Chemical Immobilization and Conversion of Active Polysulfides Directly by Copper Current Collector: A New Approach to Enabling Stable Room-Temperature Li-S and Na-S Batteries

Li, Peirong; Ma, Lu; Wu, Tianpin; Ye, Hualin; Zhou, Junhua; Zhao, Feipeng; Han, Na; Wang, Yeyun; Wu, Yunling; Li, Yanguang; Lu, Jun

doi:10.1002/aenm.201800624

Title: Chemical Immobilization and Conversion of Active Polysulfides Directly by Copper Current Collector: A New Approach to Enabling Stable Room-Temperature Li-S and Na-S Batteries

Journal Article · Wed May 16 00:00:00 EDT 2018 · Advanced Energy Materials

DOI:https://doi.org/10.1002/aenm.201800624· OSTI ID:1480523

Li, Peirong ^[1]; Ma, Lu ^[2]; Wu, Tianpin ^[2]; Ye, Hualin ^[1]; Zhou, Junhua ^[1]; Zhao, Feipeng ^[1]; Han, Na ^[1]; Wang, Yeyun ^[1]; Wu, Yunling ^[1]; Li, Yanguang ^[1];

^[2]

Soochow Univ., Suzhou (China)
Argonne National Lab. (ANL), Lemont, IL (United States)

Abstract Room‐temperature Li/Na‐S batteries are promising energy storage solutions, but unfortunately suffer from serious cycling problems rooted in their polysulfide intermediates. The conventional strategy to tackle this issue is to design host materials for trapping polysulfides via weak physical confinement and interfacial chemical interactions. Even though beneficial, their capability for the polysulfide immobilization is still limited. Herein, the unique sulfiphilic nature of metallic Cu is revisited. Upon the exposure to polysulfide in aqueous or aprotic solution, the surface sulfidization rapidly takes place, resulting in the formation of Cu ₂ S nanoflake arrays with tunable texture. When the sulfidized Cu current collector is directly used as the sulfur‐equivalent cathode, it enables high‐performance Li/Na‐S batteries at room temperature with reasonable high sulfur loading. Specific capacities up to ≈1200 mAh g ⁻¹ for Li‐S and ≈400 mAh g ⁻¹ for Na‐S are measured when normalized to the amount of equivalent sulfur, and can be readily sustained for >1000 cycles.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC02-06CH11357; DE‐AC02‐06CH11357

OSTI ID:: 1480523

Alternate ID(s):: OSTI ID: 1437316

Journal Information:: Advanced Energy Materials, Vol. 8, Issue 22; ISSN 1614-6832

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 59 works

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25 ENERGY STORAGE
Li-S batteries
Na-S batteries
chemical immobilization of polysulfide
sulfiphilic Cu foam
sulfur-equivalent cathodes