All-Solid-State Batteries with Thick Electrode Configurations

Kato, Yoshifumi; Shiotani, Shinya; Morita, Kenichi; Suzuki, Kota; Hirayama, Masaaki; Kanno, Ryoji

doi:10.1021/acs.jpclett.7b02880

Cited by 178 publications

(177 citation statements)

References 33 publications

(52 reference statements)

Supporting

Mentioning

173

Contrasting

Order By: Relevance

“…[1][2][3][4][5][6][7][8][9] In conventional electrode configurations (i.e., electrode materials coated on metallic current collectors), merely increasing the thickness of the electroactive coating causes two serious issues: 1) poor electrochemical performance due to sluggish ion and electron transport, and 2) weak mechanical stability leading to low packing density and detachment of electroactive material from [1][2][3][4][5][6][7][8][9] In conventional electrode configurations (i.e., electrode materials coated on metallic current collectors), merely increasing the thickness of the electroactive coating causes two serious issues: 1) poor electrochemical performance due to sluggish ion and electron transport, and 2) weak mechanical stability leading to low packing density and detachment of electroactive material from…”

Section: Thick Electrodesmentioning

confidence: 99%

“…[20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] However, conventional CNFbased electrodes are characterized by low energy density owing to inadequate conductivity arising from the poor compatibility between CNF and conductive agents. [1][2][3][4][5][6][7][8][9] In conventional electrode configurations (i.e., electrode materials coated on metallic current collectors), merely increasing the thickness of the electroactive coating causes two serious issues: 1) poor electrochemical performance due to sluggish ion and electron transport, and 2) weak mechanical stability leading to low packing density and detachment of electroactive material from This unique conductive CNF is achieved by a spontaneous electrostatic self-assembly technology as shown in Figure 1a.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Conductive Cellulose Nanofiber Enabled Thick Electrode for Compact and Flexible Energy Storage Devices

Kuang

Chen

Pastel

et al. 2018

Advanced Energy Materials

170

133

View full text Add to dashboard Cite

the current collector. Recently, progresses have been made in thick electrode architecture design by incorporating external magnetic fields and carbon templates for fast charge transfer kinetics, but the complicated producing processes and fragile electrode mechanical properties limit their ability for practical applications. [10][11][12][13][14][15] Fiber like carbon materials with large aspect ratio, such as carbon nanotubes (CNT), can significantly improve electrode mechanical strength and energy density due to its excellent electron conductivity and good compatibility to form continuous network with lower electrical percolation threshold. [16][17][18][19] Nonetheless, CNT is still constrained to complicated syntheses by expensive or low throughput methods which limits their application in bunch commercial products.Cellulose nanofiber (CNF) as an emerging biomass binder shows great potential in field of flexible and freestanding electrode fabrication due to its 1D nanostructure, excellent electrochemical stability, and robust mechanical property. [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] However, conventional CNFbased electrodes are characterized by low energy density owing to inadequate conductivity arising from the poor compatibility between CNF and conductive agents. Here, we report a conductive nanofiber network with decoupled electron and ion transfer pathways based on neutral carbon black (CB) nanoparticles and negatively charged CNF for high-loading thick electrode (up to 60 mg cm −2 ). This unique conductive CNF is achieved by a spontaneous electrostatic self-assembly technology as shown in Figure 1a. Microsize cellulose pulp was pretreated by 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) oxidization, which selectively oxidized the C6-hydroxyl group to a carboxyl group, leading to a strong negatively charged surface of the cellulose fibers. Negatively charged CNF was then obtained by disintegrating the microsized cellulose fiber down to the nanoscale by a probe sonication process for 1 h (Figures S1-S5, Supporting Information). Such negatively charged CNF can firmly absorb neutral CB nanoparticles by electrostatic attraction, forming a conformal conductive nanofiber. The conductive CNF can further assemble into an interconnected 3D network and tightly wrap the active electrode materials such as lithium iron phosphate (LFP) during the freeze-drying process (Figure 1b).Thick electrodes are appealing for high energy density devices but succumb to sluggish charge transfer kinetics and poor mechanical stability. Nanomaterials with large aspect ratio, such as carbon nanotubes, can help improve the charge transfer and strength of thick electrodes but represent a costly solution which hinders their utility outside of "lab scale production." Here, a conductive nanofiber network with decoupled electron and ion transfer pathways by the conformal electrostatic assembly of neutral carbon black particles on negatively charged cellulose nanofibers is reported. After integrating with ...

show abstract

Section: Thick Electrodesmentioning

confidence: 99%

mentioning

confidence: 99%

Conductive Cellulose Nanofiber Enabled Thick Electrode for Compact and Flexible Energy Storage Devices

Kuang

Chen

Pastel

et al. 2018

Advanced Energy Materials

170

133

View full text Add to dashboard Cite

show abstract

“…Meanwhile, polymer-, oxide-, and sulfide-based ionic conductors are being heavily investigated as the solid electrolyte (SE) separator. [19,20] Unfortunately, thiophosphates also have a rather narrow electrochemical stability window, i.e., the onset of oxidative decomposition begins even before 3 V versus Li + /Li due to S(0)/S(−2) redox reactions, while reductive decomposition is theoretically expected at potentials of about 1.7 V versus Li + /Li due to P(+5)/P(−3) redox reactions. [2,3,18] Currently, only thiophosphates allow for the preparation of thick cathode composites with sufficient rate capability.…”

mentioning

confidence: 99%

On the Functionality of Coatings for Cathode Active Materials in Thiophosphate‐Based All‐Solid‐State Batteries

Culver

Koerver

Zeier

et al. 2019

Advanced Energy Materials

240

309

View full text Add to dashboard Cite

achievable by SSBs. Meanwhile, polymer-, oxide-, and sulfide-based ionic conductors are being heavily investigated as the solid electrolyte (SE) separator. [9][10][11][12][13][14][15] Nevertheless, recent estimates [16,17] show that only batteries possessing sulfide-based SEs will be leading contenders for room-temperature applications.The sulfides, which are better denoted as thiophosphates, provide the highest lithium-ion conductivity, a relatively low E modulus, and can be processed at low temperatures. [2,3,18] Currently, only thiophosphates allow for the preparation of thick cathode composites with sufficient rate capability. [19,20] Unfortunately, thiophosphates also have a rather narrow electrochemical stability window, i.e., the onset of oxidative decomposition begins even before 3 V versus Li + /Li due to S(0)/S(−2) redox reactions, while reductive decomposition is theoretically expected at potentials of about 1.7 V versus Li + /Li due to P(+5)/P(−3) redox reactions. [21,22] Importantly, the perfect SE does not actually exist. The perfect SE would combine the ionic transport properties of thiophosphates, the mechanical properties of polymers, and the oxidation stability of oxides. Therefore, in order to exploit the superionic transport properties of thiophosphates, the implementation of protective coatings to overcome the intrinsic electrochemical instabilities is most certainly a necessity. The thermodynamic prerequisites for coatings (Figure 1) have already been treated in a number of theoretical papers, [18,21,[23][24][25] which provide the initial design guidelines.Beyond the thermodynamic considerations, it is well known that within SSBs, thiophosphate SEs are oxidized and decomposed in direct contact with cathode active materials (CAMs), in particular at high potentials during charging. [2,[26][27][28] Several years ago, Takada summarized the early work on SSBs and described the need for coatings against the formation of space charge layers at the interface between high-voltage cathodes and thiophosphate SEs. [29] Haruyama et al. concluded from density functional theory calculations that space charge layers between LiCoO 2 (LCO) and thiophosphate-based SEs are responsible for high impedances and that the addition of a buffer layer reduces such effects. [30] However, experimental evidence for such claims has not yet been reported. While these considerations are certainly valuable, from a current perspective, effects arising from the space charge layer are likely overstated and the role of oxidative degradation of the SE is understated. [31] Though the The last decade has seen considerable advancements in the development of solid electrolytes for solid-state battery applications, with particular attention being paid to sulfide superionic conductors. Importantly, the intrinsic electrochemical instability of these high-performance separators highlights the notion that further progress in the field of solid-state batteries is contingent on the optimization of component material interfaces in order to se...

show abstract

“…With proper microstructure and materials choice, such a composite cathode may provide the opportunity to increase cathode thicknesses significantly beyond 300 μm, values for which the rate capability of a liquid electrolyte lithium‐ion battery would suffer severely . Recently, a bulk solid‐state battery with composite cathodes and anodes up to 600 μm thick was demonstrated . Irrespective of the thickness of the composite electrodes, achieving a high‐quality interface with a ceramic electrolyte requires innovative ceramic processing .…”

Section: Introductionmentioning

confidence: 99%

Digital Printing of Solid‐State Lithium‐Ion Batteries

et al. 2019

View full text Add to dashboard Cite

Solid-state lithium-ion batteries promise to deliver the next generation of energy storage with necessary improvements in safety, energy density, and durability. However, their broad commercial success requires the development of scalable manufacturing processes to address fabrication challenges associated with composite electrodes, electrode/solid electrolyte interfaces, and thin solid electrolyte layers. In parallel with the need for innovation in solid-state battery fabrication, there is a rapid progress in the field of 3D printing of functional materials. Hence, there is now the opportunity to consider how additive manufacturing informs fabrication processes for solid-state lithium-ion batteries. Herein, the fabrication requirements of solid-state lithium-ion batteries are described and recent examples of digitally fabricated solid-state lithium-ion batteries, components, and materials are highlighted. A critical review of initial efforts toward 3D printing of solid-state lithium-ion batteries provides the prospective to identify future challenges and prospects.

show abstract

All-Solid-State Batteries with Thick Electrode Configurations

Cited by 178 publications

References 33 publications

Conductive Cellulose Nanofiber Enabled Thick Electrode for Compact and Flexible Energy Storage Devices

Conductive Cellulose Nanofiber Enabled Thick Electrode for Compact and Flexible Energy Storage Devices

On the Functionality of Coatings for Cathode Active Materials in Thiophosphate‐Based All‐Solid‐State Batteries

Digital Printing of Solid‐State Lithium‐Ion Batteries

Contact Info

Product

Resources

About