Dataset Information

Epitaxial Growth of Nanostructured Li₂ Se on Lithium Metal for All Solid-State Batteries.

ABSTRACT: Lithium is considered to be the ultimate anode material for high energy-density rechargeable batteries. Recent emerging technologies of all solid-state batteries based on sulfide-based electrolytes raise hope for the practical use of lithium, as it is likely to suppress lithium dendrite growth. However, such devices suffer from undesirable side reactions and a degradation of electrochemical performance. In this work, nanostructured Li₂ Se epitaxially grown on Li metal by chemical vapor deposition are investigated as a protective layer. By adjusting reaction time and cooling rate, a morphology of as-prepared Li₂ Se is controlled, resulting in nanoparticles, nanorods, or nanowalls with a dominant (220) plane parallel to the (110) plane of the Li metal substrate. Uniaxial pressing the layers under a pressure of 50 MPa for a cell preparation transforms more compact and denser. Dual compatibility of the Li₂ Se layers with strong chemical bonds to Li metal and uniform physical contact to a Li₆ PS₅ Csulfide electrolyte prevents undesirable side reactions and enables a homogeneous charge transfer at the interface upon cycling. As a result, a full cell coupled with a LiCoO₂ -based cathode shows significantly enhanced electrochemical performance and demonstrates the practical use of Li anodes with Li₂ Se layers for all solid-state battery applications.

SUBMITTER: Park H

PROVIDER: S-EPMC8188223 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature

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Epitaxial Growth of Nanostructured Li<sub>2</sub> Se on Lithium Metal for All Solid-State Batteries.

Park Hyunjung H Kim Jeongheon J Lee Dongsoo D Park Joonhyeok J Jo Seonghan S Kim Jaeik J Song Taeseup T Paik Ungyu U

Advanced science (Weinheim, Baden-Wurttemberg, Germany) 20210409 11

Lithium is considered to be the ultimate anode material for high energy-density rechargeable batteries. Recent emerging technologies of all solid-state batteries based on sulfide-based electrolytes raise hope for the practical use of lithium, as it is likely to suppress lithium dendrite growth. However, such devices suffer from undesirable side reactions and a degradation of electrochemical performance. In this work, nanostructured Li<sub>2</sub> Se epitaxially grown on Li metal by chemical vapo ...[more]

PMID: 34105278

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Project description:The advancement of all-solid-state lithium metal batteries requires breakthroughs in solid-state electrolytes (SSEs) for the suppression of lithium dendrite growth at high current densities and high capacities (>3 mAh cm-2) and innovation of SSEs in terms of crystal structure, ionic conductivity and rigidness. Here we report a superionic conducting, highly lithium-compatible and air-stable vacancy-rich β-Li3N SSE. This vacancy-rich β-Li3N SSE shows a high ionic conductivity of 2.14 × 10-3 S cm-1 at 25 °C and surpasses almost all the reported nitride-based SSEs. A Li- and N-vacancy-mediated fast lithium-ion migration mechanism is unravelled regarding vacancy-triggered reduced activation energy and increased mobile lithium-ion population. All-solid-state lithium symmetric cells using vacancy-rich β-Li3N achieve breakthroughs in high critical current densities up to 45 mA cm-2 and high capacities up to 7.5 mAh cm-2, and ultra-stable lithium stripping and plating processes over 2,000 cycles. The high lithium compatibility mechanism of vacancy-rich β-Li3N is unveiled as intrinsic stability to lithium metal. In addition, β-Li3N possesses excellent air stability through the formation of protection surfaces. All-solid-state lithium metal batteries using the vacancy-rich β-Li3N as SSE interlayers and lithium cobalt oxide (LCO) and Ni-rich LiNi0.83Co0.11Mn0.06O2 (NCM83) cathodes exhibit excellent battery performance. Extremely stable cycling performance is demonstrated with high capacity retentions of 82.05% with 95.2 mAh g-1 over 5,000 cycles at 1.0 C for LCO and 92.5% with 153.6 mAh g-1 over 3,500 cycles at 1.0 C for NCM83. Utilizing the vacancy-rich β-Li3N SSE and NCM83 cathodes, the all-solid-state lithium metal batteries successfully accomplished mild rapid charge and discharge rates up to 5.0 C, retaining 60.47% of the capacity. Notably, these batteries exhibited a high areal capacity, registering approximately 5.0 mAh cm-2 for the compact pellet-type cells and around 2.2 mAh cm-2 for the all-solid-state lithium metal pouch cells.

Dataset Information

Epitaxial Growth of Nanostructured Li₂ Se on Lithium Metal for All Solid-State Batteries.

Publications

Epitaxial Growth of Nanostructured Li<sub>2</sub> Se on Lithium Metal for All Solid-State Batteries.

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Epitaxial Growth of Nanostructured Li2 Se on Lithium Metal for All Solid-State Batteries.

Publications

Epitaxial Growth of Nanostructured Li<sub>2</sub> Se on Lithium Metal for All Solid-State Batteries.

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OmicsDI is part of the ELIXIR infrastructure

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Epitaxial Growth of Nanostructured Li₂ Se on Lithium Metal for All Solid-State Batteries.