Journal ArticleDOI
Electromagnetic interference shielding with 2D transition metal carbides (MXenes)
Faisal Shahzad,Mohamed Alhabeb,Christine B. Hatter,Babak Anasori,Soon Man Hong,Chong Min Koo,Yury Gogotsi +6 more
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TLDR
The mechanical flexibility and easy coating capability offered by MXenes and their composites enable them to shield surfaces of any shape while providing high EMI shielding efficiency.Abstract:
Materials with good flexibility and high conductivity that can provide electromagnetic interference (EMI) shielding with minimal thickness are highly desirable, especially if they can be easily processed into films. Two-dimensional metal carbides and nitrides, known as MXenes, combine metallic conductivity and hydrophilic surfaces. Here, we demonstrate the potential of several MXenes and their polymer composites for EMI shielding. A 45-micrometer-thick Ti3C2Tx film exhibited EMI shielding effectiveness of 92 decibels (>50 decibels for a 2.5-micrometer film), which is the highest among synthetic materials of comparable thickness produced to date. This performance originates from the excellent electrical conductivity of Ti3C2Tx films (4600 Siemens per centimeter) and multiple internal reflections from Ti3C2Tx flakes in free-standing films. The mechanical flexibility and easy coating capability offered by MXenes and their composites enable them to shield surfaces of any shape while providing high EMI shielding efficiency.read more
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In situ atomistic insight into the growth mechanisms of single layer 2D transition metal carbides
Xiahan Sang,Yu Xie,Dundar E. Yilmaz,Roghayyeh Lotfi,Mohamed Alhabeb,Alireza Ostadhossein,Babak Anasori,Weiwei Sun,Xufan Li,Kai Xiao,Paul R. C. Kent,Adri C. T. van Duin,Yury Gogotsi,Raymond R. Unocic +13 more
TL;DR: In situ aberration-corrected scanning transmission electron microscopy is used to reveal the homoepitaxial growth mechanisms of a single TiC adlayer from a Ti3C2 monolayer substrate, which could lead to the development of bottom-up synthesis methods using substrates terminated with similar hexagonal-metal surfaces.
Journal ArticleDOI
0D/2D NiS2/V-MXene composite for electrocatalytic H2 evolution
TL;DR: The theoretical and experimental studies on the intrinsic structural and electrochemical properties of V-MXene-based hybrid (NiS2/V-MXenes) to verify the possibility of using it as a potential electrocatalyst for HER are presented in this paper.
Journal ArticleDOI
Ultrathin Densified Carbon Nanotube Film with "Metal-like" Conductivity, Superior Mechanical Strength, and Ultrahigh Electromagnetic Interference Shielding Effectiveness.
Yan Jun Wan,Xiao-Yun Wang,Xing-Miao Li,Si-Yuan Liao,Zhiqiang Lin,Yougen Hu,Tao Zhao,Xiaoliang Zeng,Chun-Hong Li,Shuhui Yu,Pengli Zhu,Rong Sun,Ching-Ping Wong +12 more
TL;DR: An ultrathin densified carbon nanotube (CNT) film with superior mechanical properties and ultrahigh shielding effectiveness is prepared, representing a critical breakthrough in the preparation of shielding film toward applications in wearable electronics and 5G communication.
Journal ArticleDOI
Ultra-thin and highly flexible cellulose nanofiber/silver nanowire conductive paper for effective electromagnetic interference shielding
Yiming Chen,Liang Pang,Yang Li,Heng Luo,Gaigai Duan,Changtong Mei,Wenhui Xu,Wei Zhou,Kunming Liu,Shaohua Jiang +9 more
TL;DR: In this paper, a cellulose nanofiber (CNF)/silver nanowire (AgNW) conductive paper with a distinctive hierarchical structure was obtained by a facile blending-filtration-peeling process.
Journal ArticleDOI
Ambient-Stable Two-Dimensional Titanium Carbide (MXene) Enabled by Iodine Etching.
Huanhuan Shi,Panpan Zhang,Zaichun Liu,SangWook Park,Martin R. Lohe,Yuping Wu,Ali Shaygan Nia,Sheng Yang,Xinliang Feng +8 more
TL;DR: In this paper, a fluoride-free, iodine-assisted etching route for preparing 2D MXene (Ti3 C2 Tx, T=O, OH) with oxygen-rich terminal groups and intact lattice structure is presented.
References
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Journal ArticleDOI
Two‐Dimensional Nanocrystals Produced by Exfoliation of Ti 3 AlC 2
Michael Naguib,Murat Kurtoglu,Volker Presser,Jun Lu,Junjie Niu,Min Heon,Lars Hultman,Yury Gogotsi,Michel W. Barsoum +8 more
TL;DR: 2D nanosheets, composed of a few Ti 3 C 2 layers and conical scrolls, produced by the room temperature exfoliation of Ti 3 AlC 2 in hydrofl uoric acid are reported, which opens a door to the synthesis of a large number of other 2D crystals.
Journal ArticleDOI
25th Anniversary Article: MXenes: A New Family of Two‐Dimensional Materials
TL;DR: In this article, a new family of two-dimensional early transition metal carbides and carbonitrides, called MXenes, was discovered and a detailed outlook for future research on MXenes is also presented.
Journal ArticleDOI
Conductive two-dimensional titanium carbide ‘clay’ with high volumetric capacitance
TL;DR: This capacitance report reports a method of producing two-dimensional titanium carbide ‘clay’ using a solution of lithium fluoride and hydrochloric acid that offers a much faster route to film production as well as the avoidance of handling hazardous concentrated hydrofluoric acid.
Journal ArticleDOI
Cation Intercalation and High Volumetric Capacitance of Two-Dimensional Titanium Carbide
Maria R. Lukatskaya,Olha Mashtalir,Chang E. Ren,Yohan Dall'Agnese,Patrick Rozier,Pierre-Louis Taberna,Michael Naguib,Patrice Simon,Patrice Simon,Michel W. Barsoum,Yury Gogotsi +10 more
TL;DR: This study demonstrates the spontaneous intercalation of cations from aqueous salt solutions between two-dimensional (2D) Ti3C2 MXene layers, and provides a basis for exploring a large family of 2D carbides and carbonitrides in electrochemical energy storage applications using single- and multivalent ions.
Journal ArticleDOI
Electromagnetic interference shielding effectiveness of carbon materials
TL;DR: Carbon materials for electromagnetic interference (EMI) shielding are reviewed in this article, including composite materials, colloidal graphite and flexible graphite, and they include carbon filaments of submicron diameter.