Infiltration of Solution-Processable Solid Electrolytes into Conventional Li-Ion-Battery Electrodes for All-Solid-State Li-Ion Batteries

Kim, Dong Hyeon; Oh, Dae Yang; Park, Kern Ho; Choi, Young Eun; Nam, Young Jin; Lee, Yong Sang; Lee, Sang Min; Jung, Yoon Seok

doi:10.1021/acs.nanolett.7b00330

Cited by 287 publications

(264 citation statements)

References 51 publications

(115 reference statements)

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“…In addition, as the isolated large LCO particles are electronically disconnected (Figure S8, Supporting Information), there are many parts where the SE particles are solely gathered together with the amorphous carbon, which may finally lead to severe decreasing the ionic conductivity of the cathode electrode. This rationale was further assisted by the results of the pressurized cells showing decent rate performances comparable to those of previous cells that were tested under similar conditions (Figure S15b,c, Supporting Information) …”

Section: Resultsmentioning

confidence: 59%

Graphitic Hollow Nanocarbon as a Promising Conducting Agent for Solid‐State Lithium Batteries

Park

et al. 2019

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LIBs) are desirable to significantly increase to fulfill the growing demand for long distance per each charge. For this reason, next generation batteries such as Li-S, Li-O 2 , and Li-metal with exceptional energies have been attracted much attention as potential candidates due to their outstanding performances. [1][2][3][4][5] However, unfortunately, as a substantial amount of electrochemical energy should be stored in a confined volume, these systems are thermodynamically unstable, which could be a risk for safety incidents.In an attempt to overcome these drawbacks, the all-solid-state batteries (ASSBs) with all-solidified components are now considered as a promising next-generation technology beyond state-of-the-art LIBs. [6] The fascinating features of the ASSBs lie in the opportunity of enhancing energy density and surmounting the intrinsic shortcomings of conventional liquid-based batteries, such as electrolyte leakage, flammability, narrow voltage window, and low lithium ion transport number. In other words, the ASSBs are promising systems due to nonvolatile, nonexplosive, and stability up to ≈6.0 V versus Li/Li + . [6][7][8][9][10] In particular, if lithium metal can be employed as an anode material and interfacial stability can be improved, [11,12] it can be possible to achieve high energy and power density. These extraordinary properties of the ASSBs have extensively stimulated scientific and industry communities to the ASSB's research.In order to achieve superior electrochemical performances of the ASSBs, not only improving interfacial stability during the cycling, but balancing both ionic and electronic conductivities of composites is of crucial importance. For instance, while the electronic pathways appear to be more important for the high energy density ASSBs operating at relatively low current density, the sufficient ion transport is a more critical factor at high rate operations for the high power density ASSBs, [13,14] although the cell performances are relatively related to diverse factors such as the operating pressure/temperature, particle size, and composition in the electrode. In terms of enhancement of the ionic conductivity, extensive efforts for developing solid electrolyte (SE) with high ionic conductivity have been conducted for past few decades. Among diverse candidates, much attention has been focused on the sulfide-based SE including Li 10 GeP 2 S 12 (LGPS), [7,15] β-Li 3 PS 4 , [16] Li 7 P 3 S 11 , [17] Li 2 S-P 2 S 5 , [18] and argyrodite All-solid-state batteries (ASSBs) have lately received enormous attention for electric vehicle applications because of their exceptional stability by engaging all-solidified cell components. However, there are many formidable hurdles such as low ionic conductivity, interface instability, and difficulty in the manufacturing process, for its practical use. Recently, carbon, one of the representative conducting agents, turns out to largely participate in side reactions with the solid electrolyte, which finally leads to the formation of insulating sid...

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Section: Resultsmentioning

confidence: 59%

Graphitic Hollow Nanocarbon as a Promising Conducting Agent for Solid‐State Lithium Batteries

Park

et al. 2019

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“…On the other hand, ASSBs exploit non-flammable solid electrolytes, making them much more tolerant to reactions with such explosive natures, thus are regarded as the promising safe alternative to the current lithium-ion batteries 4–6 . However, employing solid-state electrolyte in the ASSBs accompanies several important technical issues that need to be addressed such as the necessity of finding solid-state fast ionic conductors whose ionic conductivity should be comparable to that of the liquid electrolyte and the careful interface control of the solid-solid contacts among the various components in the battery 7–9 .…”

Section: Introductionmentioning

confidence: 99%

Investigation on the interface between Li10GeP2S12 electrolyte and carbon conductive agents in all-solid-state lithium battery

Yoon

Kim

Seong

et al. 2018

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All-solid-state batteries are considered as one of the attractive alternatives to conventional lithium-ion batteries, due to their intrinsic safe properties benefiting from the use of non-flammable solid electrolytes in ASSBs. However, one of the issues in employing the solid-state electrolyte is the sluggish ion transport kinetics arising from the chemical and physical instability of the interfaces among solid components including electrode material, electrolyte and additive agents. In this work, we investigate the stability of the interface between carbon conductive agents and Li10GeP2S12 in a composite cathode and its effect on the electrochemical performance of ASSBs. It is found that the inclusion of various carbon conductive agents in composite cathode leads to inferior kinetic performance of the cathode despite expectedly enhanced electrical conductivity of the composite. We observe that the poor kinetic performance is attributed to a large interfacial impedance which is gradually developed upon the inclusions of the various carbon conductive agents regardless of their physical differences. The analysis through X-ray Photoelectron Spectroscopy suggests that the carbon additives in the composite cathode stimulate the electrochemical decomposition of LGPS electrolyte degrading its surface during cycling, indicating the large interfacial resistance stems from the undesirable decomposition of the electrolyte at the interface.

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“…[17] Li 6 PS 5 Cl is consequently ap romising candidate for all-solidstate Li-ion batteries. [18][19][20][21][22] Thediscovery of new and advanced solid electrolytes has been hindered by incomplete understanding of the fundamental descriptors that dictate ionic mobility.R egarding Li 6 PS 5 X( X= Cl, Br,I )s tudies of the role of anion polarizability [23] and halogen disorder are prominent. Early on, it was demonstrated that the very low conductivity of Li 6 PS 5 I ( % 4 10 À4 mS cm À1 ), is due to the ordering of the larger I À ion on the 4 a site,c ompared to the disorder of Cl À /Br À ions over both the 4 a and 4 c crystallographic sites which invokes high conductivity.…”

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confidence: 99%

Boosting Solid‐State Diffusivity and Conductivity in Lithium Superionic Argyrodites by Halide Substitution

et al. 2019

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Developing high-performance all-solid-state batteries is contingent on finding solid electrolyte materials with high ionic conductivity and ductility.Here we report new halide-rich solid solution phases in the argyrodite Li 6 PS 5 Cl family, Li 6Àx PS 5Àx Cl 1+x ,a nd combine electrochemical impedance spectroscopy, neutron diffraction, and 7 Li NMR MAS and PFG spectroscopytoshow that increasing the Cl À /S 2À ratio has as ystematic, and remarkable impact on Li-ion diffusivity in the lattice.T he phase at the limit of the solid solution regime, Li 5.5 PS 4.5 Cl 1.5 ,e xhibits ac old-pressed conductivity of 9.4 AE 0.1 mS cm À1 at 298 K( and 12.0 AE 0.2 mS cm À1 on sintering)almost four-fold greater than Li 6 PS 5 Cl under identical processing conditions and comparable to metastable superionic Li 7 P 3 S 11 .W eakened interactions between the mobile Li-ions and surrounding framework anions incurred by substitution of divalent S 2À for monovalent Cl À play amajor role in enhancing Li + -ion diffusivity,a long with increased site disorder and ahigher lithium vacancy population. Figure 5. a) 7 Li MAS NMR for Li 6Àx PS 5Àx Cl 1+x (x = 0, 0.25, 0.375, 0.5) b) correlation of the activation energies from both techniques with the 7 Li isotropic chemical shift and the Haven ratio for all values of x under study.

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Infiltration of Solution-Processable Solid Electrolytes into Conventional Li-Ion-Battery Electrodes for All-Solid-State Li-Ion Batteries

Cited by 287 publications

References 51 publications

Graphitic Hollow Nanocarbon as a Promising Conducting Agent for Solid‐State Lithium Batteries

Graphitic Hollow Nanocarbon as a Promising Conducting Agent for Solid‐State Lithium Batteries

Investigation on the interface between Li10GeP2S12 electrolyte and carbon conductive agents in all-solid-state lithium battery

Boosting Solid‐State Diffusivity and Conductivity in Lithium Superionic Argyrodites by Halide Substitution

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