Mechanical and Thermal Failure Induced by Contact between a Li1.5Al0.5Ge1.5(PO4)3 Solid Electrolyte and Li Metal in an All Solid-State Li Cell

Chung, Hyun‐Jong; Kang, Byoungwoo

doi:10.1021/acs.chemmater.7b02301

Cited by 223 publications

(218 citation statements)

References 23 publications

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“…As shown in Figure S8a (Supporting Information), in accordance with previous reports, [11,35,36] a large total resistance was observed due to high interfacial resistances between Li metal and CS LAGP-LiTFSI. As shown in Figure S8a (Supporting Information), in accordance with previous reports, [11,35,36] a large total resistance was observed due to high interfacial resistances between Li metal and CS LAGP-LiTFSI.…”

Section: Resultssupporting

confidence: 90%

“…As shown in Figure S8a (Supporting Information), in accordance with previous reports, [11,35,36] a large total resistance was observed due to high interfacial resistances between Li metal and CS LAGP-LiTFSI. [36] To reduce interfacial resistances, we added a small amount of liquid electrolyte (4 m lithium bis(fluorosulfonyl) imide salt (LiFSI) in 1,2-dimethoxyethane (DME) (≈5.0 µL cm −2 )) at the electrode contacts, as has been demonstrated previously to promote stable Li plating/stripping with high Coulombic efficiency (CE). [36] To reduce interfacial resistances, we added a small amount of liquid electrolyte (4 m lithium bis(fluorosulfonyl) imide salt (LiFSI) in 1,2-dimethoxyethane (DME) (≈5.0 µL cm −2 )) at the electrode contacts, as has been demonstrated previously to promote stable Li plating/stripping with high Coulombic efficiency (CE).…”

Section: Resultssupporting

confidence: 90%

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Ceramic–Salt Composite Electrolytes from Cold Sintering

Lee

Lyon

Seo

et al. 2019

Adv Funct Materials

102

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The development of solid electrolytes with the combination of high ionic conductivity, electrochemical stability, and resistance to Li dendrites continues to be a challenge. A promising approach is to create inorganic-organic composites, where multiple components provide the needed properties, but the high sintering temperature of materials such as ceramics precludes close integration or co-sintering. Here, new ceramic-salt composite electrolytes that are cold sintered at 130 °C are demonstrated. As a model system, composites of Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP) or Li 1+x+y Al x Ti 2−x Si y P 3−y O 12 (LATP) with bis(trifluoromethanesulfonyl)imide (LiTFSI) salts are cold sintered. The resulting LAGP-LiTFSI and LATP-LiTFSI composites exhibit high relative densities of about 90% and ionic conductivities in excess of 10 −4 S cm −1 at 20 °C, which are comparable with the values obtained from LAGP and LATP sintered above 800 °C. It is also demonstrated that cold sintered LAGP-LiTFSI is electrochemically stable in Li symmetric cells over 1800 h at 0.2 mAh cm −2 . Cold sintering provides a new approach for bridging the gap in processing temperatures of different materials, thereby enabling high-performance composites for electrochemical systems.

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“…As shown in Figure S8a (Supporting Information), in accordance with previous reports, [11,35,36] a large total resistance was observed due to high interfacial resistances between Li metal and CS LAGP-LiTFSI. As shown in Figure S8a (Supporting Information), in accordance with previous reports, [11,35,36] a large total resistance was observed due to high interfacial resistances between Li metal and CS LAGP-LiTFSI.…”

Section: Resultssupporting

confidence: 90%

“…As shown in Figure S8a (Supporting Information), in accordance with previous reports, [11,35,36] a large total resistance was observed due to high interfacial resistances between Li metal and CS LAGP-LiTFSI. [36] To reduce interfacial resistances, we added a small amount of liquid electrolyte (4 m lithium bis(fluorosulfonyl) imide salt (LiFSI) in 1,2-dimethoxyethane (DME) (≈5.0 µL cm −2 )) at the electrode contacts, as has been demonstrated previously to promote stable Li plating/stripping with high Coulombic efficiency (CE). [36] To reduce interfacial resistances, we added a small amount of liquid electrolyte (4 m lithium bis(fluorosulfonyl) imide salt (LiFSI) in 1,2-dimethoxyethane (DME) (≈5.0 µL cm −2 )) at the electrode contacts, as has been demonstrated previously to promote stable Li plating/stripping with high Coulombic efficiency (CE).…”

Section: Resultssupporting

confidence: 90%

Ceramic–Salt Composite Electrolytes from Cold Sintering

Lee

Lyon

Seo

et al. 2019

Adv Funct Materials

102

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“…[3] Thus, SSBs have been focused on recently and many kinds of solid electrolyte have been developed, including polymer, [4] garnet, [5] argyrodite, [6] LISICON-type, [7] NASICON-type, [8] and Perovskite-type [9] structure. [3] Thus, SSBs have been focused on recently and many kinds of solid electrolyte have been developed, including polymer, [4] garnet, [5] argyrodite, [6] LISICON-type, [7] NASICON-type, [8] and Perovskite-type [9] structure.…”

Section: Doi: 101002/aenm201801528mentioning

confidence: 99%

Ameliorating the Interfacial Problems of Cathode and Solid‐State Electrolytes by Interface Modification of Functional Polymers

Wang

Zhang

Wang

et al. 2018

Advanced Energy Materials

145

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Solid‐state Li secondary batteries may become high energy density storage devices for the next generation of electric vehicles, depending on the compatibility of electrode materials and suitable solid electrolytes. Specifically, it is a great challenge to obtain a stable interface between these solid electrolytes and cathodes. Herein, this issue can be effectively addressed by constructing a poly(acrylonitrile‐co‐butadiene) coated layer onto the surface of LiNi0.6Mn0.2Co0.2O2 cathode materials. The polymer layer plays a vital role in working as a protective shell to retard side reaction and ameliorate the contact of the solid–solid interface during the cycling process. In the resultant solid‐state batteries, both rate capacity (99 mA h g−1 at 3 C) and cycling stability (75% capacity retention after 400 cycles) are improved after coating. This impressive performance highlights the great importance of layer modification in the cathode and inspires the development of solid‐state batteries toward practical applications.

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“…D. Rettenwander et al [61] employed Raman spectroscopy in combination with nanosecond laser-induced breakdown spectroscopy to find that the cubic-tetragonal transformation also took place in the Fe-doped LLZO. H. Chung et al [186] reported that the interphases of the Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 /Li system were composed of stoichiometrically charged LAGP with Li oxide compounds (such as Li 2 O, Li 2 O 2 , and Li 2 CO 3 with the existence of carbon at the interface). The NASICON-type LATP/LAGP SSEs also showed high reactivity toward Li.…”

Section: Origin Of the Interfacial Resistancementioning

confidence: 99%

“…2019, 9,1901810 [61,175] Raman spectroscopy; [61] In situ TEM [175] Type III LAGP Stoichiometrically charged LAGP and Li oxide compounds (Li 2 O, Li 2 O 2 and Li 2 CO 3 ) [186] XPS Type II LLTO Low-valence oxides (Ti 2 O 3 and TiO) and Ti species [178] In situ XPS Type II The type II interface should be precluded because they will make the SSEs degrade continuously, short-circuiting the batteries.…”

Section: Origin Of the Interfacial Resistancementioning

confidence: 99%

Interfacial Incompatibility and Internal Stresses in All‐Solid‐State Lithium Ion Batteries

Liu

et al. 2019

Advanced Energy Materials

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The continuous depletion of fossil fuels, the increase of oil prices, and the need to decrease CO 2 emissions have stimulated intensive research on developing alternative renewable and clean energy sources. [1] Among these alternative energy sources, rechargeable Li-ion batteries (LIBs) are one of the promising candidates. To date, the LIBs basically consisting of a positive electrode (cathode), an electrolyte, and a negative electrode (anode) have widespread applications, such as portable electronic devices, pure electric vehicles (PEVs), and hybrid electric vehicles (HEVs). [2] The state-of-the-art electrolytes are usually the lithium salts (LiPF 6 , LiBF 4 , and LiCF 3 SO 3 ) dissolved in organic solvents, i.e., ethylene carbonate, propylene carbonate, polyethylene oxide, and dimethyl carbonate, [3] which exhibit excellent wetting of the electrodes and produce a fast transfer of Li + ions upon charging and discharging. However, they suffer from flammability, poor electrochemical stability, limited temperature range of operation, and low power density. [4] There is an ever-increasing demand for batteries with a higher energy and power density, although current LIBs offer volumetric and gravimetric energy densities up to 770 Wh L −1 and 260 Wh kg −1 , respectively. [5] To improve the energy/power density of LIBs, one way is to adopt high-potential cathode materials such as LiNi 0.5 Mn 1.5 O 4 (LNMO). The high-voltage plateau of LNMO (≈4.7 V vs Li/Li + ) makes its energy density 20-30% higher than the energy density of commercial LiCoO 2 and LiFePO 4 . [6] However, successful commercialization of the LNMO is restricted in high-energy LIBs due to electrolyte decomposition and side reaction of the cathodes and liquid electrolytes when operating at high voltages. [7,8] The other way to improve the energy/power density is to replace the conventional graphite anode with Li metal. The Li metal, with a low anode potential (−3.04 V vs standard hydrogen electrode) and high specific capacity (3862 mAh g −1 for the Li anode versus 372 mAh g −1 for the graphite anode), [9][10][11] has been considered as the "Holy Grail" of battery technologies. When paired with sulfur and oxygen, the theoretical energy density of Li-S (≈2567 Wh kg −1 ) and Li-O 2 (≈3505 Wh kg −1 ) batteries is far higher than the theoretical energy density of conventional LIBs (≈387 Wh kg −1 ). [12][13][14][15] When Li metal approaches the liquid electrolytes, however, unstable Li/electrolyte interface Rechargeable Li-ion batteries (LIBs) are electrochemical storage device widely applied in electric vehicles, mobile electronic devices, etc. However, traditional LIBs containing liquid electrolytes suffer from flammability, poor electrochemical stability, and limited operational temperature range. Replacement of the liquid electrolytes with inorganic solid-state electrolytes (SSEs) would solve this problem. However, several critical issues, such as poor interfacial compatibility, low ionic conductivity at ambient temperatures, etc., need to be surmounted befor...

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Mechanical and Thermal Failure Induced by Contact between a Li_1.5Al_0.5Ge_1.5(PO₄)₃ Solid Electrolyte and Li Metal in an All Solid-State Li Cell

Cited by 223 publications

References 23 publications

Ceramic–Salt Composite Electrolytes from Cold Sintering

Ceramic–Salt Composite Electrolytes from Cold Sintering

Ameliorating the Interfacial Problems of Cathode and Solid‐State Electrolytes by Interface Modification of Functional Polymers

Interfacial Incompatibility and Internal Stresses in All‐Solid‐State Lithium Ion Batteries

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