MXene based self-assembled cathode and antifouling separator for high-rate and dendrite-inhibited Li–S battery

By D. Guo, Fangwang Ming, Hang Su, Yingqiang Wu, Wandi Wahyudi, Mengliu Li, M. N. Hedhili, Guan Sheng, Lain‐Jong Li, Husam N. Alshareef and 2 more. Nano Energy, 2019

169 citations recorded by the source corpus.

Abstract We demonstrate a novel strategy to enhance sulfur loading and rate performance for Li–S battery by synchronously coupling a nanostructured cathode with an antifouling separator via a facile electrostatic self-assembly approach. The assembly of two dimensional (2D) MXene and positively charged 1D CNT-Polyethyleneimine was observed to controllably address the key issues of sluggish ionic transport, and produce an integrate cathode with dynamic crosslinking network. Moreover, an antifouling separator is proposed by this strategy for the first time, which features well-organized inter-lamellar porosity, dual polarity and high conductivity. The antifouling separator is found to play a pivotal role in: 1) low-order polysulfide activation, 2) high rate cyclability, and 3) Li dendrites inhibition. Our integrated design realizes a long-term capacity of 980 mAh g−1 at 5 mA cm−2 over 500 cycles (sulfur loading: 2.6 mg cm−2). Furthermore, a flexible self-assembled cathode with high loading (5.8 mg cm−2) and superb mechanical strength (13 MPa), demonstrates an appealing areal capacity of 7.1 mAh cm−2 and rate performance at nearly 10 mA cm−2.

Subfields: Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/363c9e2102c3657937ee5d75cb5d75c7da071c87

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In Electrical and Electronic Engineering

1. Joshua Sokolowski
2. Gang Wu
3. Sina Abdolhosseinzadeh
4. Chao Zhang
5. Linfan Cui
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In Materials Chemistry

1. Sina Abdolhosseinzadeh
2. Gang Wu
3. Chao Zhang
4. Linfan Cui
5. J. Heier

Citations in the corpus

• Two‐dimensional MXenes for lithium‐sulfur batteries (2020, methodology): “interlayer spacing by pillaring the nanosheets in order to increase surface area, are promising routes for achieving high sulfur loading electrodes.(23,86,89,93,99,114,115,118) For example, the self-supported Ti3C2Tx foam was able to uniformly accommodate a large amount of sulfur due to the well-def”
• Mechanistic understanding of the role separators playing in advanced lithium‐sulfur batteries (2020, background): “Thus, strenuous efforts have been made under the guidance of this purpose.(171,173,174,178,181,184-191) Kim et al.”