon as Emerging Anode in Solid-State Batteries

Silicon as Emerging Anode in Solid-State Batteries

Physio‐Electrochemically Durable Dry‐Processed Solid‐State Electrolyte Films for All‐Solid‐State Batteries

Rapidly Constructing Sodium Fluoride‐Rich Interface by Pressure and Diglyme‐Induced Defluorination Reaction for Stable Sodium Metal Anode

Contact Info

Product

Resources

About