Molybdenum Boride as an Efficient Catalyst for Polysulfide Redox to Enable High‐Energy‐Density Lithium–Sulfur Batteries
Abstract
Abstract Lithium–sulfur (Li–S) batteries, despite having high theoretical specific energy, possess many practical challenges, including lithium polysulfide (LiPS) shuttling. To address the issues, here, hydrophilic molybdenum boride (MoB) nanoparticles are presented as an efficient catalytic additive for sulfur cathodes. The high conductivity and rich catalytically active sites of MoB nanoparticles allow for a fast kinetics of LiPS redox in high‐sulfur‐loading electrodes (6.1 mg cm −2 ). Besides, the hydrophilic properties and good wettability toward electrolyte of MoB can facilitate electrolyte penetration and LiPS redox, guaranteeing a high utilization of sulfur under a lean‐electrolyte condition. Therefore, the cells with MoB achieve impressive electrochemical performance, including a high capacity (1253 mA h g −1 ) and ultralong lifespan (1000 cycles) with a low capacity fade rate of 0.03% per cycle. Also, pouch cells fabricated with the MoB additive deliver an ultrahigh discharge capacity of 947 mA h g −1 , corresponding to a low electrolyte‐to‐capacity ratio of about 4.8 µL (mA h) −1 , and remain stable over 55 cycles under practically necessary conditions with a low electrolyte‐to‐sulfur ratio of 4.5 µL mg −1 .
- Authors:
-
[1]
- Materials Science and Engineering Program &, Texas Materials Institute The University of Texas at Austin Austin TX 78712 USA
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1785848
- Grant/Contract Number:
- DE‐SC0005397
- Resource Type:
- Publisher's Accepted Manuscript
- Journal Name:
- Advanced Materials
- Additional Journal Information:
- Journal Name: Advanced Materials Journal Volume: 32 Journal Issue: 40; Journal ID: ISSN 0935-9648
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
Citation Formats
He, Jiarui, Bhargav, Amruth, and Manthiram, Arumugam. Molybdenum Boride as an Efficient Catalyst for Polysulfide Redox to Enable High‐Energy‐Density Lithium–Sulfur Batteries. Germany: N. p., 2020.
Web. doi:10.1002/adma.202004741.
He, Jiarui, Bhargav, Amruth, & Manthiram, Arumugam. Molybdenum Boride as an Efficient Catalyst for Polysulfide Redox to Enable High‐Energy‐Density Lithium–Sulfur Batteries. Germany. https://doi.org/10.1002/adma.202004741
He, Jiarui, Bhargav, Amruth, and Manthiram, Arumugam. Sun .
"Molybdenum Boride as an Efficient Catalyst for Polysulfide Redox to Enable High‐Energy‐Density Lithium–Sulfur Batteries". Germany. https://doi.org/10.1002/adma.202004741.
@article{osti_1785848,
title = {Molybdenum Boride as an Efficient Catalyst for Polysulfide Redox to Enable High‐Energy‐Density Lithium–Sulfur Batteries},
author = {He, Jiarui and Bhargav, Amruth and Manthiram, Arumugam},
abstractNote = {Abstract Lithium–sulfur (Li–S) batteries, despite having high theoretical specific energy, possess many practical challenges, including lithium polysulfide (LiPS) shuttling. To address the issues, here, hydrophilic molybdenum boride (MoB) nanoparticles are presented as an efficient catalytic additive for sulfur cathodes. The high conductivity and rich catalytically active sites of MoB nanoparticles allow for a fast kinetics of LiPS redox in high‐sulfur‐loading electrodes (6.1 mg cm −2 ). Besides, the hydrophilic properties and good wettability toward electrolyte of MoB can facilitate electrolyte penetration and LiPS redox, guaranteeing a high utilization of sulfur under a lean‐electrolyte condition. Therefore, the cells with MoB achieve impressive electrochemical performance, including a high capacity (1253 mA h g −1 ) and ultralong lifespan (1000 cycles) with a low capacity fade rate of 0.03% per cycle. Also, pouch cells fabricated with the MoB additive deliver an ultrahigh discharge capacity of 947 mA h g −1 , corresponding to a low electrolyte‐to‐capacity ratio of about 4.8 µL (mA h) −1 , and remain stable over 55 cycles under practically necessary conditions with a low electrolyte‐to‐sulfur ratio of 4.5 µL mg −1 .},
doi = {10.1002/adma.202004741},
journal = {Advanced Materials},
number = 40,
volume = 32,
place = {Germany},
year = {Sun Aug 30 00:00:00 EDT 2020},
month = {Sun Aug 30 00:00:00 EDT 2020}
}
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