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Title: Rational Design of High-Loading Sulfur Cathodes with a Poached-Egg-Shaped Architecture for Long-Cycle Lithium–Sulfur Batteries

A high-loading electrode is essential for establishing high-energy-density lithium-sulfur (Li-S) batteries, but it is confronted with critical challenges. Here in this paper, we present a freestanding poached-egg-shaped architecture through a facile template supported vacuum-filtration strategy and employ it as an efficient sulfur host for Li-S batteries. This unique architecture guarantees an effective encapsulation of the “sulfur yolk” inside the fully vacuum sealed framework, effectively limiting the active material loss and polysulfide diffusion. Also, the conductive and porous framework serves as an interlinked electron pathway and electrolyte channel, greatly facilitating fast electric/ionic transport along with active material reactivation and reutilization during cycling. A high peak discharge capacity (1200 mA h g -1), a low capacity-fade rate (0.09% cycle-1) for 500 cycles, and excellent rate capability (C/5-1C rates) are accomplished. Moreover, with such an advantageous architecture, the sulfur loading is successfully increased to 32 mg cm -2 to achieve an areal capacity of up to 16 mA h cm -2. This work provides guidelines for realizing optimized highloading Li-S batteries.
Authors:
 [1] ; ORCiD logo [1]
  1. Univ. of Texas, Austin, TX (United States). McKetta Dept. of Chemical Engineering & Texas Materials Inst.
Publication Date:
Grant/Contract Number:
EE0007218
Type:
Accepted Manuscript
Journal Name:
ACS Energy Letters
Additional Journal Information:
Journal Volume: 2; Journal Issue: 10; Journal ID: ISSN 2380-8195
Publisher:
American Chemical Society (ACS)
Research Org:
Univ. of Texas, Austin, TX (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE
OSTI Identifier:
1430183

Luo, Liu, and Manthiram, Arumugam. Rational Design of High-Loading Sulfur Cathodes with a Poached-Egg-Shaped Architecture for Long-Cycle Lithium–Sulfur Batteries. United States: N. p., Web. doi:10.1021/acsenergylett.7b00697.
Luo, Liu, & Manthiram, Arumugam. Rational Design of High-Loading Sulfur Cathodes with a Poached-Egg-Shaped Architecture for Long-Cycle Lithium–Sulfur Batteries. United States. doi:10.1021/acsenergylett.7b00697.
Luo, Liu, and Manthiram, Arumugam. 2017. "Rational Design of High-Loading Sulfur Cathodes with a Poached-Egg-Shaped Architecture for Long-Cycle Lithium–Sulfur Batteries". United States. doi:10.1021/acsenergylett.7b00697. https://www.osti.gov/servlets/purl/1430183.
@article{osti_1430183,
title = {Rational Design of High-Loading Sulfur Cathodes with a Poached-Egg-Shaped Architecture for Long-Cycle Lithium–Sulfur Batteries},
author = {Luo, Liu and Manthiram, Arumugam},
abstractNote = {A high-loading electrode is essential for establishing high-energy-density lithium-sulfur (Li-S) batteries, but it is confronted with critical challenges. Here in this paper, we present a freestanding poached-egg-shaped architecture through a facile template supported vacuum-filtration strategy and employ it as an efficient sulfur host for Li-S batteries. This unique architecture guarantees an effective encapsulation of the “sulfur yolk” inside the fully vacuum sealed framework, effectively limiting the active material loss and polysulfide diffusion. Also, the conductive and porous framework serves as an interlinked electron pathway and electrolyte channel, greatly facilitating fast electric/ionic transport along with active material reactivation and reutilization during cycling. A high peak discharge capacity (1200 mA h g-1), a low capacity-fade rate (0.09% cycle-1) for 500 cycles, and excellent rate capability (C/5-1C rates) are accomplished. Moreover, with such an advantageous architecture, the sulfur loading is successfully increased to 32 mg cm-2 to achieve an areal capacity of up to 16 mA h cm-2. This work provides guidelines for realizing optimized highloading Li-S batteries.},
doi = {10.1021/acsenergylett.7b00697},
journal = {ACS Energy Letters},
number = 10,
volume = 2,
place = {United States},
year = {2017},
month = {8}
}