Ceramic separators based on Li+-conducting inorganic electrolyte for high-performance lithium-ion batteries with enhanced safety

Jung, Yun-Chae; Kim, Seul-Ki; Kim, Moon-Sung; Lee, Jeong-Hye; Han, Man-Seok; Kim, Duck-Hyun; Shin, Weon Ho; Ue, Makoto; Kim, Dong-Won

doi:10.1016/j.jpowsour.2015.06.001

Cited by 93 publications

(56 citation statements)

References 40 publications

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“…Lithium-ion conductivities in the argyrodites, 14 thio-LISICON, 23 diminished flammability. 37,42 The enhanced stability and safety of solid-state inorganic electrolytes provides opportunities to simplify and redesign safety measures currently used in the battery cell, for example, overpressure vents or chargeinterruption devices as well as sophisticated thermal management systems or constraints in the operational strategy in the battery pack. Although many solid-state electrolytes are found to have a wide electrochemical stability window, there are still numerous fast ion conductors reported to date that are unstable at low potentials against negative electrodes such as graphite and metallic lithium, 43 requiring the use of electrode materials such as titanates.…”

Section: Introduction: Applications Of Solid-state Electrolytesmentioning

confidence: 99%

“…44 Fast ion conductors can also react with positive electrode materials, resulting in low interfacial charge-transfer kinetics. 36,37 Although structural tuning by substitution within a given structural family can enhance lithium-ion conductivity, there is a lack of fundamental understanding to establish a universal guide for fast ion conductors among different structural families. Thus, it is not straightforward to predict the most conducting structure/composition, which limits the design of new or multilayer lithium-ion conductors with enhanced conductivity and stability in order to meet all the requirements of solid-state lithium-ion batteries.…”

Section: Introduction: Applications Of Solid-state Electrolytesmentioning

confidence: 99%

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Inorganic Solid-State Electrolytes for Lithium Batteries: Mechanisms and Properties Governing Ion Conduction

Bachman¹,

Muy²,

Grimaud³

et al. 2015

Chem. Rev.

1,987

1,656

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This Review is focused on ion-transport mechanisms and fundamental properties of solid-state electrolytes to be used in electrochemical energy-storage systems. Properties of the migrating species significantly affecting diffusion, including the valency and ionic radius, are discussed. The natures of the ligand and metal composing the skeleton of the host framework are analyzed and shown to have large impacts on the performance of solid-state electrolytes. A comprehensive identification of the candidate migrating species and structures is carried out. Not only the bulk properties of the conductors are explored, but the concept of tuning the conductivity through interfacial effects-specifically controlling grain boundaries and strain at the interfaces-is introduced. High-frequency dielectric constants and frequencies of low-energy optical phonons are shown as examples of properties that correlate with activation energy across many classes of ionic conductors. Experimental studies and theoretical results are discussed in parallel to give a pathway for further improvement of solid-state electrolytes. Through this discussion, the present Review aims to provide insight into the physical parameters affecting the diffusion process, to allow for more efficient and target-oriented research on improving solid-state ion conductors.

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Section: Introduction: Applications Of Solid-state Electrolytesmentioning

confidence: 99%

Section: Introduction: Applications Of Solid-state Electrolytesmentioning

confidence: 99%

Inorganic Solid-State Electrolytes for Lithium Batteries: Mechanisms and Properties Governing Ion Conduction

Bachman¹,

Muy²,

Grimaud³

et al. 2015

Chem. Rev.

1,987

1,656

View full text Add to dashboard Cite

show abstract

“…24 In our previous study, the hybrid separators based on a garnet-structured lithium ion conductor (lithium lanthanum zirconium oxide, LLZO) were applied to a lithium-ion cell composed of a graphite negative electrode and a LiCoO 2 positive electrode. 25 The cell assembled with a hybrid separator containing liquid electrolyte * Electrochemical Society Member.z E-mail: dongwonkim@hanyang.ac.kr exhibited good cycling performance and enhanced safety compared to those of a cell with a polyolefin separator and liquid electrolyte. The hybrid separator was prepared by directly casting a slurry containing LLZO, poly(vinylidene fluoride-co-hexafluoropropylene) (P(VdF-co-HFP)) and dibutyl phthalate (DBP) in acetone onto the as-prepared negative electrode.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

Lithium-Ion Cells Assembled with Flexible Hybrid Membrane Containing Li⁺-Conducting Lithium Aluminum Germanium Phosphate

Kim

Jung

Kim

et al. 2016

J. Electrochem. Soc.

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Hybrid membranes composed of 90 wt% Li + -conducting inorganic electrolyte (lithium aluminum germanium phosphate, LAGP) and 10 wt% poly(vinylidene fluoride-co-hexafluoropropylene) (P(VdF-co-HFP)) polymer were prepared in the form of a flexible thin film and directly formed on the as-prepared negative electrode. The lithium-ion cells assembled with the hybrid membrane exhibited superior cycling performance in terms of discharge capacity, capacity retention, rate capability and high temperature cycling stability, as compared to the cell with polypropylene separator and liquid electrolyte. The use of hybrid membranes allowed improve thermal properties compared to conventional polyolefin separator and use less amount of flammable liquid electrolyte, resulting in enhancement of thermal safety of the cell. Lithium-ion batteries have been predominantly used as power sources for portable electronic devices and are now being extensively developed as potential power sources for electric vehicles and energy storage systems because of their high energy density and long cycle life.1-8 However, the full utilization of these batteries is still challenging for future large-capacity energy storage applications due to the safety issues caused by the flammable nature of the liquid electrolyte. In addition, the polyolefin separators used in current lithium-ion batteries may shrink and even melt at elevated temperatures, which causes a short circuit between two electrodes in cases where unusually high heat is generated, leading to fire and explosion. [10][11][12] Furthermore, the large difference in polarity between hydrophobic polyolefin separators without surface treatment and polar organic solvents leads to poor wettability, resulting in high ionic resistance during cycling. 13 In this respect, extensive studies have been carried out on inorganic solid electrolytes without a polymer separator as an alternative electrolyte for improving the safety of lithium-ion batteries.14-18 However, many inorganic materials require a thermal sintering at high temperatures to form a pellet-type solid electrolyte. In addition, a lack of flexibility results in poor interfacial contact between the inorganic solid electrolyte and solid electrodes in the cell during charge and discharge cycling. To solve these problems, the hybrid solid electrolytes composed of an inorganic electrolyte and flexible polymer have been investigated. [19][20][21][22][23] However, it is still challenging to secure competitive cycling performance when compared to liquid electrolyte-based lithium-ion batteries. The most critical issue to be solved in cells employing an inorganic electrolyte is high interfacial resistances between electrolyte and electrodes due to the solid-on-solid interface in the cells. Therefore, it is highly desirable to minimize the interfacial resistances at solid-solid interfaces while enhancing battery safety and maintaining a cycling performance competitive to that of lithium-ion batteries that employ conventional polyolefin separator and organic ...

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“…[7][8][9][10][11][12][13] 내열성 고분자 코팅은 내열성 이 높은 고분자 (Polyimide, Polydopamine 등)로 분 리막에 코팅하여 열 안정성을 향상시키는 방법이다. [14][15][16] 가교 고분자 코팅은 가교제를 코팅한 후 전자선 및 에너지를 주어 고분자 사슬이 가교하여 분리막의 기 계적 물성 및 열 안정성을 향상시키는 방법이다.…”

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Nano Ceramic Coating on Polypropylene Separator for Safety-Enhanced Lithium Secondary Battery

Lee¹,

Jeon²,

Han³

et al. 2017

Journal of the Korean Electrochemical Society

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Ceramic separators based on Li+-conducting inorganic electrolyte for high-performance lithium-ion batteries with enhanced safety

Cited by 93 publications

References 40 publications

Inorganic Solid-State Electrolytes for Lithium Batteries: Mechanisms and Properties Governing Ion Conduction

Inorganic Solid-State Electrolytes for Lithium Batteries: Mechanisms and Properties Governing Ion Conduction

Lithium-Ion Cells Assembled with Flexible Hybrid Membrane Containing Li⁺-Conducting Lithium Aluminum Germanium Phosphate

Nano Ceramic Coating on Polypropylene Separator for Safety-Enhanced Lithium Secondary Battery

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Ceramic separators based on Li+-conducting inorganic electrolyte for high-performance lithium-ion batteries with enhanced safety

Cited by 93 publications

References 40 publications

Inorganic Solid-State Electrolytes for Lithium Batteries: Mechanisms and Properties Governing Ion Conduction

Inorganic Solid-State Electrolytes for Lithium Batteries: Mechanisms and Properties Governing Ion Conduction

Lithium-Ion Cells Assembled with Flexible Hybrid Membrane Containing Li+-Conducting Lithium Aluminum Germanium Phosphate

Nano Ceramic Coating on Polypropylene Separator for Safety-Enhanced Lithium Secondary Battery

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Product

Resources

About

Lithium-Ion Cells Assembled with Flexible Hybrid Membrane Containing Li⁺-Conducting Lithium Aluminum Germanium Phosphate