Ionically conducting inorganic binders: a paradigm shift in electrochemical energy storage

Trivedi, Shivam; Pamidi, Venkat; Fichtner, Maximilian; Reddy, M. Anji

doi:10.1039/d2gc01389d

Cited by 14 publications

(50 citation statements)

References 38 publications

(67 reference statements)

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“…In general, with a strong binding affinity towards electrode components, the moderate ionic conductivity of binders is essential for shuttling ions between the electrolyte and active materials, which is induced by binder wetting in liquid electrolytes [ 24 ]. The non-sulfonated hydrophobic PVdF shows poor wetting behavior in aqueous electrolytes, exhibiting low ionic conductivity of 7.48 × 10 −5 S cm −2 (Fig.…”

Section: Resultsmentioning

confidence: 99%

Enhancing Hydrophilicity of Thick Electrodes for High Energy Density Aqueous Batteries

Lee

Bak

et al. 2023

Nano-Micro Lett.

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Thick electrodes can substantially enhance the overall energy density of batteries. However, insufficient wettability of aqueous electrolytes toward electrodes with conventional hydrophobic binders severely limits utilization of active materials with increasing the thickness of electrodes for aqueous batteries, resulting in battery performance deterioration with a reduced capacity. Here, we demonstrate that controlling the hydrophilicity of the thicker electrodes is critical to enhancing the overall energy density of batteries. Hydrophilic binders are synthesized via a simple sulfonation process of conventional polyvinylidene fluoride binders, considering physicochemical properties such as mechanical properties and adhesion. The introduction of abundant sulfonate groups of binders (i) allows fast and sufficient electrolyte wetting, and (ii) improves ionic conduction in thick electrodes, enabling a significant increase in reversible capacities under various current densities. Further, the sulfonated binder effectively inhibits the dissolution of cathode materials in reactive aqueous electrolytes. Overall, our findings significantly enhance the energy density and contribute to the development of practical zinc-ion batteries.

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Section: Resultsmentioning

confidence: 99%

Enhancing Hydrophilicity of Thick Electrodes for High Energy Density Aqueous Batteries

Lee

Bak

et al. 2023

Nano-Micro Lett.

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“…The symmetric Na/NGS/Na cell showed very low impedance of only 80 Ω (Figure b), whereas the EIS spectra of the Na 0.7 Mn 0.9 Mg 0.1 O 2 (80 wt %) + Super P (10 wt %) + Na 2 SiO 3 (10 wt %)/NGS/Na cell showed extremely high impedance of over 90000 Ω Figure S9(b). This could be due to the poor ionic conductivity of the binder . We expect to improve the performance of SSSBs by using high-conducting binders.…”

Section: Solid-state Batteries With Ngsmentioning

confidence: 99%

Reinvestigation of Na₅GdSi₄O₁₂: A Potentially Better Solid Electrolyte than Sodium β Alumina for Solid-State Sodium Batteries

Michalak,

Behara,

2024

ACS Appl. Mater. Interfaces

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Developing high-performing solid electrolytes that could replace flammable organic liquid electrolytes is vital in designing safer solid-state batteries. Among the sodium-ion (Na + ) conducting solid electrolytes, Na-β″-alumina (BASE) is highly regarded for its employment in solid-state battery applications due to its high ionic conductivity and electrochemical stability. BASE has long been employed in commercial Na−NiCl 2 and Na−S batteries. However, the synthesis of highly conductive BASE is energy-intensive, involving elevated temperatures for sintering and the incorporation of stabilizing additives. Additionally, BASE is highly sensitive to humidity, which limits its applications. Hence, there is an intense search to identify suitable high-performing solid electrolytes that could replace BASE. In this context, we reinvestigated Na 5 GdSi 4 O 12 (NGS) and demonstrated that phase pure NGS could be synthesized by a simple solid-state reaction. Beyond a high ionic conductivity of 1.9 × 10 −3 S cm −1 at 30 °C (1.5 × 10 −3 S cm −1 for BASE), NGS exhibited high chemical as well as electrochemical stability, lower interfacial resistance, lower deposition and stripping potential, and higher short-circuiting current, designating NGS as a better solid electrolyte than BASE.

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“…In addition, sodium metasilicate (SMS: Na 2 SiO 3 , Figure 2c) and lithium polysilicate (LPS: Li 2 Si 5 O 11 ) were also explored. [ 43 ]…”

Section: Inorganic Aqueous Bindersmentioning

confidence: 99%

“…Further improvement was realized by introducing IAB for Na 0.7 Mn 0.7 Mg 0.1 O 2 (NMO) cathodes and graphite anodes for SIBs and LIBs respectively. [ 43 ] IABs possess a very high thermal stability up to 1000 °C with weight loss of <2% in sodium phosphate binders and <4% in the case of SMS owing to the loss of surface groups ( Figure 3 a). NMO‐IAB electrodes exhibited significantly lower heat release in charged (de‐sodiated) state as compared to PVdF‐based electrode (Figure 3b).…”

Section: Inorganic Aqueous Bindersmentioning

confidence: 99%

Water‐Soluble Inorganic Binders for Lithium‐Ion and Sodium‐Ion Batteries

Trivedi,

Pamidi,

Bautista

et al. 2023

Advanced Energy Materials

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Inorganic materials form an emerging class of water‐soluble binders for battery applications. Their favourable physicochemical properties, such as intrinsic ionic conductivity, high thermal stability (>1000 °C), and compatibility to coat a diverse range of electrode materials make them useful binders for lithium‐ion and sodium‐ion batteries. Li and Na containing phosphates and silicates are attractive choices as multifunctional inorganic aqueous binders (IABs). This review discusses these binders' structural, thermal, and ionic properties, followed by exploiting their ionically conducting nature for all‐solid‐state batteries. Subsequently, the application of these compounds as binders and surface coating agents for different anodes and cathodes in lithium‐ion and sodium‐ion batteries is discussed. Eventually, a first evaluation of their environmental impacts and economic aspects is presented as well.

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Ionically conducting inorganic binders: a paradigm shift in electrochemical energy storage

Abstract: Among the key components in batteries, binders play a vital role by interconnecting active materials and conductive additives and facilitating the coating of electrode materials on the desired substrates thus...

Cited by 14 publications

References 38 publications

Enhancing Hydrophilicity of Thick Electrodes for High Energy Density Aqueous Batteries

Enhancing Hydrophilicity of Thick Electrodes for High Energy Density Aqueous Batteries

Reinvestigation of Na₅GdSi₄O₁₂: A Potentially Better Solid Electrolyte than Sodium β Alumina for Solid-State Sodium Batteries

Water‐Soluble Inorganic Binders for Lithium‐Ion and Sodium‐Ion Batteries

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Ionically conducting inorganic binders: a paradigm shift in electrochemical energy storage

Abstract: Among the key components in batteries, binders play a vital role by interconnecting active materials and conductive additives and facilitating the coating of electrode materials on the desired substrates thus...

Cited by 14 publications

References 38 publications

Enhancing Hydrophilicity of Thick Electrodes for High Energy Density Aqueous Batteries

Enhancing Hydrophilicity of Thick Electrodes for High Energy Density Aqueous Batteries

Reinvestigation of Na5GdSi4O12: A Potentially Better Solid Electrolyte than Sodium β Alumina for Solid-State Sodium Batteries

Water‐Soluble Inorganic Binders for Lithium‐Ion and Sodium‐Ion Batteries

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Reinvestigation of Na₅GdSi₄O₁₂: A Potentially Better Solid Electrolyte than Sodium β Alumina for Solid-State Sodium Batteries