Tailoring grain boundary structures and chemistry of Li7La3Zr2O12 solid electrolytes for enhanced air stability

Jeong, Wooyoung; Park, Seong Soo; Yun, Jonghyeok; Shin, Hong Rim; Moon, Janghyuk; Lee, Jong-Won

doi:10.1016/j.ensm.2022.10.044

Cited by 35 publications

(21 citation statements)

References 51 publications

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“…The activation energy (E a ) of ion conductivity is determined by the Arrhenius relationship, as shown in Equation (2), where 𝜎 T is the ionic con-ductivity corresponding to temperature T, 𝜎 0, and R are the Arrhenius constant and gas constant, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…The development of electric vehicles and grid‐scale energy storage needs high energy density and high safety of battery technologies. [ 1 ] Recent catastrophic accidents of the spontaneous combustion of electric vehicles [ 2 ] and the fire of energy storage plants [ 3 ] have further validated the urgency to improve battery safety and energy density. [ 4 ] Solid‐state Li metal batteries are practically promising because they are safer than flammable organic electrolyte‐based batteries, [ 5–7 ] and they may solve the problem of dendrite growth so that Li metal can be used as anode.…”

Section: Introductionmentioning

confidence: 99%

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LiPF₆ Induces Phosphorization of Garnet‐Type Solid‐State Electrolyte for Stable Lithium Metal Batteries

Chen,

Gui,

Yang

et al. 2023

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Garnet solid electrolyte Li6.4La3Zr1.4Ta0.6O12 (LLZTO) is an excellent inorganic ceramic‐type solid electrolyte; however, the presence of Li2CO3 impurities on its surface hinders Li‐ion transport and increases the interface impedance. In contrast to traditional methods of mechanical polishing, acid corrosion, and high‐temperature reduction for removing Li2CO3, herein, a straightforward “waste‐to‐treasure” strategy is proposed to transform Li2CO3 into Li3PO4 and LiF in LiPF6 solution under 60 °C. It is found that the formation of Li3PO4 during LLZTO pretreatment facilitates rapid Li‐ion transport and enhances ionic conductivity, and the LLZTO/PAN composite polymer electrolyte shows the highest Li‐ion transference number of 0.63. Additionally, the dense LiF layer serves to safeguard the internal garnet solid electrolyte against solvent decomposition‐induced chemical adsorption. Symmetric Li/Li cells assembled with treated LLZTO/PAN composite electrolyte exhibit a critical current density of 1.1 mA cm−2 and a long lifespan of up to 700 h at a current density of 0.2 mA cm−2. The Li/LiFePO4 solid‐state cells demonstrate stable cycling performances for 141 mAh g−1 at 0.5 C, with capacity retention of 93.6% after 190 cycles. This work presents a novel approach to converting waste into valuable resources, offering the advantages of simple processes, and minimal side reactions.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

LiPF₆ Induces Phosphorization of Garnet‐Type Solid‐State Electrolyte for Stable Lithium Metal Batteries

Chen,

Gui,

Yang

et al. 2023

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“…They conducted ADT analysis combined with compositional analyses and microstructural analyses and confirmed that Ga substitution into LLZTO plays a significant role in reducing the grain boundary density and suppressing the degradation of Li + by migrating the formation and growth of Li 2 CO 3 , as shown in Figure 4g. [ 79 ]…”

Section: Solid Electrolytementioning

confidence: 99%

Solid Electrolyte: Strategies to Address the Safety of All Solid‐State Batteries

Park

Han

Chaudhary

et al. 2023

Adv Energy and Sustain Res

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Lithium metal batteries (LMBs) are in the spotlight as a next‐generation battery due to their high theoretical capacity. However, LMBs still suffer from inferior cycle stability owing to dendritic lithium (Li) growth during Li plating and stripping, leading to battery explosion. To solve this problem, solid electrolytes have emerged as a promising candidate by suppressing the dendritic Li growth. Despite numerous efforts, however, many challenges, such as low ionic conductivity, air stability, space charge layer, and contact loss issues, have been encountered. This review aims to provide the current challenges and new insights of solid electrolytes and then explore optimal solutions for next‐generation solid electrolytes.

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“…The LiGaO 2 , in the form of a transient liquid phase at the grain boundary, promotes mass transfer. 39,40 Ultimately, this leads to the completion of the densication process in porous GLLZO ceramics.…”

Section: Reaction Sintering Mechanismmentioning

confidence: 99%

Porous Ga_0.25Li_6.25La₃Zr₂O₁₂ frameworks by gelcasting–reaction sintering for high-performance hybrid quasi-solid lithium metal batteries

Zhou,

Tian,

Wang

et al. 2023

J. Mater. Chem. A

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Tailoring grain boundary structures and chemistry of Li7La3Zr2O12 solid electrolytes for enhanced air stability

Cited by 35 publications

References 51 publications

LiPF₆ Induces Phosphorization of Garnet‐Type Solid‐State Electrolyte for Stable Lithium Metal Batteries

LiPF₆ Induces Phosphorization of Garnet‐Type Solid‐State Electrolyte for Stable Lithium Metal Batteries

Solid Electrolyte: Strategies to Address the Safety of All Solid‐State Batteries

Porous Ga_0.25Li_6.25La₃Zr₂O₁₂ frameworks by gelcasting–reaction sintering for high-performance hybrid quasi-solid lithium metal batteries

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Tailoring grain boundary structures and chemistry of Li7La3Zr2O12 solid electrolytes for enhanced air stability

Cited by 35 publications

References 51 publications

LiPF6 Induces Phosphorization of Garnet‐Type Solid‐State Electrolyte for Stable Lithium Metal Batteries

LiPF6 Induces Phosphorization of Garnet‐Type Solid‐State Electrolyte for Stable Lithium Metal Batteries

Solid Electrolyte: Strategies to Address the Safety of All Solid‐State Batteries

Porous Ga0.25Li6.25La3Zr2O12 frameworks by gelcasting–reaction sintering for high-performance hybrid quasi-solid lithium metal batteries

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Product

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LiPF₆ Induces Phosphorization of Garnet‐Type Solid‐State Electrolyte for Stable Lithium Metal Batteries

LiPF₆ Induces Phosphorization of Garnet‐Type Solid‐State Electrolyte for Stable Lithium Metal Batteries

Porous Ga_0.25Li_6.25La₃Zr₂O₁₂ frameworks by gelcasting–reaction sintering for high-performance hybrid quasi-solid lithium metal batteries