2023 |
24 |
Annealing-Free Thioantimonate Argyrodites with High Li-Ion Conductivity and Low Elastic Modulus
Wo Dum Jung, Ji-Su Kim, Young Jung Kim, Hyeseong Jeong, Daseul Han, Kyung-Wan Nam, Docheon Ahn, Deok-Hwang Kwon, Hun-Gi Jung, Jong-Ho Lee, and Hyoungchul Kim
Advanced Functional Materials,
2023.3.9, Wiley, published
Although Li-ion superconducting sulfides have been developed as solid electrolytes (SEs) in all-solid-state batteries, their high deformability, which is inherently beneficial for room-temperature compaction, is overlooked and sacrificed. To solve this dilemmatic task, herein, highly deformable Li-ion superconductors are reported using an annealing-free process. The target thioantimonate, Li5.2Si0.2Sb0.8S4Br0.25I1.75, comprising bimetallic tetrahedra and bi-halogen anions is synthesized by two-step milling tuned for in situ crystallization, and exhibits excellent Li-ion conductivity (σion) of 13.23 mS cm−1 (averaged) and a low elastic modulus (E) of 12.51 GPa (aver-aged). It has a cubic argyrodite phase of ≈57.39% crystallinity with a halogen occupancy of ≈90.67% at the 4c Wyckoff site. These increased halogen occupancy drives the Li-ion redistribution and the formation of more Li vacancies, thus facilitating Li-ion transport through inter-cage pathway. Also, the facile annealing-free process provides a unique glass-ceramic structure advantageous for high deformability. These results represent a record-breaking milestone from the combined viewpoint of σion and E among promising SEs. Electrochemical characterization, including galvanostatic cycling tests for 400 h, reveals that this material displays reasonable electrochemical stability and cell performance (150.82 mAh g−1 at 0.1C). These achievements shed light on the synthesis of practical SEs suffice both σion and E requirements. |
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23 |
Structural mapping and tuning of mixed halide ions in amorphous sulfides for fast Li-ion conduction and high deformability
Ji-Su Kim, Young Jung Kim, Daseul Han, Kyung-Wan Nam, Gihan Kwon, Tae Wook Heo, Hun-Gi Jung, Kyung Joong Yoon, and Hyoungchul Kim
J. Mater. Chem. A,
11,
2023.03.20, Journal of Materials Chemistry A, published
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2022 |
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20 |
Facile Method for the Formation of Intimate Interfaces in SulfideBased All-Solid-State Batteries
Bin-Na Yun, Seongsoo Lee, Wo Dum Jung, Hyeon-Ji Shin, Jun Tae Kim, Seungho Yu, Kyung Yoon Chung, Hyoungchul Kim*, and Hun-Gi Jung*
ACS Applied Materials&Interfaces,
14,
2022.02.14, published
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2021 |
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17 |
Roles of Polymerized Anionic Clusters Stimulating for Hydrolysis Deterioration in Li7P3S11
김지수, 정으뜸, 신성수, 양성은, 박상백, 이종호, 김병국, 이종흔, 김형철
The Journal of Physical Chemistry C,
125,
2021.08.25, ACS Publications, published
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16 |
Quantitative determination of lithium depletion during rapid cycling in sulfide-based all-solid-state batteries
신성수, 김지수, 최성준, 지호일, 윤경중, 이종호, 정경윤, 김형철
Chemical Communications,
57,
2021.03.09, published
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2020 |
15 |
Functionalized Sulfide Solid Electrolyte with Air-Stable and Chemical-Resistant Oxysulfide Nanolayer for All-Solid-State Batteries
정으뜸, 전민재, 신성수, 김지수, 정훈기, 김병국, 이종흔, 정용재, 김형철
ACS OMEGA,
5 (26015-26022),
2020.10, published
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13 |
Superionic Halogen-Rich Li-Argyrodites Using In Situ Nanocrystal Nucleation and Rapid Crystal Growth
정으뜸, 김지수, 최성준, 김성민, 전민재, 정훈기, 정경윤, 이종호, 김병국, 이종흔, 김형철
Nano Letters,
20, 4(2303-2309),
2020.02, published
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11 |
Robust Solid-State Interface with a Deformable Glass Interlayer in Ssulfidebased All-Solid-State Batteries
최성준, 전민재, 정으뜸, 양성은, 박상백, 지호일, 이종호, 김병국, 상병인, 김형철
Solid State Ionics,
346(115217-115222),
2020.01, published
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2019 |
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