Li Xin
@nwpu.edu.cn
Northwestern Polytechnical University
Scopus Publications
Scopus Publications
Haojie Luo, Xiaomeng Fan, Xin Li, Fang Ye, and Jimei Xue
Wiley
Electromagnetic performance regulation in mid‐infrared (MIR) and microwave (MW) spectrums is crucially significant, which can be achieved by heterophase introduction and structural manufacturing. In this work, Si‐O amorphous phase is introduced into Pt film by magnetron co‐sputtering technique, the film thickness is optimized by adjusting deposition time. After annealing treatment, a double‐layered structure is constructed with the migration and growth of Pt crystals, in which the lower layer is composed of Pt coarse grains while the upper layer is Si‐O amorphous phase with embedded Pt fine grains. Furthermore, due to the thickness difference, diverse kinds of structural patterns (arrays or mesh) can be obtained with the solid‐state dewetting of the lower layer. According to the increasing thickness, the infrared emissivity can decrease from 0.67 to 0.25 (8–14 μm), demonstrating a great decline of apparent temperature of 162.9 °C when the background is 300 °C. And the microwave transmissivity also exhibits tremendous variation over 90% (from 96% to 5%), realizing the transformation from transmitting to shielding.
Chao Yang, Haosen Yin, Qi Lou, Zhi Cheng, Yuge Bai, Yining Su, Xin Li, Bin Zhao, Minggang Xia, and Xiaogang Han
Elsevier BV
Xin Li, Xiaomeng Fan, Wenjie Zhu, Xiaoke Lu, Jianyong Tu, Jiangyi He, Jimei Xue, Fang Ye, Yongsheng Liu, and Laifei Cheng
Elsevier BV
Xin Li, Guohong Wang, Qiang Li, Yijin Wang, and Xiaoke Lu
Elsevier BV
Haojie Luo, Xiaomeng Fan, Jianyong Tu, Jiangyi He, Xin Li, Jimei Xue, Fang Ye, and Laifei Cheng
Elsevier BV
Xin Li, Xiaoke Lu, Minghang Li, Jimei Xue, Fang Ye, Xiaomeng Fan, Yongsheng Liu, Laifei Cheng, and Litong Zhang
Elsevier BV
Meng Zhu, Xuanxuan Yan, Xin Li, Lei Dai, Junhao Guo, Yuting Lei, Yongjian Xu, and Hailong Xu
American Chemical Society (ACS)
An optical transparent and hazy film with admirable flexibility, electromagnetic interference (EMI) shielding, and Joule heating performance meeting the requirements of optoelectronic devices is significantly desirable. Herein, a cellulose paper was infiltrated by epoxy resin to fabricate a transparent cellulose paper (TCP) with high transparency, optical haze, and favorable flexibility, owing to effective light scattering and mechanical enhancement of the cellulose network. Moreover, a highly connected silver nanowire (AgNW) network was constructed on the TCP substrate by the spray-coating method and appropriate thermal annealing technique to realize high electrical conductivity and favorable optical transmittance of the composite film at the same time, followed by coating of a polydimethylsiloxane (PDMS) layer for protection of the AgNW network. The obtained PDMS/AgNWs/TCP composite film features considerable optical transmittance (up to 86.8%) and haze (up to 97.7%), while satisfactory EMI shielding effectiveness (SE) (up to 39.1 dB, 8.2-12.4 GHz) as well as strong mechanical strength (higher than 41 MPa) were achieved. The coated PDMS layer prevented the AgNW network from falling off and ensured the long-term stability of the PDMS/AgNWs/TCP composite film under deformations. In addition, the multifunctional PDMS/AgNWs/TCP composite film also exhibited excellent Joule heating performance with low supplied voltages, rapid response, and sufficient stability. This work demonstrates a novel pathway to improve the performance of multifunctional transparent composite films for future advanced optoelectronic devices.
Xiaoke Lu, Dongmei Zhu, Xin Li, and Yijin Wang
Elsevier BV
Xiaoke Lu, Xin Li, Yuchen Cao, Wenjie Zhu, Yijin Wang, Zhaowen Ren, and Dongmei Zhu
American Chemical Society (ACS)
Modern electromagnetic (EM) absorbing materials (EAMs) are experiencing a revolution triggered by advanced information technology. Simultaneously, the diverse harsh EM application scenarios entail a more stringent appeal of practicability to EAMs, especially under high-temperature conditions. Therefore, exploring EAMs with both excellent absorbing performance and practicability at elevated temperatures is necessary. Herein, a novel 3D porous carbon foam/carbon nanotubes@Si3N4 (CF/CNTs@Si3N4) heterostructure was constructed by the chemical vapor infiltration process. The optimally grown 1D CNTs embedded in 3D CF/Si3N4 are utilized to provide abundant nanointerface coupling effects to compensate for the excessive increase in the conductive loss during rising temperature to realize a self-adjustment in response to high temperature. A high-efficiency EM absorption over a wide temperature range from 25 to 480 °C was achieved (with a ≥90% absorbing ratio covering the whole X-band). In addition, the Si3N4 coating can improve the thermal stability of the carbon matrix and maintain the tailored inner structure. Multiple investigations into other environmental adaptabilities also exhibited the application perspective of such a heterostructure. This work points out a new strategy for preparing designable, efficient, and high-temperature applicable EAMs, promoting the diverse development of electronic devices.
Kai Zhao, Fang Ye, Laifei Cheng, Renzhang Liu, Jie Liang, and Xin Li
Elsevier BV
Minghang Li, Wenjie Zhu, Xin Li, Hailong Xu, Xiaomeng Fan, Hongjing Wu, Fang Ye, Jimei Xue, Xiaoqiang Li, Laifei Cheng,et al.
Wiley
Heterogeneous interface design to boost interfacial polarization has become a feasible way to realize high electromagnetic wave absorbing (EMA) performance of dielectric materials. However, interfacial polarization in simple structures such as particles, rods, and flakes is weak and usually plays a secondary role. In order to enhance the interfacial polarization and simultaneously reduce the electronic conductivity to avoid reflection of electromagnetic wave, a more rational geometric structure for dielectric materials is desired. Herein, a Ti3C2Tx/MoS2 self‐rolling rod‐based foam is proposed to realize excellent interfacial polarization and achieve high EMA performance at ultralow density. Different surface tensions of Ti3C2Tx and ammonium tetrathiomolybdate are utilized to induce the self‐rolling of Ti3C2Tx sheets. The rods with a high aspect ratio not only remarkably improve the polarization loss but also are beneficial to the construction of Ti3C2Tx/MoS2 foam, leading to enhanced EMA capability. As a result, the effective absorption bandwidth of Ti3C2Tx/MoS2 foam covers the whole X band (8.2–12.4 GHz) with a density of only 0.009 g cm−3, at a thickness of 3.3 mm. The advantages of rod structures are verified through simulations in the CST microwave studio. This work inspires the rational geometric design of micro/nanostructures for new‐generation EMA materials.
Xiaoke Lu, Xin Li, Wenjie Zhu, and Hailong Xu
Elsevier BV
Xiaoke Lu, Xin Li, Yijin Wang, Wei Hu, Wenjie Zhu, Dongmei Zhu, and Yuchang Qing
Elsevier BV
Xinliang Li, Minghang Li, Xin Li, Xiaomeng Fan, and Chunyi Zhi
American Association for the Advancement of Science (AAAS)
Advanced scenario-adaptable infrared (IR) stealth materials are crucial for creating localized closed thermal environments. Low emissivity over the broadest possible band is expected, as is superior mechanical deformability. Herein, we report a series of Ti-based MXenes with naturally low emissivity as ideal IR shielding materials. Over a wavelength ranging from 2.5 to 25 μ m, Ti 3 C 2 T X film delivers an average emissivity of 0.057 with the lowest point of 0.042. Such a low emissivity coupled with outstanding structural shaping capability is beyond the current grasp. The reflection-dominated mechanism is dissected. Also, some intriguing scenarios of IR stealth for wearable electronic devices and skin thermal control are demonstrated. This finding lights an encouraging path toward next-generation IR shielding by the expanding MXene family.
Xiaoke Lu, Dongmei Zhu, Xin Li, Minghang Li, Qiang Chen, and Yuchang Qing
Springer Science and Business Media LLC
Xin Li, Minghang Li, Xiaoke Lu, Wenjie Zhu, Hailong Xu, Jimei Xue, Fang Ye, Yongsheng Liu, Xiaomeng Fan, and Laifei Cheng
Elsevier BV
Xiaoke Lu, Dongmei Zhu, Xin Li, Minghang Li, Qiang Chen, and Yuchang Qing
American Chemical Society (ACS)
Xiaomeng Fan, Ruizhe Yuan, Xin Li, Hailong Xu, Luo Kong, Guanglei Wu, Litong Zhang, and Laifei Cheng
Elsevier BV
Xiaomeng Fan, Minghang Li, Xin Li, Fang Ye, Jimei Xue, Litong Zhang, and Laifei Cheng
Elsevier BV
Hailong Xu, Xiaowei Yin, Minghang Li, Xinliang Li, Xin Li, Xiaolin Dang, Litong Zhang, and Laifei Cheng
American Chemical Society (ACS)
Microwave absorption materials (MAMs) with lightweight density and ultrabroad-band microwave absorption performance are urgently needed in advanced MAMs, which are still a big challenge and have been rarely achieved. Here, a new wide bandwidth absorption model was designed, which fuses the electromagnetic resonance loss ability of a periodic porous structure in the low-frequency range and the dielectric loss ability of dielectric materials in the high-frequency range. Based on this model, a lightweight porous cellulose nanofiber (CNF)/carbon nanotube (CNT) foam consisting of a cellular vertical porous architecture with the macropore diameters between 30 and 90 μm and a nanoporous architecture at a scale of 1.7-50 nm was obtained by an ice-template method using CNTs and CNFs as "building blocks". Benefiting from the unique architecture, the effective absorption bandwidth reaches 29.7 GHz, and its specific microwave absorption performance exceeds 80,000 dB·cm-2·g-1, which far surpasses those of the MAMs previously reported, including all CNT-based composites. Moreover, the CNF/CNT foam possesses ultralow density (9.2 mg/cm3) and strong fatigue resistance, all coming from the well-interconnected porous structure and the strong hydrogen bonds among CNF-CNF and CNF-CNT molecular chains.
Hanjun Wei, Xiaowei Yin, Xin Li, Minghang Li, Xiaolin Dang, Litong Zhang, and Laifei Cheng
Elsevier BV