In Batteria Polyaniline Coating: In Batteria Electrochemical Polymerization to Form a Protective Conducting Layer on Se/C Cathodes for High‐Performance Li–Se Batteries (Adv. Funct. Mater. 19/2020)

Lee, Seungmin; Lee, Haeun; Ha, Naram; Lee, Jung Tae; Jung, Jaehan; Eom, KwangSup

doi:10.1002/adfm.202070124

Cited by 6 publications

(7 citation statements)

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“…The binding energy of various N configurations obviously shifted negative in the discharge process compared to the pristine status, implying that the positively charged N sites of 3D NHMCs/Se are partially balanced by Se n molecules which possess a higher electron density. [ 22 ] The XPS results reveal that the doped N species in the hierarchical multicavity carbon host could greatly boost the redox active sites with absorbed Na + and trap soluble NaPSe intermediate, which is of critical importance for effectively enhancing capacity retention and restraining the shuttle effect.…”

Section: Resultsmentioning

confidence: 99%

Hierarchical Multicavity Nitrogen‐Doped Carbon Nanospheres as Efficient Polyselenide Reservoir for Fast and Long‐Life Sodium‐Selenium Batteries

Zhong

et al. 2020

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Sodium‐selenium (Na‐Se) battery has been emerging as one of the most prospective energy storage systems owing to their high volumetric energy density and cost effectiveness. Nevertheless, the shuttle effect of sodium polyselenide (NaPSe) and sluggish electrochemical reaction kinetics present the main bottlenecks for its practical implementation. Herein, a new Se host of 3D nitrogen‐doped hierarchical multicavity carbon nanospheres (3D NHMCs) is designed and synthesized via a facile self‐sacrifice templating strategy. The 3D NHMCs are verified to hold a favorable structure of a hollow macropore core and numerous micro/mesopores hollow shell for hosting Se, which can not only maximize Se utilization and alleviate the volumetric expansion but also promote the electrical/ionic conductivity and electrolyte infiltration. Moreover, the abundant self‐functionalized surfaces as an efficient NaPSe scavenger via robust physical‐chemical dual blocking effects demonstrate high‐efficiency in situ anchoring‐diffusion‐conversion of NaPSe, rendering rapid reaction kinetics and remarkable suppressive shuttle effect, as evidenced by systematic experimental analysis and density functional theory calculations. As a result, the high‐Se‐loading 3D NHMCs/Se cathode exhibits an ultrahigh volumetric capacity (863 mAh cm−3) and rate capability (377 mAh g−1 at 20 C) and unexceptionable stability over 2000 cycles at 2 C.

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Section: Resultsmentioning

confidence: 99%

Hierarchical Multicavity Nitrogen‐Doped Carbon Nanospheres as Efficient Polyselenide Reservoir for Fast and Long‐Life Sodium‐Selenium Batteries

Zhong

et al. 2020

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“…Recently, Lee et al. [ 67 ] proposed a facile in‐battery electrochemical polymerization for fabricating PANI coated Se/C cathode, where the aniline monomer was pre‐added in the electrolyte. After cell assembly, a programmed electrochemical process was employed to induce the polymerization of aniline.…”

Section: Cathodesmentioning

confidence: 99%

Section: Cathodesmentioning

confidence: 99%

State‐Of‐The‐Art and Future Challenges in High Energy Lithium–Selenium Batteries

Sun

Liu

et al. 2021

Advanced Materials

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Li‐chalcogen batteries, especially the Li–S batteries (LSBs), have received paramount interests as next generation energy storage techniques because of their high theoretical energy densities. However, the associated challenges need to be overcome prior to their commercialization. Elemental selenium, another chalcogen member, would be an attractive alternative to sulfur owing to its higher electronic conductivity, comparable capacity density, and moreover, excellent compatibility with carbonate electrolytes. Unlike LSBs, the research and development of Li–Se batteries (LSeBs) have garnered burgeoning attention but are still in their infant stage, where a comprehensive yet in‐depth overview is highly imperative to guide future research. Herein, a critical review of LSeBs, in terms of the underlying mechanisms, cathode design, blocking layer engineering, and emerging solid‐state electrolytes is provided. First, the electrolyte‐dependent electrochemistry of LSeBs is discussed. Second, the advances in Se‐based cathodes are comprehensively summarized, especially highlighting the state‐of‐the‐art SexSy cathodes, and mainly focusing on their structures, compositions, and synthetic strategies. Third, the versatile separators/interlayers optimization and interface regulation are outlined, with a particular focus on the emerging solid‐state electrolytes for advanced LSeBs. Last, the remaining challenges and research orientations in this booming field are proposed, which are expected to motivate more insightful works.

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“…The electrolyte‐dependent lithiation/delithiation behavior of the Se cathode stems from the physical/chemical properties of the organic electrolytes, such as solubility and reactivity, which results in a highly complex and unsafe Li–Se battery system that meet commercial standards. [ 7–9 ]…”

Section: Introductionmentioning

confidence: 99%

Highly Stable Halide‐Electrolyte‐Based All‐Solid‐State Li–Se Batteries

Liang

Kim

et al. 2022

Advanced Materials

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Solid‐state Li–S and Li–Se batteries are promising devices that can address the safety and electrochemical stability issues that arise from liquid‐based systems. However, solid‐state Li–Se/S batteries usually present poor cycling stability due to the high resistance interfaces and decomposition of solid electrolytes caused by their narrow electrochemical stability windows. Here, an integrated solid‐state Li–Se battery based on a halide Li3HoCl6 solid electrolyte with high ionic conductivity is presented. The intrinsic wide electrochemical stability window of the Li3HoCl6 and its stability toward Se and the lithiated species effectively inhibit degeneration of the electrolyte and the Se cathode by suppressing side reactions. The inherent thermodynamic mechanism of the lithiation/delithiation process of the Se cathode in solid is also revealed and confirmed by theoretical calculations. The battery achieves a reversible capacity of 402 mAh g−1 after 750 cycles. The electrochemical performance, thermodynamic lithiation/delithiation mechanism, and stability of metal‐halide‐based Li–Se batteries confer theoretical study and practical applicability that extends to other energy‐storage systems.

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In Batteria Polyaniline Coating: In Batteria Electrochemical Polymerization to Form a Protective Conducting Layer on Se/C Cathodes for High‐Performance Li–Se Batteries (Adv. Funct. Mater. 19/2020)

Cited by 6 publications

References 0 publications

Hierarchical Multicavity Nitrogen‐Doped Carbon Nanospheres as Efficient Polyselenide Reservoir for Fast and Long‐Life Sodium‐Selenium Batteries

Hierarchical Multicavity Nitrogen‐Doped Carbon Nanospheres as Efficient Polyselenide Reservoir for Fast and Long‐Life Sodium‐Selenium Batteries

State‐Of‐The‐Art and Future Challenges in High Energy Lithium–Selenium Batteries

Highly Stable Halide‐Electrolyte‐Based All‐Solid‐State Li–Se Batteries

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