摘要
Reliable sulfur cathodes hold the key to realizing high-performance lithium-sulfur (Li-S) batteries, yet the electrochemical inefficiency and instability arising from the poor conductivity of sulfur and lithium sulfide together with polysulfide diffusion present challenges. We present here a new three-dimensional graphene aerogel embedded with in situ grown SnS2 nano-dots (SnS2-ND@G) as an efficient sulfur host. First, benefiting from a highly conductive, hierarchically porous, and mechanically self-supported architecture, the SnS2-ND@G aerogel enables the cathode to hold high sulfur content (75 wt%) and loading (up to 10 mg cm-2). Both values exceed most of the reported metal-compound-related cathode work (<60 wt% sulfur content and <3 mg cm-2 sulfur loading) in the literature. Second, this work takes advantage of a facile one-pot self-assembly fabrication, effectively guaranteeing a homogeneous deposition of SnS2 nano-dots in the graphene aerogel with a small amount of SnS2 (16 wt%). It greatly overcomes the shortcomings of physical incorporation methods to make metal-compound/carbon substrates reported in previous studies. More importantly, by rationally combining the physical entrapment from graphene and chemical adsorptivity from SnS2 nano-dots towards polysulfides, the SnS2-ND@G aerogel demonstrates remarkably improved polysulfide-trapping capability and electrochemical stability. As a result, a high peak capacity of 1234 mA h g-1, a high reversible capacity of 1016 mA h g-1 after 300 cycles, exceptional rate capability (C/10-3C rates), and impressive areal capacity (up to 11 mA h cm-2) are achieved. This work provides a viable path to integrate a conductive graphene network and nano-sized SnS2 as a promising cathode substrate for developing advanced Li-S batteries.
| 原文 | English |
|---|---|
| 頁（從 - 到） | 7659-7667 |
| 頁數 | 9 |
| 期刊 | Journal of Materials Chemistry A |
| 卷 | 6 |
| 發行號 | 17 |
| DOIs | |
| 出版狀態 | Published - 2018 一月 1 |
指紋
All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)
引用此文
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A three-dimensional self-assembled SnS2-nano-dots@graphene hybrid aerogel as an efficient polysulfide reservoir for high-performance lithium-sulfur batteries. / Luo, Liu; Chung, Sheng Heng; Manthiram, Arumugam.
於: Journal of Materials Chemistry A, 卷 6, 編號 17, 01.01.2018, p. 7659-7667.研究成果: Article
TY - JOUR
T1 - A three-dimensional self-assembled SnS2-nano-dots@graphene hybrid aerogel as an efficient polysulfide reservoir for high-performance lithium-sulfur batteries
AU - Luo, Liu
AU - Chung, Sheng Heng
AU - Manthiram, Arumugam
PY - 2018/1/1
Y1 - 2018/1/1
N2 - Reliable sulfur cathodes hold the key to realizing high-performance lithium-sulfur (Li-S) batteries, yet the electrochemical inefficiency and instability arising from the poor conductivity of sulfur and lithium sulfide together with polysulfide diffusion present challenges. We present here a new three-dimensional graphene aerogel embedded with in situ grown SnS2 nano-dots (SnS2-ND@G) as an efficient sulfur host. First, benefiting from a highly conductive, hierarchically porous, and mechanically self-supported architecture, the SnS2-ND@G aerogel enables the cathode to hold high sulfur content (75 wt%) and loading (up to 10 mg cm-2). Both values exceed most of the reported metal-compound-related cathode work (<60 wt% sulfur content and <3 mg cm-2 sulfur loading) in the literature. Second, this work takes advantage of a facile one-pot self-assembly fabrication, effectively guaranteeing a homogeneous deposition of SnS2 nano-dots in the graphene aerogel with a small amount of SnS2 (16 wt%). It greatly overcomes the shortcomings of physical incorporation methods to make metal-compound/carbon substrates reported in previous studies. More importantly, by rationally combining the physical entrapment from graphene and chemical adsorptivity from SnS2 nano-dots towards polysulfides, the SnS2-ND@G aerogel demonstrates remarkably improved polysulfide-trapping capability and electrochemical stability. As a result, a high peak capacity of 1234 mA h g-1, a high reversible capacity of 1016 mA h g-1 after 300 cycles, exceptional rate capability (C/10-3C rates), and impressive areal capacity (up to 11 mA h cm-2) are achieved. This work provides a viable path to integrate a conductive graphene network and nano-sized SnS2 as a promising cathode substrate for developing advanced Li-S batteries.
AB - Reliable sulfur cathodes hold the key to realizing high-performance lithium-sulfur (Li-S) batteries, yet the electrochemical inefficiency and instability arising from the poor conductivity of sulfur and lithium sulfide together with polysulfide diffusion present challenges. We present here a new three-dimensional graphene aerogel embedded with in situ grown SnS2 nano-dots (SnS2-ND@G) as an efficient sulfur host. First, benefiting from a highly conductive, hierarchically porous, and mechanically self-supported architecture, the SnS2-ND@G aerogel enables the cathode to hold high sulfur content (75 wt%) and loading (up to 10 mg cm-2). Both values exceed most of the reported metal-compound-related cathode work (<60 wt% sulfur content and <3 mg cm-2 sulfur loading) in the literature. Second, this work takes advantage of a facile one-pot self-assembly fabrication, effectively guaranteeing a homogeneous deposition of SnS2 nano-dots in the graphene aerogel with a small amount of SnS2 (16 wt%). It greatly overcomes the shortcomings of physical incorporation methods to make metal-compound/carbon substrates reported in previous studies. More importantly, by rationally combining the physical entrapment from graphene and chemical adsorptivity from SnS2 nano-dots towards polysulfides, the SnS2-ND@G aerogel demonstrates remarkably improved polysulfide-trapping capability and electrochemical stability. As a result, a high peak capacity of 1234 mA h g-1, a high reversible capacity of 1016 mA h g-1 after 300 cycles, exceptional rate capability (C/10-3C rates), and impressive areal capacity (up to 11 mA h cm-2) are achieved. This work provides a viable path to integrate a conductive graphene network and nano-sized SnS2 as a promising cathode substrate for developing advanced Li-S batteries.
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U2 - 10.1039/c8ta01089g
DO - 10.1039/c8ta01089g
M3 - Article
AN - SCOPUS:85046464324
VL - 6
SP - 7659
EP - 7667
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
SN - 2050-7488
IS - 17
ER -